# List of Pennsylvania railroads

The following railroads operate in the U.S. state of Pennsylvania.

## Common freight carriers

* Aliquippa and Ohio River Railroad (AOR) Genesee & Wyoming
* Allegheny Valley Railroad (AVR)
* Allentown and Auburn Railroad (ALLN)
* BD Highspire Holdings (BDHH)
* Belvidere and Delaware River Railway (BDRV)
* Brandywine Valley Railroad (BVRY)
* Buffalo and Pittsburgh Railroad (BPRR) (Genesee & Wyoming)
* Canadian National Railway (CN) through subsidiary Bessemer and Lake Erie Railroad (BLE)
* Canadian Pacific Kansas City (CPKC) through subsidiary Delaware and Hudson Railway (DH)
* Central New York Railroad (CNYK)
* Chestnut Ridge Railroad (CHR)
* Columbia and Reading Railway (CORY)
* Conrail Shared Assets Operations (CRR)
** operates Philadelphia Belt Line Railroad (PBL)
* CSX (CSX)
* Delaware-Lackawanna Railroad (DL)
* East Erie Commercial Railroad (EEC)
* East Penn Railroad (ESPN) (Regional Rail, LLC)
* Elizabethtown Industrial Railroad (EZR)
* Everett Railroad (EV)
* Gettysburg and Northern Railroad (GET)
* Juniata Valley Railroad (JVRR) North Shore Railroad)
* Kasgro Rail Lines (KRL)
* Kiski Junction Railroad (KJR)
* Landisville Railroad (LVR)
* Lehigh Railway (LRWY)
* Lehigh Valley Rail Management (LVRB, LVRC, LVRJ)
* Luzerne and Susquehanna Railway (LS)
* Lycoming Valley Railroad (LVRR) (North Shore Railroad (Pennsylvania))
* Maryland Midland Railway (MMID) (Genesee & Wyoming)
* Middletown & Hummelstown Railroad (MIDH)
* New Castle Industrial Railroad (NCIR)
* New Hope Railroad (NHRR)
* New York, Susquehanna and Western Railway (NYSW)
* Nittany and Bald Eagle Railroad (NBER) (North Shore Railroad (Pennsylvania))
* Norfolk Southern (NS)
* NDC Railroad (NDC)
* North Shore Railroad (NSHR)
* Oil Creek and Titusville Railroad (OCTL)
* Pennsylvania & Southern Railway (PSCC)
* Pennsylvania Northeastern Railroad (PN)
* Pennsylvania Southwestern Railroad (PSWR)
* Pittsburgh, Allegheny and McKees Rocks Railroad (PAM)
* Pittsburgh and Ohio Central Railroad (POHC) (Genesee & Wyoming)
* Reading Blue Mountain and Northern Railroad (RBMN)
* R.J. Corman Railroad/Allentown Line (RJCN)
* R.J. Corman Railroad/Pennsylvania Lines (RJCP)
* Shamokin Valley Railroad (SVRR) (North Shore Railroad (Pennsylvania))
* SMS Rail Lines (SRL)
** Operates Penn Jersey Rail Lines
* Southwest Pennsylvania Railroad (SWP)
* Strasburg Railroad (SRC)
* Tyburn Railroad (TYBR) (Regional Rail, LLC)
* Union Railroad (URR)
* Union County Industrial Railroad (UCIR) (North Shore Railroad (Pennsylvania))
* Upper Merion & Plymouth Railroad (UMP)
* Wellsboro and Corning Railroad (WCOR) (Genesee & Wyoming)
* Western New York and Pennsylvania Railroad (WNYP)
* Wheeling and Lake Erie Railway (WE)
* York Railway (YRC) (Genesee and Wyoming)
** Operates Maryland and Pennsylvania Railroad (Genesee & Wyoming) and Yorkrail
* Youngstown and Southeastern Railroad (YSRR)

## Private freight carriers

* Cumberland Mine Railroad
* Alpha Natural Resources
* Conshohocken Recycling and Rail Transfer, Inc (CRRT)
* Juniata Terminal Company (JTFS)
* Leetsdale Industrial Terminal Railway (LIT)

## Passenger carriers

Pennsylvania passenger rail :
Legend :
Services :
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* Allentown and Auburn Railroad (heritage railroad)
* Amtrak (AMTK) (national passenger rail)
* CamTran (Johnstown mass transit agency operates Johnstown Inclined Plane)
* Colebrookdale Railroad (heritage railroad)
* Delaware Lackawanna RailRoad
* East Broad Top Railroad and Coal Company
* Fayette Central Railroad (tourist trains operating over Southwest Pennsylvania Railroad trackage)
* Kiski Junction Railroad (working railroad that also operates tourist trains)
* Lehigh Gorge Scenic Railway (heritage railroad)
* Lehigh Lackawanna RailRoad
* Middletown and Hummelstown Railroad (working railroad, but with emphasis on tourist trains)
* New Hope Railroad (working railroad that also operates tourist trains)
* New Jersey Transit Rail Operations (Atlantic City Line commuter train travels from Philadelphia)
* Oil Creek and Titusville Lines (working railroad, but with emphasis on tourist trains)
* Pioneer Lines Scenic Railway (heritage railroad)
* Port Authority of Allegheny County (Pittsburgh mass transit agency that operates The T light rail, the Monongahela Incline, and the Duquesne Incline)
* Port Authority Transit Corporation (Bi-state authority operates Philadelphia-Camden County subway line)
* SEPTA (Philadelphia mass transit agency that operates SEPTA Regional Rail commuter lines, the Philadelphia Subway, and a variety of suburban light rail lines)
* Strasburg Railroad (heritage railroad)
* Tioga Central Railroad (heritage railroad)
* Wanamaker, Kempton and Southern Railroad (heritage railroad)
* West Chester Railroad (heritage railroad)

## Museums and historic sites

* Allegheny Portage Railroad
* Howard Tunnel
* Electric City Trolley Museum
* Gallitzin Tunnel
* Horseshoe Curve
* Mars Station, Pennsylvania
* Pennsylvania Trolley Museum
* Railroad Museum of Pennsylvania
* Reading Company Technical & Historical Society
* Rockhill Trolley Museum
* Steamtown National Historic Site
* Western Pennsylvania Model Railroad Museum

## Defunct railroads

| Name | Mark | System | From | To | Successor | Notes |
| Addison and Pennsylvania Railway | | B&O | 1887 | 1898 | Susquehanna and New York Railroad |
| Addison and Northern Pennsylvania Railway | | B&O | 1882 | 1887 | Addison and Pennsylvania Railway |
| Aliquippa and Southern Railroad | ALQS | | 1906 | 2002 | Aliquippa and Ohio River Railroad |
| Allegheny Railroad | ALY | | 1985 | 1992 | Allegheny and Eastern Railroad |
| Allegheny and Bald Eagle Railroad, Coal and Iron Company | | PRR | 1839 | 1859 | Bellefonte and Snowshoe Railroad |
| Allegheny and Eastern Railroad | ALY | | 1992 | | | Still exists as a nonoperating subsidiary of the Buffalo and Pittsburgh Railroad |
| Allegheny Junction Railroad | | | 1898 | 1907 | N/A |
| Allegheny and South Side Railway | AYSS | | 1892 | | |
| Allegheny Southern Railway | ASRW | | 1982 | 1985 | Everett Railroad |
| Allegheny Terminal Company | | | 1899 | | |
| Allegheny Valley Railroad | | PRR | 1852 | 1891 | Allegheny Valley Railway |
| Allegheny Valley Railway | | PRR | 1892 | 1910 | Pennsylvania Railroad |
| Allegheny and Western Railway | | B&O | 1896 | | | Still exists as a nonoperating subsidiary of CSX Transportation |
| Allentown Railroad | | RDG | 1853 | 1945 | Reading Company |
| Allentown Terminal Railroad | | CNJ/ RDG | 1888 | 1976 | Consolidated Rail Corporation |
| Altoona and Beech Creek Railroad | | | 1897 | 1910 | Altoona, Juniata and Northern Railway |
| Altoona, Clearfield and Northern Railroad | | | 1891 | 1897 | Altoona and Beech Creek Railroad |
| Altoona, Juniata and Northern Railway | | | 1910 | 1913 | Altoona Northern Railroad |
| Altoona Northern Railroad | | | 1912 | 1919 | N/A |
| Altoona and Philipsburg Connecting Railroad | | | 1892 | 1906 | New York and Pittsburgh Air Line Railroad |
| Anthracite Railway | ATRW | | 1983 | 1989 | Blue Mountain and Reading Railroad |
| Arnot and Pine Creek Railroad | | ERIE | 1881 | 1937 | Tioga Railroad |
| Atlantic and Great Western Railroad | | ERIE | 1871 | 1880 | New York, Pennsylvania and Ohio Railroad |
| Atlantic and Great Western Railroad | | ERIE | 1858 | 1865 | Atlantic and Great Western Railway |
| Atlantic and Great Western Railway | | ERIE | 1865 | 1871 | Atlantic and Great Western Railroad |
| Auburn and Port Clinton Railroad | | RDG | 1854 | 1857 | Allentown Railroad |
| Altoona and Wopsononock Railroad | | | 1890 | 1891 | Altoona, Clearfield and Northern Railroad |
| Bachman Valley Railroad | | WM | 1871 | 1886 | Baltimore and Harrisburg Railway |
| Bald Eagle Valley Railroad | | PRR | 1861 | 1908 | Pennsylvania Railroad |
| Baltimore Coal and Union Railroad Company | | D&H | 1868 | 1871 | Northern Coal and Iron Company |
| Baltimore and Cumberland Valley Railroad | | WM | 1878 | 1917 | Western Maryland Railway |
| Baltimore and Cumberland Valley Railroad Extension Company | | WM | 1880 | | | Still exists as a nonoperating subsidiary of CSX Transportation |
| Baltimore and Hanover Railroad | | WM | 1877 | 1886 | Baltimore and Harrisburg Railway |
| Baltimore and Harrisburg Railway | | WM | 1886 | 1917 | Western Maryland Railway |
| Baltimore and Harrisburg Railway (Eastern Extension) | | WM | 1888 | 1917 | Western Maryland Railway |
| Baltimore and Harrisburg Railway (Western Extension) | | WM | 1888 | 1917 | Western Maryland Railway |
| Baltimore and Lehigh Railroad | | | 1891 | 1894 | York Southern Railroad |
| Baltimore and Ohio Railroad | B&O, BO | B&O | 1876 | 1987 | Chesapeake and Ohio Railway |
| Baltimore and Ohio Railroad in Pennsylvania | | B&O | 1912 | 1980 | Baltimore and Ohio Railroad |
| Baltimore and Ohio Short Line Railroad | | B&O | 1885 | 1887 | Wheeling, Pittsburgh and Baltimore Railroad |
| Baltimore and Philadelphia Railroad | | B&O | 1883 | 1989 | CSX Transportation |
| Baltimore and Philadelphia Railway | | B&O | 1883 | 1883 | Baltimore and Philadelphia Railroad |
| Bangor and Bath Railroad | | DL&W | 1880 | 1880 | Bangor and Portland Railway |
| Bangor and Portland Railway | | DL&W | 1879 | 1909 | Delaware, Lackawanna and Western Railroad |
| Barclay Railroad | | LV | 1891 | 1902 | Susquehanna and New York Railroad |
| Barclay Coal Company | | LV | 1862 | 1891 | Barclay Railroad |
| Barclay Railroad and Coal Company | | LV | 1854 | 1862 | Barclay Coal Company |
| Bare Rock Railroad | | | 1892 | | |
| Bear Creek Railroad | | B&LE | 1865 | 1867 | Shenango and Allegheny Railroad |
| Beaver Connecting Railroad | | | | | |
| Beaver and Ellwood Railroad | | PLE | 1890 | 1916 | Pittsburgh and Lake Erie Railroad |
| Beaver Meadow Railroad and Coal Company | | LV | 1830 | 1864 | Lehigh Valley Railroad |
| Beaver Meadow, Tresckow and New Boston Railroad | | CNJ | 1894 | | N/A |
| Beaver Valley Railroad | | PLE/ PRR | 1899 | 1941 | Cleveland and Pittsburgh Railroad, Pittsburgh and Lake Erie Railroad |
| Bedford Railroad | | | 1859 | 1864 | Huntingdon and Broad Top Mountain Railroad and Coal Company |
| Bedford and Blair County Railroad | | PRR | 1893 | 1894 | Pennsylvania Midland Railroad |
| Bedford and Bridgeport Railroad | | PRR | 1868 | 1891 | Bedford and Bridgeport Railway |
| Bedford and Bridgeport Railway | | PRR | 1891 | 1911 | Hollidaysburg, Bedford and Cumberland Railroad |
| Bedford and Hollidaysburg Railroad | | PRR | 1902 | 1911 | Hollidaysburg, Bedford and Cumberland Railroad |
| Beech Creek Railroad | | NYC | 1886 | 1976 | Consolidated Rail Corporation |
| Beech Creek, Clearfield and Southwestern Railroad | | NYC | 1883 | 1886 | Beech Creek Railroad |
| Beech Creek Extension Railroad | | NYC | 1901 | 1961 | New York Central Railroad |
| Bellefonte and Buffalo Run Railroad | | | 1882 | 1882 | Buffalo Run, Bellefonte and Bald Eagle Railroad |
| Bellefonte Central Railroad | BFC | | 1892 | 1985 | Nittany and Bald Eagle Railroad |
| Bellefonte, Nittany and Lemont Railroad | | PRR | 1883 | 1889 | Bald Eagle Valley Railroad |
| Bellefonte and Snowshoe Railroad | | PRR | 1859 | 1881 | Bald Eagle Valley Railroad |
| Bell's Gap Railroad | | PRR | 1871 | 1889 | Pennsylvania and North Western Railroad |
| Bells Run Railroad | | | 1903 | | |
| Belvidere Delaware Railroad | | PRR | 1896 | 1958 | United New Jersey Railroad and Canal Company |
| Berks and Chester Railroad | | RDG | 1864 | 1866 | Wilmington and Reading Railroad |
| Berks County Railroad | | RDG | 1871 | 1874 | Reading and Lehigh Railroad |
| Berlin Railroad | | B&O | 1879 | 1912 | Baltimore and Ohio Railroad in Pennsylvania |
| Berlin Branch Railroad | | | 1876 | 1903 | East Berlin Railway |
| Bethlehem Railroad | | LNE | 1861 | 1864 | Lehigh and Lackawanna Railroad |
| Big Level and Bradford Railroad | | B&O | 1881 | 1883 | Pittsburgh, Bradford and Buffalo Railway |
| Big Level and Kinzua Railroad | | B&O | 1881 | 1911 | Pittsburgh and Western Railroad |
| Binghamton, Towanda and Western Railway | | LV | 1902 | 1902 | Susquehanna and New York Railroad |
| Blacklick and Yellow Creek Railroad | | | 1904 | 1911 | Cambria and Indiana Railroad |
| Blacksville and Western Railway | | MGA | 1917 | 1917 | Morgantown and Wheeling Railway |
| Bloom Run Railroad | | | 1902 | | |
| Bloomsburg and Sullivan Railroad | BBS | RDG | 1883 | 1928 | Reading Company |
| Blossburg Coal Mining and Railroad Company | | | 1866 | 1885 | Erie Railroad |
| Blue Mountain and Reading Railroad | BMRG | | 1983 | 1995 | Reading Blue Mountain & Northern Railroad |
| Bradford Railroad | | PRR | 1911 | 1932 | Western New York and Pennsylvania Railway |
| Bradford Railway | | PRR | 1881 | 1911 | Bradford Railroad |
| Bradford, Bordell and Kinzua Railroad | | | 1880 | 1892 | Bradford, Bordell and Kinzua Railway |
| Bradford, Bordell and Kinzua Railway | | | 1892 | 1903 | Buffalo, Bradford and Kane Railroad |
| Bradford, Bordell and Smethport Railroad | | | 1880 | 1892 | Bradford, Bordell and Kinzua Railway |
| Bradford and Foster Brook Railway | | | 1877 | 1879 | N/A |
| Bradford Industrial Rail | BR | | 1993 | 2004 | Buffalo and Pittsburgh Railroad |
| Bradford and State Line Railroad | | B&O | 1881 | 1881 | Rochester and Pittsburgh Railroad |
| Bradford and Western Pennsylvania Railroad | | | 1891 | | |
| Bridgeport and Widemire Railway | | B&O | 1896 | 1913 | Clearfield and Mahoning Railway |
| Bristol Industrial Terminal Railway | BITY | | 1992 | 1997 | Penn Eastern Rail Lines |
| Brock Railroad | | | 1903 | | |
| Brockport and Shawmut Railroad | | ERIE | 1886 | 1940 | New York, Lake Erie and Western Coal and Railroad Company |
| Brockwayville and Punxsutawney Railroad | | B&O | 1882 | 1891 | Buffalo, Rochester and Pittsburgh Railway |
| Brooks Mills and Altoona Railroad | | PRR | 1894 | 1894 | Pennsylvania Midland Railroad |
| Brookville Railway | | | 1896 | | |
| Brookville and Mahoning Railroad | | PS&N | 1903 | 1909 | Pittsburg and Shawmut Railroad |
| Brownstone and Middletown Railroad | | | 1892 | | N/A |
| Brownsville Railway | | PRR | 1875 | 1880 | Pittsburgh, Virginia and Charleston Railway |
| Brownsville and New Haven Railway | | B&O | 1876 | 1882 | Ohio and Baltimore Short Line Railway |
| Brownsville and State Line Railroad | | PRR | 1893 | 1894 | Pittsburgh, Virginia and Charleston Railway |
| Bruce and Clairton Railroad | | P&WV | 1901 | 1902 | West Side Belt Railroad |
| Buffalo and Bradford Railroad | | ERIE | 1856 | 1859 | Buffalo, Bradford and Pittsburgh Railroad |
| Buffalo, Bradford and Kane Railroad | | | 1904 | 1931 | N/A | Operated by Mount Jewett, Kinzua and Riterville Railroad |
| Buffalo, Bradford and Pittsburgh Railroad | | ERIE | 1859 | 1941 | Erie Railroad |
| Buffalo, Chautauqua Lake and Pittsburgh Railway | | PRR | 1879 | 1880 | Pittsburgh, Titusville and Buffalo Railway |
| Buffalo, Corry and Pittsburgh Railroad | | PRR | 1867 | 1872 | Corry and State Line Railroad |
| Buffalo, Cleveland and Chicago Railway | | NKP | 1881 | 1881 | New York, Chicago and St. Louis Railway |
| Buffalo Coal and Iron Company | | DL&W | 1856 | 1860 | Continental Coal Company |
| Buffalo and Erie Railroad | | NYC | 1867 | 1869 | Lake Shore and Michigan Southern Railway |
| Buffalo, New York and Philadelphia Railroad | | PRR | 1883 | 1887 | Western New York and Pennsylvania Railway of Pennsylvania |
| Buffalo, New York and Philadelphia Railway | | PRR | 1871 | 1883 | Buffalo, New York and Philadelphia Railroad |
| Buffalo, Pittsburgh and Western Railroad | | PRR | 1881 | 1883 | Buffalo, New York and Philadelphia Railroad |
| Buffalo, Rochester and Pittsburgh Railway | BR&P | B&O | 1887 | | | Still exists as a nonoperating subsidiary of CSX Transportation |
| Buffalo Run, Bellefonte and Bald Eagle Railroad | | | 1882 | 1891 | Bellefonte Central Railroad |
| Buffalo and St. Marys Railroad | | PS&N | 1895 | 1897 | Buffalo, St. Marys and Southwestern Railroad |
| Buffalo, St. Marys and Southwestern Railroad | | PS&N | 1897 | 1899 | Pittsburg, Shawmut and Northern Railroad |
| Buffalo and Susquehanna Railroad | B&S | B&O | 1891 | 1954 | Baltimore and Ohio Railroad |
| Buffalo and Susquehanna Railway | | B&O | 1907 | 1910 | N/A | Leased the Buffalo and Susquehanna Railroad |
| Buffalo Valley Railroad | | B&O | 1868 | 1879 | Berlin Railroad |
| Buffalo and Washington Railway | | PRR | 1866 | 1871 | Buffalo, New York and Philadelphia Railway |
| Bustleton Railroad | | PRR | 1891 | 1902 | Connecting Railway |
| Bustleton and Eastern Railroad | | PRR | 1893 | 1893 | Philadelphia, Bustleton and Trenton Railroad |
| Butler and Pittsburgh Railroad | | B&LE | 1896 | 1897 | Pittsburg, Bessemer and Lake Erie Railroad |
| Caledonia Iron, Land and Railroad Company | | PRR | 1867 | 1869 | Southern Pennsylvania Iron and Railroad Company |
| Cambria and Clearfield Railroad | | PRR | 1887 | 1903 | Cambria and Clearfield Railway |
| Cambria and Clearfield Railway | | PRR | 1903 | 1913 | Pennsylvania Railroad |
| Cambria County Railroad | | NYC | 1896 | 1898 | Beech Creek Railroad |
| Cambria and Indiana Railroad | CI | | 1911 | 1994 | N/A |
| Cammal and Black Forest Railway | | | 1894 | | |
| Canoe Creek Railroad | | NYC | 1900 | 1901 | Beech Creek Extension Railroad |
| Carbon Limestone Railroad | | PLE | 1894 | 1894 | Mahoning State Line Railroad |
| Catasauqua and Fogelsville Railroad | | RDG | 1854 | 1944 | Reading Company |
| Catawissa Railroad | | RDG | 1860 | 1953 | Reading Company |
| Catawissa, Williamsport and Erie Railroad | | RDG | 1849 | 1860 | Catawissa Railroad |
| Central Columbiana and Pennsylvania Railway | CQPA | | 2001 | 2004 | Ohio and Pennsylvania Railroad |
| Central Railroad of New Jersey | CNJ | CNJ | 1952 | 1976 | Consolidated Rail Corporation |
| Central Railroad of New Jersey | CNJ | CNJ | 1871 | 1946 | Central Railroad of Pennsylvania |
| Central Railroad of Pennsylvania | CRP | CNJ | 1944 | 1976 | Consolidated Rail Corporation |
| Central Railroad of Pennsylvania | | | 1891 | 1918 | N/A |
| Central Pennsylvania Railroad | | | 1889 | 1891 | Central Railroad of Pennsylvania |
| Central Pennsylvania Railroad (Eastern Extension) | | | 1890 | 1891 | Central Railroad of Pennsylvania |
| Central Pennsylvania and Western Railroad | | PRR | 1893 | 1902 | Susquehanna, Bloomsburg, and Berwick Railroad |
| Central Trunk Railway | | NYC | 1868 | 1909 | Jamestown, Franklin and Clearfield Railroad |
| Chambersburg and Gettysburg Railroad | | | 1890 | | |
| Chambersburg, Greencastle and Hagerstown Railroad | | PRR | 1853 | 1859 | Franklin Railroad |
| Chapman and Lehigh Railway | | DL&W | 1881 | 1882 | Bangor and Portland Railway |
| Chartiers Railway | | PRR | 1867 | 1907 | Pittsburgh, Cincinnati, Chicago and St. Louis Railway |
| Chartiers Connecting Railroad | | PRR | 1881 | 1899 | Chartiers Railway |
| Chartiers and Mansfield Valley Railway | | PLE/ PRR | 1880 | 1881 | Pittsburgh, Chartiers and Youghiogheny Railway |
| Chartiers Southern Railway | | MGA | 1906 | 1929 | Monongahela Railway |
| Chartiers Valley Railroad | | PRR | 1853 | 1866 | Chartiers Railway |
| Cheat Haven Railroad | | B&O | 1902 | 1907 | Fairmont, Morgantown and Pittsburg Railroad |
| Cheat Haven and Bruceton Railroad | | B&O | 1911 | 1965 | N/A |
| Cheat River Railroad | | B&O | 1896 | 1907 | Fairmont, Morgantown and Pittsburg Railroad |
| Cherry Grove Railroad | | | 1884 | 1894 | Tionesta Valley Railway |
| Cherry Springs Railroad | | B&O | 1893 | 1893 | Buffalo and Susquehanna Railroad |
| Cherry Tree and Dixonville Railroad | | NYC/ PRR | 1903 | 1970 | Penn Central Transportation Company |
| Chesapeake and Ohio Railway | CO | | 1987 | 1987 | CSX Transportation |
| Chester Creek Railroad | | PRR | 1866 | 1917 | Philadelphia, Baltimore and Washington Railroad |
| Chester and Delaware River Railroad | | RDG | 1871 | 1923 | Reading Company |
| Chester Valley Railroad | | RDG | 1850 | 1888 | Philadelphia and Chester Valley Railroad |
| Chester Valley Railway | CHTS | | 1996 | 1997 | Penn Eastern Rail Lines |
| Chestnut Hill Railroad | | RDG | 1848 | 1948 | Reading Company |
| Chestnut Ridge Railroad of Pennsylvania | | | 1898 | 1902 | Chestnut Ridge Railway |
| Chestnut Ridge Railway | CHR | | 1902 | 2003 | Chestnut Ridge Railroad | Owned by New Jersey Zinc and successors from 1907 |
| Cheswick and Harmar Railroad | CHH | | 1901 | 1972 | N/A | Formerly owned by Duquesne Light |
| Clarion and Jefferson Railroad | | | 1904 | 1904 | Pittsburgh, Summerville and Clarion Railroad |
| Clarion River Railway | | | 1889 | 1948 | N/A |
| Clarion and Summerville Railroad | | | 1900 | 1901 | Clarion, Summerville and Pittsburgh Railroad |
| Clarion, Summerville and Pittsburgh Railroad | | | 1901 | 1903 | |
| Clearfield and Jefferson Railway | | PRR | 1885 | 1889 | Bell's Gap Railroad |
| Clearfield and Mahoning Railway | | B&O | 1892 | | | Still exists as a nonoperating subsidiary of R.J. Corman Railroad/Pennsylvania Lines |
| Clearfield Southern Railroad | | NYC | 1898 | 1905 | Beech Creek Extension Railroad |
| Cleveland, Painesville and Ashtabula Railroad | | NYC | 1854 | 1868 | Lake Shore Railway |
| Cleveland and Pittsburgh Railroad | | PRR | 1850 | 1976 | Consolidated Rail Corporation |
| Coal Glen Railroad | | | 1889 | | |
| Colebrook Valley Railroad | | PRR | 1881 | 1886 | Cornwall and Lebanon Railroad |
| Colebrookdale Railroad | | RDG | 1865 | 1945 | Reading Company |
| Columbia Bank | | PRR | 1852 | 1864 | Columbia Bridge Company |
| Columbia Bank and Bridge Company | | PRR | 1837 | 1852 | Columbia Bank |
| Columbia Bridge Company | | PRR | 1864 | 1871 | Pennsylvania Railroad |
| Columbia Bridge Company | | PRR | 1835 | 1837 | Columbia Bank and Bridge Company |
| Columbia and Maryland Line Railroad | | PRR | 1860 | 1864 | Columbia and Port Deposit Railroad |
| Columbia and Port Deposit Railroad | | PRR | 1864 | 1890 | Columbia and Port Deposit Railway |
| Columbia and Port Deposit Railway | | PRR | 1890 | 1916 | Philadelphia, Baltimore and Washington Railroad |
| Columbus and Erie Railroad | | ERIE | 1905 | 1941 | Erie Railroad |
| Conemaugh and Black Lick Railroad | CBL | | 1923 | | Lehigh Valley Rail Management |
| Conewango Valley Railroad | | NYC | 1870 | 1870 | Dunkirk, Warren and Pittsburgh Railway |
| Confluence and Oakland Railroad | | B&O | 1890 | 1941 | N/A |
| Confluence and State Line Railroad | | B&O | 1889 | 1890 | Confluence and Oakland Railroad |
| Connecting Railway | | PRR | 1863 | 1976 | Consolidated Rail Corporation |
| Connection Railroad | | NYC | 1870 | 1871 | Junction Railroad |
| Connellsville Central Railroad | | MGA | 1902 | 1905 | Connellsville and Monongahela Railway |
| Connellsville and Monongahela Railway | | MGA | 1905 | | N/A |
| Connellsville and State Line Railway | | WM | 1910 | 1917 | Western Maryland Railway |
| Connequenessing Valley Railroad | | B&LE | 1881 | 1882 | West Penn and Shenango Connecting Railroad |
| Consolidated Rail Corporation | CR | | 1976 | 1999 | CSX Transportation, Norfolk Southern Railway |
| Continental Coal Company | | DL&W | 1860 | 1865 | Keyser Valley Railroad |
| Corning, Cowanesque and Antrim Railway | | NYC | 1873 | 1892 | Fall Brook Railway |
| Cornwall Railroad | CWL | RDG | 1870 | 1968 | Reading Company |
| Cornwall and Lebanon Railroad | C&L | PRR | 1882 | 1918 | Pennsylvania Railroad |
| Cornwall and Mount Hope Railroad | | RDG | 1883 | 1886 | Cornwall Railroad |
| Corry and State Line Railroad | | PRR | 1879 | 1879 | Buffalo, Chautauqua Lake and Pittsburgh Railway |
| Coudersport and Pine Creek Railroad | | | 1889 | 1895 | Coudersport and Port Allegany Railroad |
| Coudersport and Port Allegany Railroad | CPA | | 1882 | 1970 | N/A | Owned by Wellsville, Addison and Galeton Railroad |
| Coudersport and Wellsboro Railroad | | B&O | 1892 | 1894 | Buffalo and Susquehanna Railroad |
| Cowanesque Valley Railroad | | NYC | 1869 | 1874 | Corning, Cowanesque and Antrim Railway |
| Crane Railroad | | LNE | 1905 | 1914 | Lehigh and New England Railroad |
| Cresson Railroad | | PRR | 1891 | 1891 | Cambria and Clearfield Railroad |
| Cresson and Clearfield County and New York Short Route Railroad | | PRR | 1882 | 1894 | Cresson and Irvona Railroad |
| Cresson and Irvona Railroad | | PRR | 1894 | 1903 | Cambria and Clearfield Railway |
| Cross Cut Railroad | | PRR | 1864 | 1867 | Buffalo, Corry and Pittsburgh Railroad |
| Cross Fork Railroad | | B&O | 1893 | 1893 | Buffalo and Susquehanna Railroad |
| Cumberland Valley Railroad | | PRR | 1831 | 1919 | Pennsylvania Railroad |
| Cumberland Valley and Waynesboro Railroad | | PRR | 1901 | 1906 | Cumberland Valley Railroad |
| Curwensville and Bower Railroad | | NYC | 1903 | 1905 | Beech Creek Extension Railroad |
| Dahoga and Highland Railroad | | | | | |
| Dallastown Railroad | | | 1898 | 1902 | Maryland and Pennsylvania Railroad |
| Danville, Hazleton and Wilkes-Barre Railroad | | PRR | 1867 | 1878 | Sunbury, Hazleton and Wilkesbarre Railway |
| Danville and Pottsville Railroad | | PRR | 1826 | 1851 | Philadelphia and Sunbury Railroad |
| Darlington Cannel Coal Railroad | | PLE/ PRR | 1852 | 1855 | Pittsburgh, Lisbon and Western Railroad, Pittsburgh, Marion and Chicago Railway |
| Dauphin and Susquehanna Coal Company | | RDG | 1838 | 1859 | Schuylkill and Susquehanna Railroad |
| Dawson, Broadford and Mount Pleasant Railroad | | PLE | 1881 | 1882 | Pittsburgh, McKeesport and Youghiogheny Railroad |
| Delaware and Chester County Railroad | | B&O | 1867 | 1869 | Wilmington and Western Railroad |
| Delaware and Cobb's Gap Railroad | | DL&W | 1849 | 1853 | Delaware, Lackawanna and Western Railroad |
| Delaware and Hudson Company | | D&H | 1899 | 1930 | Delaware and Hudson Railroad |
| Delaware and Hudson Railroad | D&H | D&H | 1930 | 1968 | Delaware and Hudson Railway |
| Delaware and Hudson Canal Company | | D&H | 1826 | 1899 | Delaware and Hudson Company |
| Delaware, Lackawanna and Western Railroad | DL&W, DLW | DL&W | 1853 | 1960 | Erie–Lackawanna Railroad |
| Delaware, Lehigh, Schuylkill and Susquehanna Railroad | | LV | 1846 | 1853 | Lehigh Valley Railroad |
| Delaware River Railroad and Bridge Company | | PRR | 1896 | 1954 | Penndel Company |
| Delaware River and Lancaster Railroad | | | 1868 | 1893 | N/A |
| Delaware River and Union Railroad | DR&U | | 1902 | 1941 | N/A | Owned by Sunoco |
| Delaware and Slatington Railroad | | LNE | 1881 | 1882 | Pennsylvania, Slatington and New England Railroad |
| Delaware, Susquehanna and Schuylkill Railroad | | LV | 1890 | 1949 | Lehigh Valley Railroad |
| Delaware Valley Railroad | | | 1899 | 1903 | Delaware Valley Railway |
| Delaware Valley Railway | DV | | 1994 | 1999 | Brandywine Valley Railroad |
| Delaware Valley Railway | | | 1904 | 1937 | N/A |
| Delaware Valley Railway | | | | 1899 | Delaware Valley, Hudson and Lehigh Railroad |
| Delaware Valley, Hudson and Lehigh Railroad | | | 1898 | 1899 | Delaware Valley Railroad |
| Delaware Western Railroad | | B&O | 1877 | 1883 | Baltimore and Philadelphia Railroad |
| Dent's Run Railroad | | | 1903 | | N/A |
| Diamond Valley Railroad | | | 1886 | 1891 | Newport and Shermans Valley Railroad | Founder David Gring relocated and began a new railroad when the DVRR folded. |
| Dillsburg and Mechanicsburg Railroad | | PRR | 1871 | 1906 | Cumberland Valley Railroad |
| Doe Run and White Clay Creek Railroad | | PRR | 1868 | 1870 | Pennsylvania and Delaware Railroad |
| Donora Southern Railroad | DSO | | 1902 | | N/A |
| Downingtown and Lancaster Railroad | | PRR | 1888 | 1903 | Pennsylvania Railroad |
| Dunkirk, Allegheny Valley and Pittsburgh Railroad | | NYC | 1873 | 1914 | New York Central Railroad |
| Dunkirk, Warren and Pittsburgh Railway | | NYC | 1870 | 1873 | Dunkirk, Allegheny Valley and Pittsburgh Railroad |
| Eagles Mere Railroad | | | 1891 | 1922 | Eagles Mere Railway |
| Eagles Mere Railway | | | 1922 | 1927 | N/A |
| East Berlin Railroad | EB | | 1914 | 1939 | N/A |
| East Berlin Railway | | | 1903 | 1914 | East Berlin Railroad |
| East Brandywine Railroad | | PRR | 1854 | 1860 | East Brandywine and Waynesburg Railroad |
| East Brandywine and Waynesburg Railroad | | PRR | 1860 | 1888 | Downingtown and Lancaster Railroad |
| East Broad Top Railroad and Coal Company | | | 1856 | 1956 | N/A | Continued as a tourist railroad |
| East Mahanoy Railroad | | RDG | 1854 | 1951 | Reading Company |
| East Mahanoy and Hazleton Railroad | EMHR | | 1992 | 1996 | Reading Blue Mountain and Northern Railroad |
| East Penn Railways | EPRY | | 1995 | 2007 | East Penn Railroad |
| East Pennsylvania Railroad | | RDG | 1857 | 1976 | Consolidated Rail Corporation |
| East Stroudsburg and Matamoras Railroad | | | | 1899 | Delaware Valley, Hudson and Lehigh Railroad |
| Eastern Railroad | | | 1901 | 1925 | Monongahela Connecting Railroad |
| Easton and Northern Railroad | | LV | 1889 | 1949 | Lehigh Valley Railroad |
| Easton and Western Railroad | | CNJ | 1914 | 1944 | Central Railroad of Pennsylvania |
| Ebensburg and Black Lick Railroad | | PRR | 1893 | 1903 | Cambria and Clearfield Railway |
| Ebensburg and Cresson Railroad | | PRR | 1859 | 1891 | Cresson Railroad |
| Eddystone and Delaware River Railroad | | PRR | 1899 | 1918 | Philadelphia, Baltimore and Washington Railroad |
| Elk and Highland Railroad | | | 1898 | 1913 | Elk and Highland Railway |
| Elk and Highland Railway | | | 1913 | 1913 | Tionesta Valley Railway |
| Elk Lick Coal, Lumber and Iron Company | | B&O | 1868 | 1871 | Salisbury and Baltimore Railroad and Coal Company |
| Ellwood Connecting Railroad | | PLE | 1892 | 1911 | Beaver and Ellwood Railroad |
| Ellwood Short Line Railroad | | B&O | 1890 | 1912 | Pittsburgh and Western Railroad |
| Ellwood Southern Railroad | | PLE | 1899 | 1899 | Beaver and Ellwood Railroad |
| Elmira and Williamsport Railroad | | PRR | 1860 | 1969 | Penndel Company |
| Emlenton and Shippenville Railroad | | B&O | 1875 | 1877 | Emlenton, Shippenville and Clarion Railway |
| Emlenton, Shippenville and Clarion Railway | | B&O | 1877 | 1881 | Pittsburgh, Bradford and Buffalo Railway |
| Emporium and Mount Jewett Railroad | | PS&N | 1895 | 1897 | Mount Jewett, Clermont and Northern Railroad |
| Emporium and Rich Valley Railroad | | | 1891 | | |
| Engelside Railroad | | PRR | 1892 | 1902 | Connecting Railway |
| Enterprise Railroad | | RDG | 1865 | 1870 | Mahanoy and Shamokin Railroad |
| Erie Railroad | ERIE | ERIE | 1895 | 1960 | Erie–Lackawanna Railroad |
| Erie Railway | | ERIE | 1861 | 1878 | New York, Lake Erie and Western Railroad |
| Erie–Lackawanna Railroad | EL | | 1960 | 1968 | Erie Lackawanna Railway |
| Erie Lackawanna Railway | EL | | 1968 | 1976 | Consolidated Rail Corporation |
| Erie and North East Railroad | | NYC, PRR | 1842 | 1867 | Buffalo and Erie Railroad, Erie and Pittsburgh Railroad |
| Erie and Ohio Rail Road | | NYC | 1849 | 1854 | Cleveland, Painesville and Ashtabula Railroad | Built by the Franklin Canal Company |
| Erie and Pittsburgh Railroad | | PRR | 1858 | 1976 | Consolidated Rail Corporation |
| Erie, Shenango and Pittsburgh Railway | | B&LE | 1886 | 1888 | Pittsburgh, Shenango and Lake Erie Railroad |
| Erie and State Line Railroad | | NKP | 1887 | 1887 | New York, Chicago and St. Louis Railroad |
| Erie Terminal Railroad | | B&LE | 1891 | 1893 | Pittsburgh, Shenango and Lake Erie Railroad |
| Erie and Wyoming Valley Railroad | | ERIE | 1882 | 1941 | Erie Railroad |
| Eriton Railroad | | ERIE | 1906 | 1933 | N/A |
| Etna and Montrose Railroad | | | 1896 | 1961 | N/A |
| Fair Hill Railroad | | PRR | 1892 | 1902 | Connecting Railway |
| Fairmont, Morgantown and Pittsburg Railroad | | B&O | 1893 | 1989 | CSX Transportation |
| Fall Brook Railway | | NYC | 1892 | 1909 | Geneva, Corning and Southern Railroad |
| Falls Creek Railroad | | | 1889 | 1897 | Reynoldsville and Falls Creek Railroad |
| Farmers' Railroad | | PRR | 1862 | 1868 | Warren and Franklin Railway |
| Fayette County Railroad | | B&O | 1857 | 1912 | Baltimore and Ohio Railroad in Pennsylvania |
| Forest City and State Line Railroad | | O&W | 1889 | 1889 | Ontario, Carbondale and Scranton Railway |
| Foxburg, Kane and Bradford Railroad | | B&O | 1879 | 1881 | Pittsburgh, Bradford and Buffalo Railway |
| Foxburg, St. Petersburg and Clarion Railroad | | B&O | 1877 | 1881 | Pittsburgh, Bradford and Buffalo Railway |
| Frankford Creek Railroad | | PRR | 1890 | 1891 | Kensington and Tacony Railroad |
| Frankford and Holmesburg Railroad | | PRR | 1863 | 1890 | Bustleton Railroad |
| Franklin Railroad | | PRR | 1859 | 1865 | Cumberland Valley Railroad |
| Franklin Railroad | | PRR | 1832 | 1850 | Chambersburg, Greencastle and Hagerstown Railroad |
| Franklin Canal Company | | NYC | 1849 | 1854 | Cleveland, Painesville and Ashtabula Railroad |
| Franklin and Clearfield Railroad | | NYC | 1902 | 1909 | Jamestown, Franklin and Clearfield Railroad |
| Gaffney and James City Railroad | | B&O | 1913 | 1940 | N/A |
| Gaines and State Line Railroad | | PRR | 1875 | 1876 | Geneva, Hornellsville and Pine Creek Railway |
| Galeton and Eastern Railroad | | B&O | 1898 | 1901 | Buffalo and Susquehanna Railroad |
| Galeton, South Branch and Germania Railroad | | | | | |
| Garfield and Cherry Grove Railroad | | | 1882 | 1884 | Cherry Grove Railroad |
| Geneva, Corning and Southern Railroad | | NYC | 1909 | 1914 | New York Central Railroad |
| Geneva, Hornellsville and Pine Creek Railway | | PRR | 1876 | 1879 | Lake Ontario Southern Railway |
| Gettysburg Railroad (1976-1996) | GETY | | 1976 | 1996 | Gettysburg Railway |
| Gettysburg Railroad | | WM | 1853 | 1870 | Susquehanna, Gettysburg and Potomac Railway |
| Gettysburg Railway | GBRY | | 1996 | 2001 | Gettysburg and Northern Railroad |
| Gettysburg and Harrisburg Railroad | | RDG | 1882 | 1891 | Gettysburg and Harrisburg Railway |
| Gettysburg and Harrisburg Railway | | RDG | 1891 | 1945 | Reading Company |
| Girardville Railroad | | PRR | 1892 | 1893 | Pennsylvania Schuylkill Valley Railroad |
| Glen Hazel and Shawmut Railroad | | | | 1893 | Ketner, St. Mary's and Shawmut Railroad |
| Glenwood Railroad | | B&O | 1896 | 1912 | Baltimore and Ohio Railroad in Pennsylvania |
| Good Spring Railroad | | RDG | 1863 | 1871 | Lebanon and Tremont Railroad |
| Grassy Island Railroad | | ERIE | 1887 | 1936 | Moosic Mountain and Carbondale Railroad |
| Grays Run Railway | | LV | 1903 | 1903 | Susquehanna and New York Railroad |
| Greenlick Railway | | | 1892 | | N/A |
| Greenlick Narrow Gauge Railway | | | 1874 | 1892 | Greenlick Railway |
| Hanover Branch Railroad | | WM | 1849 | 1874 | Hanover Junction, Hanover and Gettysburg Railroad |
| Hanover Junction, Hanover and Gettysburg Railroad | | WM | 1874 | 1886 | Baltimore and Harrisburg Railway |
| Hanover Junction and Susquehanna Railroad | | RDG | 1876 | 1881 | Reading, Marietta and Hanover Railroad |
| Hanover and Newport Railroad | | DL&W | 1894 | 1909 | Delaware, Lackawanna and Western Railroad |
| Hanover and York Railroad | | PRR | 1873 | 1897 | York, Hanover and Frederick Railroad |
| Harrisburg, Portsmouth, Mountjoy and Lancaster Railroad | | PRR | 1835 | 1917 | Pennsylvania Railroad |
| Harrisburg and Potomac Railroad | | RDG | 1871 | 1890 | Harrisburg and Shippensburg Railroad |
| Harrisburg and Shippensburg Railroad | | RDG | 1890 | 1890 | Philadelphia, Harrisburg and Pittsburgh Railroad |
| Harrisburg Terminal Railroad | | RDG | 1889 | 1890 | Philadelphia, Harrisburg and Pittsburgh Railroad |
| Hazleton Railroad | | LV | 1865 | 1868 | Lehigh Valley Railroad |
| Hazleton Coal Company | | LV | 1836 | 1865 | Hazleton Railroad |
| Hempfield Railroad | | B&O | 1850 | 1871 | Wheeling, Pittsburgh and Baltimore Railroad |
| Hickory Valley Railroad | | | 1887 | 1938 | N/A |
| Hicks Run Railroad | | | 1905 | | |
| Hollidaysburg, Bedford and Cumberland Railroad | | PRR | 1911 | 1914 | Pennsylvania Railroad |
| Hooverhurst and South Western Railroad | | NYC | 1902 | 1913 | Beech Creek Extension Railroad |
| Howard Coal and Iron Company | | D&H | 1864 | 1867 | Union Coal Company |
| Hunter's Run and Slate Belt Railroad | | RDG | 1891 | 1910 | Gettysburg and Harrisburg Railway |
| Huntingdon and Broad Top Mountain Railroad and Coal Company | H&BT | | 1852 | 1954 | Everett Railroad, Pennsylvania Railroad |
| Indian Creek Valley Railway | | B&O | 1902 | 1972 | N/A |
| Ironton Railroad | IRN | LV/ RDG | 1859 | 1976 | Consolidated Rail Corporation |
| ISS Rail, Inc. | ISSR | | 1993 | | New Castle Industrial Railroad |
| Jackson Coal Railroad | | NYC | 1883 | 1909 | Jamestown, Franklin and Clearfield Railroad |
| Jamestown and Franklin Railroad | | NYC | 1862 | 1909 | Jamestown, Franklin and Clearfield Railroad |
| Jamestown, Franklin and Clearfield Railroad | | NYC | 1909 | 1915 | New York Central Railroad |
| Jeddo and Carbon County Railroad | | LV | 1854 | 1856 | Lehigh and Luzerne Railroad |
| Jefferson Railroad | | ERIE | 1851 | 1941 | Erie Railroad |
| Jefferson and Allegheny Railway | | B&O | 1894 | 1898 | Allegheny and Western Railway |
| Jersey Shore and Antes Fort Railroad | | | 1904 | | |
| Jersey Shore, Pine Creek and Buffalo Railway | | NYC | 1870 | 1884 | Pine Creek Railway |
| Johnsonburg Railroad | | PRR | 1887 | 1928 | Pennsylvania Railroad |
| Johnsonburgh Railroad | | B&O | 1887 | 1888 | Johnsonburgh and Bradford Railroad |
| Johnsonburgh and Bradford Railroad | | B&O | 1888 | 1907 | Buffalo, Rochester and Pittsburgh Railway |
| Johnsonburg, Kane, Warren and Irvine Railroad | JKWI | | 1982 | 1985 | Allegheny Railroad |
| Johnstown and Stony Creek Railroad | J&SC, JSC | | 1888 | 1983 | N/A |
| Jones Lake Railroad | | ERIE | 1887 | 1894 | Erie and Wyoming Valley Railroad |
| Junction Railroad | | PRR | 1860 | 1908 | Pennsylvania Railroad |
| Junction Railroad | | NYC | 1870 | 1871 | Jamestown and Franklin Railroad |
| Juniata and Southern Railroad | | | 1913 | 1917 | N/A |
| Kane Railroad | | | 1899 | 1931 | N/A | Operated by Mount Jewett, Kinzua and Riterville Railroad |
| Kane and Elk Railroad | | | 1895 | 1946 | N/A |
| Karns City and Butler Railroad | | B&O | 1873 | 1881 | Pittsburgh and Western Railroad |
| Keating and Smethport Railroad | | | 1899 | 1931 | N/A | Operated by Mount Jewett, Kinzua and Riterville Railroad |
| Kendall and Eldred Railroad | | | 1877 | 1893 | N/A | Operated by Western New York and Pennsylvania Railroad |
| Kensington and Tacony Railroad | | PRR | 1884 | 1902 | Connecting Railway |
| Kersey Railroad | | PS&N | 1900 | 1947 | N/A |
| Ketner, Elbon and Shawmut Railroad | | | 1892 | 1893 | Ketner, St. Mary's and Shawmut Railroad |
| Ketner and Kay Fork Railway | | | 1901 | | |
| Ketner, St. Mary's and Shawmut Railroad | | | 1893 | | |
| Keyser Valley Railroad | | DL&W | 1865 | 1865 | Delaware, Lackawanna and Western Railroad |
| Kinzua Railroad | | PRR | 1911 | 1911 | Western New York and Pennsylvania Railway |
| Kinzua Railway | | PRR | 1881 | 1911 | Kinzua Railroad |
| Kinzua Hemlock Railroad | | | 1890 | 1936 | N/A | Operated by Valley Railroad |
| Kinzua and Tiona Railroad | | | 1897 | | |
| Kinzua Valley Railroad | | PRR | 1889 | 1911 | Kinzua Railroad |
| Kishacoquillas Valley Railroad | | | 1892 | 1940 | N/A |
| Kittanning Run Railroad | | | 1905 | | |
| Knox and Kane Railroad | KKRR | | 1982 | 2006 | N/A |
| Kushequa Railroad | | B&O | 1898 | 1931 | Mount Jewett, Kinzua and Riterville Railroad |
| Lackawanna Railway | LRWY | | 1991 | 1993 | Delaware–Lackawanna Railroad |
| Lackawanna and Bloomsburg Railroad | | DL&W | 1852 | 1873 | Delaware, Lackawanna and Western Railroad |
| Lackawanna and Montrose Railroad | | DL&W | 1889 | 1928 | Delaware, Lackawanna and Western Railroad |
| Lackawanna Valley Railroad | LVAL | | 1985 | 1993 | Delaware–Lackawanna Railroad |
| Lackawanna and Western Railroad | | DL&W | 1851 | 1853 | Delaware, Lackawanna and Western Railroad |
| Lackawanna and Wyoming Valley Railroad | L&WV | DL&W | 1901 | 1960 | Lackawanna and Wyoming Valley Railway | Electric until 1953 |
| Lackawanna and Wyoming Valley Railway | L&WV, LWV | DL&W | 1959 | 1976 | Consolidated Rail Corporation |
| Lackawaxen and Stourbridge Railroad | LASB | | 1976 | 1989 | Stourbridge Railroad |
| Lake Erie, Franklin and Clarion Railroad | LEF | | 1913 | 1992 | N/A |
| Lake Ontario Southern Railway | | PRR | 1879 | 1882 | Sodus Bay and Southern Railway (NY) | Sold at foreclosure; no property in Pennsylvania |
| Lake Shore Railway | | NYC | 1868 | 1869 | Lake Shore and Michigan Southern Railway |
| Lake Shore and Michigan Southern Railway | | NYC | 1869 | 1914 | New York Central Railroad |
| Lancaster and Northern Railroad | | | 1906 | | | Never operated revenue service. |
| Lancaster Northern Railway | LANO | | 1995 | 1997 | Penn Eastern Rail Lines |
| Lancaster, Oxford and Southern Railroad | | | 1890 | 1912 | Lancaster, Oxford and Southern Railway |
| Lancaster, Oxford and Southern Railway | | | 1912 | 1918 | N/A |
| Lancaster and Quarryville Railroad | | PRR | 1904 | 1915 | Pennsylvania Railroad |
| Lancaster and Reading Narrow Gauge Railroad | | PRR | 1871 | 1904 | Lancaster and Quarryville Railroad |
| Latrobe and Ligonier Railroad | | | 1853 | 1871 | Ligonier Valley Railroad |
| Lawrence Railroad | | PRR | 1865 | 1887 | Youngstown, Lawrence and Pittsburgh Railroad |
| Lawrence Railroad and Transportation Company | | PRR | 1864 | 1865 | Lawrence Railroad |
| Lebanon Belt Railway | | PRR | 1889 | 1891 | Cornwall and Lebanon Railroad |
| Lebanon and Tremont Railroad | | RDG | 1871 | 1871 | Philadelphia and Reading Railroad |
| Lebanon Valley Railroad | | RDG | 1850 | 1858 | Philadelphia and Reading Railroad |
| Leetonia Railway | | | 1899 | | |
| Lehigh and Delaware Railroad | | LNE | 1904 | 1904 | Lehigh and New England Railroad |
| Lehigh and Delaware Gap Railroad | | CNJ | 1857 | 1867 | Lehigh Coal and Navigation Company |
| Lehigh and Hudson River Railway | L&HR, LHR | | 1889 | 1976 | Consolidated Rail Corporation |
| Lehigh and Lackawanna Railroad | | LNE | 1864 | 1904 | Lehigh and Delaware Railroad |
| Lehigh Luzerne Railroad | | LV | 1857 | 1868 | Lehigh Valley Railroad |
| Lehigh and Luzerne Railroad | | LV | 1856 | 1857 | Lehigh Luzerne Railroad |
| Lehigh and Mahanoy Railroad | | LV | 1862 | 1866 | Lehigh Valley Railroad |
| Lehigh and New England Railroad | LNE | LNE | 1895 | 1961 | Lehigh and New England Railway |
| Lehigh and New England Railway | LNE | CNJ | 1961 | 1976 | Consolidated Rail Corporation |
| Lehigh Coal and Navigation Company | | CNJ | 1837 | 1978 | Consolidated Rail Corporation |
| Lehigh Valley Railroad | LV | LV | 1853 | 1976 | Consolidated Rail Corporation |
| Lewisburg and Buffalo Valley Railroad | | | 1897 | 1906 | N/A |
| Lewisburg, Centre and Spruce Creek Railroad | | PRR | 1853 | 1879 | Lewisburg and Tyrone Railroad |
| Lewisburg and Tyrone Railroad | | PRR | 1880 | 1913 | Lewisburg and Tyrone Railway |
| Lewisburg and Tyrone Railway | | PRR | 1913 | 1915 | Pennsylvania Railroad |
| Liggett's Gap Railroad | | DL&W | 1832 | 1851 | Lackawanna and Western Railroad |
| Ligonier Valley Railroad | LGV | | 1871 | 1952 | N/A |
| Little Saw Mill Run Railroad | | P&WV | 1850 | 1897 | West Side Belt Railroad |
| Little Schuylkill Navigation, Railroad and Coal Company | | RDG | 1829 | 1952 | Reading Company |
| Little Schuylkill and Susquehanna Railroad | | RDG | 1835 | 1849 | Catawissa, Williamsport and Erie Railroad |
| Littlestown Railroad | | PRR | 1854 | 1892 | Hanover and York Railroad |
| Locust Gap Improvement Company | | RDG | 1854 | 1864 | Philadelphia and Reading Railroad |
| Lorberry Creek Railroad | | RDG | 1843 | 1871 | Lebanon and Tremont Railroad |
| Loyalhanna and Youghiogheny Railroad | | NYC | 1894 | 1895 | Pittsburgh and Eastern Railroad |
| Loyalsock Railroad | | LV | 1884 | 1949 | Lehigh Valley Railroad |
| Lykens Valley Railroad and Coal Company | | PRR | 1830 | 1956 | Penndel Company |
| Mahanoy and Broad Mountain Railroad | | RDG | 1860 | 1870 | Mahanoy and Shamokin Railroad |
| Mahanoy and Shamokin Improvement Company | | RDG | 1850 | 1856 | Trevorton Coal and Railroad Company |
| Mahanoy and Shamokin Railroad | | RDG | 1870 | 1871 | Philadelphia and Reading Railroad |
| Mahanoy Valley Railroad | | RDG | 1868 | 1870 | Mahanoy and Shamokin Railroad |
| Mahoning and Shenango Valley Railway | | NYC | 1963 | 1976 | Consolidated Rail Corporation |
| Mahoning State Line Railroad | | PLE | 1894 | | | Still exists as a nonoperating subsidiary of CSX Transportation |
| Mahoning Valley Railroad | | B&O | 1890 | 1967 | Buffalo, Rochester and Pittsburgh Railway |
| Main Line of Public Works | | PRR | 1828 | 1857 | Pennsylvania Railroad |
| Manns Choice and Hyndman Railroad | | PRR | 1894 | 1894 | Pennsylvania Midland Railroad |
| Manufacturers Railroad | | RDG | 1870 | 1873 | Philadelphia and Reading Railroad |
| Manufacturers Terminal Railway | | | | | |
| Mapleton and Rocky Ridge Railway | | | 1891 | | |
| Marginal Railroad | | | 1880 | 1890 | Pennsylvania Company |
| Martins Creek Railroad | | PRR | 1885 | 1896 | Belvidere Delaware Railroad |
| Maryland Central Railway | | | 1888 | 1891 | Baltimore and Lehigh Railroad |
| Maryland and Pennsylvania Railroad | M&PA, MPA | | 1901 | | | Still exists as a nonoperating subsidiary of the York Railway |
| Masontown and New Salem Railroad | | MGA | 1899 | 1905 | Connellsville and Monongahela Railway |
| Mauch Chunk Railroad | | | 1826 | 1872 | Continued as a tourist railroad |
| McKean and Buffalo Railroad | | PRR | 1874 | 1911 | Western New York and Pennsylvania Railway |
| McKees Rocks Railroad | | | 1899 | 1899 | Pittsburgh, Allegheny and McKees Rocks Railroad |
| McKeesport and Belle Vernon Railroad | | PLE | 1886 | 1890 | Pittsburgh, McKeesport and Youghiogheny Railroad |
| McKeesport and Bessemer Railroad | | PRR | 1888 | 1894 | Pittsburgh, Virginia and Charleston Railway |
| McKeesport Terminal Railroad | | | 1896 | | |
| McLaughlin Line Railroad | MCLR | | 1985 | | N/A |
| McLaughlin's and Saw Mill Run Railway | | PLE/ PRR | 1881 | 1881 | Pittsburgh, Chartiers and Youghiogheny Railway |
| Mead Run Railroad | | | 1897 | 1931 | N/A | Operated by Mount Jewett, Kinzua and Riterville Railroad |
| Meadow Lands and Zediker Railroad | | PRR | 1903 | 1907 | Chartiers Railway |
| Meadville Railroad | | ERIE | 1857 | 1858 | Atlantic and Great Western Railroad |
| Meadville Railway | | B&LE | 1880 | 1884 | Meadville and Linesville Railway |
| Meadville, Conneaut Lake and Linesville Railroad | | B&LE | 1891 | 1948 | Bessemer and Lake Erie Railroad |
| Meadville and Linesville Railway | | B&LE | 1884 | 1891 | Meadville, Conneaut Lake and Linesville Railroad |
| Medix Run Railroad | | B&O | 1886 | 1905 | Susquehanna and Southern Railroad |
| Mercer Valley Railroad | | | 1900 | | |
| Mercersburg Railway | MERW | | 1978 | 1980 | Consolidated Rail Corporation |
| Middle Creek Railroad | | PRR | 1865 | 1870 | Sunbury and Lewistown Railroad |
| Middletown and Hummelstown Railroad | | RDG | 1888 | 1923 | Reading Company |
| Midland Pennsylvania Railroad | | | 1910 | | |
| Midland Terminal Company | MDLR | | 1983 | 2003 | Pennsylvania Southwestern Railroad |
| Midway and Oakdale Railway | | PRR | 1900 | 1909 | Pittsburgh, Cincinnati, Chicago and St. Louis Railway |
| Mifflin and Centre County Railroad | | PRR | 1860 | 1896 | Sunbury and Lewistown Railroad |
| Mill Creek Railroad | | PRR | 1865 | 1865 | Reno, Oil Creek and Pithole Railway |
| Mill Creek and Mine Hill Navigation and Railroad Company | | RDG | 1828 | 1950 | Reading Company |
| Mill Creek Valley Railroad | | PS&N | 1899 | 1899 | Pittsburg, Shawmut and Northern Railroad |
| Millersburg Railroad | | PRR | 1899 | 1903 | Cambria and Clearfield Railway |
| Millville and North Mountain Railroad | | PRR | 1886 | 1887 | Wilkesbarre and Western Railway |
| Milton and North Mountain Railroad | | PRR | 1885 | 1887 | Wilkesbarre and Western Railway |
| Mine Hill and Schuylkill Haven Railroad | | RDG | 1829 | 1951 | Reading Company |
| Mineral Railroad and Mining Company | | | 1865 | | |
| Miramar Iron Company | | RDG | 1870 | 1871 | Harrisburg and Potomac Railroad |
| Mocanaqua and Eastern Railroad | | | | | |
| Monessen Southwestern Railway | | | 1912 | | |
| Monongahela Railroad | | MGA | 1900 | 1915 | Monongahela Railway |
| Monongahela Railway | MGA | MGA | 1915 | 1993 | Consolidated Rail Corporation |
| Monongahela Connecting Railroad | MGAC, MCRR | | 1885 | 2002 | Allegheny Valley Railroad |
| Monongahela and Ohio Railroad | | MGA | 1912 | 1933 | Monongahela Railway |
| Monongahela River and Streets Run Railroad | | PRR | 1892 | 1894 | Pittsburgh, Virginia and Charleston Railway |
| Monongahela Southern Railroad | | | 1897 | 1937 | Union Railroad |
| Monongahela Valley Railroad | | PRR | 1867 | 1870 | Pittsburgh, Virginia and Charleston Railway |
| Monongahela and Washington Railroad | | PRR | 1899 | 1904 | Pennsylvania Railroad |
| Mont Alto Railroad | | PRR | 1871 | 1901 | Cumberland Valley and Waynesboro Railroad |
| Montour Railroad | M, MTR | MTR | 1877 | 1983 | N/A |
| Montrose Railroad | | LV | 1905 | 1949 | Lehigh Valley Railroad |
| Montrose Railway | | LV | 1869 | 1905 | Montrose Railroad |
| Moosic Mountain and Carbondale Railroad | | ERIE | 1887 | 1941 | Erie Railroad |
| Morgantown and Wheeling Railway | M&W | MGA | 1917 | 1923 | Scotts Run Railway |
| Moshannon Railroad | | PRR | 1863 | 1881 | Bald Eagle Valley Railroad |
| Moshannon and Clearfield Railroad | | PRR | 1880 | 1884 | Tyrone and Clearfield Railway |
| Mount Carmel Railroad | | RDG | 1907 | 1952 | N/A |
| Mount Carmel and Natalie Railroad | | RDG | 1891 | 1906 | Mount Carmel Railroad |
| Mount Carbon Railroad | | RDG | 1829 | 1872 | Philadelphia and Reading Railroad |
| Mount Carbon and Port Carbon Railroad | | RDG | 1842 | 1949 | Reading Company |
| Mount Eagle and Tremont Railroad | | RDG | 1853 | 1862 | Mine Hill and Schuylkill Haven Railroad |
| Mount Jewett, Clermont and Northern Railroad | | PS&N | 1897 | 1899 | Pittsburg, Shawmut and Northern Railroad |
| Mount Jewett, Kinzua and Riterville Railroad | | B&O | 1889 | 1942 | N/A |
| Mount Jewett and Smethport Railroad | | PS&N | 1892 | 1897 | Mount Jewett, Clermont and Northern Railroad |
| Mount Penn Gravity Railroad | | | 1889 | | |
| Mount Pleasant and Broad Ford Railroad | | B&O | 1870 | 1912 | Baltimore and Ohio Railroad in Pennsylvania |
| Mount Pleasant and Latrobe Railroad | | | 1881 | | |
| Mountain Laurel Railroad | MNL | | 1991 | 1996 | Pittsburg and Shawmut Railroad |
| Muncy Creek Railway | | | 1864 | 1882 | Williamsport and North Branch Railroad |
| Nanticoke Railroad | | CNJ | 1860 | 1867 | Lehigh Coal and Navigation Company |
| Nazareth and Lehigh Railway | | DL&W | 1899 | 1899 | Bangor and Portland Railway |
| Nescopec Railroad | | PRR | 1886 | 1900 | Schuylkill and Juniata Railroad |
| Nesquehoning Valley Railroad | | CNJ | 1861 | 1963 | Lehigh Coal and Navigation Company |
| New Berlin and Winfield Railroad | | | 1904 | 1916 | N/A |
| New Brighton and New Castle Railroad | | PRR | 1881 | 1887 | Youngstown, Lawrence and Pittsburgh Railroad |
| New Castle and Beaver Valley Railroad | | PRR | 1862 | 1906 | Pittsburgh, Youngstown and Ashtabula Railway |
| New Castle and Butler Railroad | | | 1881 | | |
| New Castle and Darlington Railroad | | PRR | 1856 | 1857 | Pittsburgh, New Castle and Cleveland Railroad |
| New Castle and Franklin Railroad | | PRR | 1864 | 1881 | New Castle and Oil City Railroad |
| New Castle and Oil City Railroad | | PRR | 1881 | 1882 | Oil City and Chicago Railroad |
| New Castle, Plain Grove and Butler Railroad | | | 1882 | 1882 | Oil City and Chicago Railroad |
| New Castle Northern Railway | | ERIE | 1883 | 1887 | New Castle and Shenango Valley Railroad |
| New Castle and Shenango Valley Railroad | | ERIE | 1887 | 1900 | Sharon Railway |
| New Haven and Dunbar Railroad | | | 1892 | 1955 | N/A |
| New Park and Fawn Grove Railroad | | | 1905 | 1935 | N/A | Operated by Stewartstown Railroad |
| New York Central Railroad | NYC | NYC | 1914 | 1968 | Penn Central Transportation Company |
| New York Central and Hudson River Railroad | | NYC | 1890 | 1914 | New York Central Railroad |
| New York, Chicago and St. Louis Railroad | NKP | NKP | 1887 | 1964 | Norfolk and Western Railway |
| New York, Chicago and St. Louis Railway | | NKP | 1881 | 1887 | Erie and State Line Railroad |
| New York and Erie Railroad | | ERIE | 1841 | 1861 | Erie Railway |
| New York, Lackawanna and Western Railway | | DL&W | 1880 | 1945 | Delaware, Lackawanna and Western Railroad |
| New York, Lake Erie and Western Railroad | | ERIE | 1878 | 1895 | Erie Railroad |
| New York, Lake Erie and Western Coal and Railroad Company | | ERIE | 1881 | 1941 | Erie Railroad |
| New York and North Pennsylvania Railroad | | B&O | 1883 | 1898 | Galeton and Eastern Railroad |
| New York, Ontario and Western Railway | O&W, OW | O&W | 1890 | 1957 | N/A |
| New York and Pennsylvania Railroad | | | 1896 | 1902 | New York and Pennsylvania Railway |
| New York and Pennsylvania Railway | | | 1904 | 1935 | N/A |
| New York, Pennsylvania and Ohio Railroad | | ERIE | 1880 | 1896 | Nypano Railroad |
| New York and Pittsburgh Air Line Railroad | | | 1906 | 1907 | Philipsburg Railroad |
| New York and Pittsburg Central Railroad | | | 1903 | 1906 | N/A | Leased the Altoona and Philipsburg Connecting Railroad |
| New York, Pittsburgh and Chicago Railway | | PLE/ PRR | 1881 | 1885 | Wampum and State Line Railway |
| New York Short Line Railroad | | RDG | 1903 | 1923 | Reading Company |
| New York, Susquehanna and Western Railroad | S&W, NYSW | ERIE | 1881 | 1958 | N/A |
| Newport and Shermans Valley Railroad | | | 1890 | 1920 | Susquehanna River and Western Railroad |
| Nicholson Run and Pine Swamp Railroad and Coal Company | | PRR | 1853 | 1856 | New Castle and Darlington Railroad |
| Nittany Valley Railroad | | | 1887 | 1914 | N/A |
| Nittany Valley and Southwestern Railroad | | | 1882 | 1882 | Buffalo Run, Bellefonte and Bald Eagle Railroad |
| Norfolk and Western Railway | N&W, NW | | 1964 | 1998 | Norfolk Southern Railway |
| Norristown and Allentown Railroad | | RDG | 1854 | 1865 | Perkiomen Railroad |
| Norristown and Freemansburg Railroad | | RDG | 1852 | 1854 | Norristown and Allentown Railroad |
| Norristown Junction Railroad | | RDG | 1879 | 1923 | Reading Company |
| Norristown and Main Line Connecting Railroad | | RDG | 1901 | 1923 | Reading Company |
| Norristown and Valley Railroad | | RDG | 1835 | 1850 | Chester Valley Railroad |
| North Bend and Kettle Creek Railroad | | | 1893 | | |
| North Fayette Railroad | | MTR | 1879 | 1879 | Montour Railroad |
| North Lebanon Railroad | | RDG | 1850 | 1870 | Cornwall Railroad |
| North Pennsylvania Railroad | | RDG | 1853 | 1976 | Consolidated Rail Corporation |
| North Shore Railroad | | | 1908 | | |
| North Shore Terminal Railroad | | | 1898 | 1899 | Pittsburgh, Allegheny and McKees Rocks Railroad |
| North Star and Mifflin Railroad | | MTR | 1912 | 1913 | Montour Railroad |
| North and West Branch Railroad | | PRR | 1871 | 1881 | North and West Branch Railway |
| North and West Branch Railway | | PRR | 1881 | 1900 | Schuylkill and Juniata Railroad |
| Northampton Railroad | | LNE | 1901 | 1903 | Lehigh and New England Railroad |
| Northampton and Bath Railroad | NB | | 1902 | 1979 | N/A |
| North East Pennsylvania Railroad | | RDG | 1870 | 1945 | Reading Company |
| Northern Central Railway | | PRR | 1854 | 1976 | Consolidated Rail Corporation |
| Northern Coal and Iron Company | | D&H | 1864 | | |
| Northern Liberties Railway | | | 1896 | | |
| Northern Liberties and Penn Township Railroad | | RDG | 1829 | 1871 | Philadelphia and Reading Railroad |
| Northern Railroad and Navigation Company | | | 1867 | 1873 | Rochester, Nunda and Pennsylvania Railroad |
| Northern Susquehanna Railroad | | B&O | 1900 | 1901 | Buffalo and Susquehanna Railroad |
| North Western Railroad | | PRR | 1853 | 1859 | Western Pennsylvania Railroad |
| North Western Coal and Iron Company | | DL&W | 1856 | 1856 | Buffalo Coal and Iron Company |
| Northwestern Pennsylvania Railway | | PRR | 1895 | 1895 | Western New York and Pennsylvania Railway |
| Northumberland County Railway Company | | | | | |
| Nypano Railroad | | ERIE | 1896 | 1941 | Erie Railroad |
| Octoraro Railroad | OCTR | | 2003 | 2004 | East Penn Railways |
| Octoraro Railway | OCTR | | 1977 | 1994 | Delaware Valley Railway |
| Ohio and Baltimore Short Line Railway | | B&O | 1873 | 1912 | Baltimore and Ohio Railroad in Pennsylvania |
| Ohio Connecting Railway | | PRR | 1886 | 1954 | Penndel Company |
| Ohio and Pennsylvania Railroad | OHPA | | 2004 | 2006 | Eastern States Railroad |
| Ohio and Pennsylvania Railroad | OHPA | | 1995 | 1996 | Central Columbiana and Pennsylvania Railway |
| Ohio and Pennsylvania Railroad | | PRR | 1848 | 1856 | Pittsburgh, Fort Wayne and Chicago Railroad |
| Ohio River Junction Railroad | | | 1908 | 1908 | North Shore Railroad |
| Ohio River and Lake Erie Railroad | | B&LE | 1881 | 1886 | Erie, Shenango and Pittsburgh Railway |
| Oil City and Chicago Railroad | | PRR | 1882 | 1882 | Buffalo, New York and Philadelphia Railroad |
| Oil Creek Railroad | | PRR | 1860 | 1868 | Oil Creek and Allegheny River Railway |
| Oil Creek and Allegheny River Railway | | PRR | 1868 | 1875 | Pittsburgh, Titusville and Buffalo Railway |
| Oil Creek Junction Railroad | | NYC | 1870 | 1871 | Junction Railroad |
| Oil Creek and Titusville Mining and Transportation Company | | PRR | 1865 | 1866 | Union and Titusville Railroad |
| Olean, Bradford and Warren Railway | | PRR | 1877 | 1911 | Bradford Railroad |
| Olean, Oswayo and Eastern Railroad | | | 1892 | 1896 | New York and Pennsylvania Railroad |
| Oleona Railroad | | | 1901 | | |
| Oleona and Germania Railroad | | | 1902 | | |
| Ontario, Carbondale and Scranton Railway | | O&W | 1889 | 1957 | N/A |
| Orangeville and Lehigh Railroad | | PRR | 1892 | 1893 | Central Pennsylvania and Western Railroad |
| Oswayo Valley Railroad | | | 1918 | 1920 | New York and Pennsylvania Railway |
| Pan Handle Railway | | PRR | 1861 | 1868 | Pittsburgh, Cincinnati and St. Louis Railway |
| Panther Creek Railroad | | LNE | 1913 | 1913 | Lehigh and New England Railroad |
| Panther Valley Railroad | PVAL | | 1983 | 1990 | C&S Railroad |
| Parker and Karns City Railroad | | B&O | 1873 | 1881 | Pittsburgh and Western Railroad |
| Path Valley Railroad | | | 1893 | 1900 | Perry Lumber Company |
| Peach Bottom Railroad | | | 1881 | 1890 | Lancaster, Oxford and Southern Railroad |
| Peach Bottom Railway | | | 1868 | 1881 | Peach Bottom Railroad, York and Peach Bottom Railway |
| Pencoyd and Philadelphia Railroad | | | 1899 | 1929 | N/A | Owned by the American Bridge Company |
| Penn Central Transportation Company | PC | | 1968 | 1976 | Consolidated Rail Corporation |
| Penn Eastern Rail Lines | PRL | | 1997 | 2007 | East Penn Railroad |
| Penn Jersey Rail Lines | PJRL | | 1997 | 2002 | SMS Rail Service, Inc. |
| Penn Haven and White Haven Railroad | | LV | 1857 | 1864 | Lehigh Valley Railroad |
| Penndel Company | | PRR | 1954 | 1976 | Consolidated Rail Corporation |
| Pennsylvania Company | | PRR | 1871 | 1918 | Pennsylvania Railroad |
| Pennsylvania Railroad | PRR | PRR | 1846 | 1968 | Penn Central Transportation Company |
| Pennsylvania and Delaware Railroad | | PRR | 1870 | 1873 | Pennsylvania and Delaware Railway |
| Pennsylvania and Delaware Railway | | PRR | 1873 | 1879 | Pomeroy and State Line Railroad |
| Pennsylvania Midland Railroad | | PRR | 1894 | 1902 | Bedford and Hollidaysburg Railroad |
| Pennsylvania Midland Railway | | ERIE | 1881 | 1881 | New York, Susquehanna and Western Railroad |
| Pennsylvania, Monongahela and Southern Railroad | | PRR | 1902 | 1915 | Pennsylvania Railroad |
| Pennsylvania and New Jersey Railroad | | PRR | 1894 | 1896 | Delaware River Railroad and Bridge Company |
| Pennsylvania and New York Canal and Railroad Company | | LV | 1865 | 1949 | Lehigh Valley Railroad |
| Pennsylvania Northern Railroad | | | 1911 | 1913 | Lake Erie, Franklin and Clarion Railroad |
| Pennsylvania and North Western Railroad | | PRR | 1889 | 1903 | Cambria and Clearfield Railway |
| Pennsylvania, Poughkeepsie and Boston Railroad | | LNE | 1887 | 1895 | Lehigh and New England Railroad |
| Pennsylvania Schuylkill Valley Railroad | | PRR | 1883 | 1900 | Schuylkill and Juniata Railroad |
| Pennsylvania, Slatington and New England Railroad | | LNE | 1882 | 1887 | Pennsylvania, Poughkeepsie and Boston Railroad |
| Pennsylvania Southern Railroad | | | 1910 | 1913 | Lake Erie, Franklin and Clarion Railroad |
| Pennsylvania and West Virginia Railroad | | PRR | 1889 | 1893 | Bedford and Blair County Railroad |
| Pennsylvania Western and Ohio River Connecting Railway | | | 1901 | | |
| Pequea Railroad and Improvement Company | | RDG | 1849 | 1851 | Dauphin and Susquehanna Coal Company |
| Perkiomen Railroad | | RDG | 1865 | 1945 | Reading Company |
| Perry County Railroad | | | 1887 | 1903 | Susquehanna River and Western Railroad |
| Perry Lumber Company Railroad | | | 1901 | 1905 | |
| Philadelphia and Baltimore Central Railroad | | PRR | 1853 | 1916 | Philadelphia, Baltimore and Washington Railroad |
| Philadelphia and Columbia Railroad | | PRR | 1834 | 1857 | Pennsylvania Railroad |
| Philadelphia, Baltimore and Washington Railroad | | PRR | 1902 | 1976 | Consolidated Rail Corporation |
| Philadelphia, Bethlehem and New England Railroad | PBNE | | 1910 | 2003 | Lehigh Valley Rail Management | Owned by Bethlehem Steel |
| Philadelphia and Bustleton Railway | | PRR | 1892 | 1893 | Philadelphia, Bustleton and Trenton Railroad |
| Philadelphia, Bustleton and Trenton Railroad | | PRR | 1893 | 1902 | Connecting Railway |
| Philadelphia and Chester County Railroad | | PRR | 1872 | 1885 | Philadelphia Midland Railroad |
| Philadelphia and Chester Valley Railroad | | RDG | 1888 | 1945 | Reading Company |
| Philadelphia, Delaware and Chester Central Railroad | | PRR | 1871 | 1872 | Philadelphia and Chester County Railroad |
| Philadelphia and Delaware County Railroad | | PRR | 1890 | 1913 | Philadelphia and Baltimore Central Railroad |
| Philadelphia and Delaware County Railroad | | PRR | 1831 | 1836 | Philadelphia, Wilmington and Baltimore Railroad |
| Philadelphia, Easton and Water Gap Railroad | | RDG | 1852 | 1853 | North Pennsylvania Railroad |
| Philadelphia and Erie Railroad | | PRR | 1861 | 1907 | Pennsylvania Railroad |
| Philadelphia and Frankford Railroad | | RDG | 1892 | 1923 | Reading Company |
| Philadelphia, Germantown and Chestnut Hill Railroad | | PRR | 1883 | 1902 | Connecting Railway |
| Philadelphia, Germantown and Norristown Railroad | | RDG | 1831 | 1976 | Consolidated Rail Corporation |
| Philadelphia, Harrisburg and Pittsburgh Railroad | | RDG | 1890 | 1923 | Reading Company |
| Philadelphia Midland Railroad | | PRR | 1885 | 1890 | Philadelphia and Delaware County Railroad |
| Philadelphia and Montgomery County Railroad | | RDG | 1860 | 1872 | Philadelphia and Newtown Railroad |
| Philadelphia and Newtown Railroad | | RDG | 1872 | 1873 | Philadelphia, Newtown and New York Railroad |
| Philadelphia and Newtown Connecting Railroad | | RDG | 1892 | 1892 | Philadelphia, Newtown and New York Railroad |
| Philadelphia, Newtown and New York Railroad | | RDG | 1873 | 1945 | Reading Company |
| Philadelphia, Newtown Square and Chester Railroad | | B&O | 1886 | 1886 | Schuylkill River East Side Railroad |
| Philadelphia, Norristown and Phoenixville Railroad | | PRR | 1882 | 1883 | Pennsylvania Schuylkill Valley Railroad |
| Philadelphia and Pittsburgh Railroad | | NYC | 1893 | 1895 | Pittsburgh and Eastern Railroad |
| Philadelphia and Reading Railroad | | RDG | 1833 | 1896 | Philadelphia and Reading Railway |
| Philadelphia and Reading Railway | P&R | RDG | 1896 | 1924 | Reading Company |
| Philadelphia and Reading Terminal Railroad | | RDG | 1888 | 1944 | Reading Company |
| Philadelphia and Sunbury Railroad | | PRR | 1851 | 1858 | Shamokin Valley and Pottsville Railroad |
| Philadelphia and Trenton Railroad | | PRR | 1832 | 1976 | Consolidated Rail Corporation |
| Philadelphia, Wilmington and Baltimore Railroad | | PRR | 1836 | 1902 | Philadelphia, Baltimore and Washington Railroad |
| Philipsburg Railroad | | | 1907 | 1909 | Philipsburg and Susquehanna Valley Railroad |
| Philipsburg Coal, Iron and Oil Company | | PRR | 1865 | 1867 | Tyrone and Clearfield Railway |
| Philipsburg and Susquehanna Valley Railroad | | | 1909 | 1910 | Pittsburgh and Susquehanna Railroad |
| Phoenixville, Pottstown and Reading Railroad | | PRR | 1882 | 1883 | Pennsylvania Schuylkill Valley Railroad |
| Phoenixville and West Chester Railroad | | PRR | 1882 | 1883 | Pennsylvania Schuylkill Valley Railroad |
| Pickering Valley Railroad | | RDG | 1869 | 1948 | Reading Company |
| Pine Creek Railway | | NYC | 1884 | 1909 | Geneva, Corning and Southern Railroad |
| Pine Grove and Lebanon Railroad | | RDG | 1868 | 1871 | Lebanon and Tremont Railroad |
| Pine Run Railroad | | PRR | 1906 | 1912 | Cambria and Clearfield Railway |
| Pittsburgh Railroad | | B&O | 1879 | 1879 | Pittsburgh Southern Railway |
| Pittsburgh and Allegheny Railroad | | | 1899 | 1899 | Pittsburgh, Allegheny and McKees Rocks Railroad |
| Pittsburgh and Allegheny River Railroad | | | 1898 | | |
| Pittsburgh and Beck's Run Railroad | | PLE | 1877 | 1880 | Pittsburgh and Lake Erie Railroad |
| Pittsburg, Bessemer and Lake Erie Railroad | | B&LE | 1897 | 1948 | Bessemer and Lake Erie Railroad |
| Pittsburgh, Bradford and Buffalo Railway | | B&O | 1881 | 1883 | Pittsburgh and Western Railroad |
| Pittsburgh, Butler and Shenango Railroad | | B&LE | 1889 | 1890 | Pittsburgh, Shenango and Lake Erie Railroad |
| Pittsburgh and Carnegie Railroad | | P&WV | 1901 | 1901 | Pittsburgh, Carnegie and Western Railroad |
| Pittsburgh, Carnegie and Western Railroad | | P&WV | 1901 | 1904 | Wabash Pittsburgh Terminal Railway |
| Pittsburgh and Castle Shannon Railroad | | | 1871 | 1909 | N/A |
| Pittsburgh, Castle Shannon and Washington Railroad | | B&O | 1877 | 1878 | Pittsburgh Southern Railroad |
| Pittsburgh, Chartiers and Youghiogheny Railway | PCY | PLE/ PRR | 1881 | 1996 | Pittsburgh Industrial Railroad |
| Pittsburgh and Chicago Railway | | B&O, PLE/ PRR | 1878 | 1881 | New York, Pittsburgh and Chicago Railway, Pittsburgh and Western Railroad |
| Pittsburgh, Cincinnati and St. Louis Railway | | PRR | 1868 | 1890 | Pittsburgh, Cincinnati, Chicago and St. Louis Railway |
| Pittsburgh, Cincinnati, Chicago and St. Louis Railroad | | PRR | 1917 | 1956 | Philadelphia, Baltimore and Washington Railroad |
| Pittsburgh, Cincinnati, Chicago and St. Louis Railway | | PRR | 1890 | 1917 | Pittsburgh, Cincinnati, Chicago and St. Louis Railroad |
| Pittsburgh, Clarion and Franklin Railroad | | | 1912 | 1913 | Lake Erie, Franklin and Clarion Railroad |
| Pittsburg, Cleveland and Toledo Railroad | | B&O | 1882 | 1915 | Pittsburgh and Western Railroad |
| Pittsburgh and Connellsville Railroad | | B&O | 1837 | 1912 | Baltimore and Ohio Railroad in Pennsylvania |
| Pittsburgh East and West Railroad | | B&O | 1881 | 1881 | Pittsburgh and Western Railroad |
| Pittsburgh and Eastern Railroad | | NYC | 1894 | 1905 | Beech Creek Extension Railroad |
| Pittsburgh and Erie Railroad | | ERIE, PRR | 1846 | 1857 | Erie and Pittsburgh Railroad, Meadville Railroad |
| Pittsburgh, Fort Wayne and Chicago Railroad | | PRR | 1856 | 1861 | Pittsburgh, Fort Wayne and Chicago Railway |
| Pittsburgh, Fort Wayne and Chicago Railway | | PRR | 1860 | 1976 | Consolidated Rail Corporation |
| Pittsburgh Industrial Railroad | PIR | | 1996 | 2001 | Pittsburgh and Ohio Central Railroad |
| Pittsburgh, Johnstown, Ebensburg and Eastern Railroad | | | 1897 | 1903 | New York and Pittsburg Central Railroad |
| Pittsburgh Junction Railroad | | B&O | 1881 | 1943 | Pittsburgh and Western Railroad |
| Pittsburg, Kittanning and Warren Railroad | | PRR | 1837 | 1852 | Allegheny Valley Railroad |
| Pittsburgh and Lake Erie Railroad | PLE | PLE | 1875 | 1992 | Three Rivers Railway |
| Pittsburgh, Lisbon and Western Railroad | PL&W, PLW | PLE/ PRR | 1902 | 1945 | Youngstown and Southern Railway |
| Pittsburgh, Lisbon and Western Railway | | PLE/ PRR | 1896 | 1902 | Pittsburgh, Lisbon and Western Railroad |
| Pittsburgh Local Railroad | | B&O | 1880 | 1881 | Pittsburgh Junction Railroad |
| Pittsburgh and Mansfield Railroad | | P&WV | 1893 | 1901 | Pittsburgh, Carnegie and Western Railroad |
| Pittsburgh, Marion and Chicago Railway | | PLE/ PRR | 1886 | 1896 | Pittsburgh, Lisbon and Western Railway |
| Pittsburgh, McKeesport and Youghiogheny Railroad | | PLE | 1881 | 1965 | Pittsburgh and Lake Erie Railroad |
| Pittsburgh and Moon Run Railroad | | MTR | 1891 | 1913 | Montour Railroad |
| Pittsburgh, New Castle and Cleveland Railroad | | PRR | 1857 | 1861 | New Castle and Beaver Valley Railroad |
| Pittsburgh, New Castle and Lake Erie Railroad | | B&O | 1877 | 1881 | Pittsburgh and Western Railroad |
| Pittsburgh and Northeastern Railroad | | | | | |
| Pittsburgh and Northeastern Terminal Railroad | | | | 1916 | Pittsburgh and Northern Terminal Railroad |
| Pittsburgh and Northern Railroad | | | 1881 | | |
| Pittsburgh and Northern Terminal Railroad | | | 1916 | | |
| Pittsburgh and Northwestern Railroad | | B&O | 1875 | 1877 | Pittsburgh, New Castle and Lake Erie Railroad |
| Pittsburgh and Ohio Valley Railway | P&OV, POV | | 1899 | 1993 | Three Rivers Railway |
| Pittsburg and Shawmut Railroad | PS, PSR | PS&N | 1909 | | | Still exists as a nonoperating subsidiary of the Buffalo and Pittsburgh Railroad |
| Pittsburg, Shawmut and Northern Railroad | | PS&N | 1899 | 1947 | N/A |
| Pittsburgh, Shenango and Lake Erie Railroad | | B&LE | 1888 | 1897 | Pittsburg, Bessemer and Lake Erie Railroad |
| Pittsburgh Southern Railroad | | B&O | 1878 | 1879 | Pittsburgh Southern Railway |
| Pittsburgh Southern Railway | | B&O | 1879 | 1884 | Baltimore and Ohio Short Line Railroad |
| Pittsburgh and State Line Railroad | | B&O | 1885 | 1887 | Buffalo, Rochester and Pittsburgh Railway |
| Pittsburg and Steubenville Railroad | | PRR | 1849 | 1867 | Pan Handle Railway |
| Pittsburgh, Summerville and Clarion Railroad | | | 1903 | 1912 | Pittsburgh, Clarion and Franklin Railroad |
| Pittsburgh and Susquehanna Railroad | | | 1910 | 1931 | N/A |
| Pittsburgh, Titusville and Buffalo Railway | | PRR | 1876 | 1881 | Buffalo, Pittsburgh and Western Railroad |
| Pittsburgh, Virginia and Charleston Railway | | PRR | 1870 | 1905 | Pennsylvania Railroad |
| Pittsburgh, Washington and Baltimore Railroad | | | | | |
| Pittsburgh and West Virginia Railroad | | | 1967 | | | Still exists as a lessor of the Wheeling and Lake Erie Railway |
| Pittsburgh and West Virginia Railway | P&WV | P&WV | 1916 | 1967 | Pittsburgh and West Virginia Railroad |
| Pittsburgh and Western Railroad | | B&O | 1902 | | |
| Pittsburgh and Western Railroad | | B&O | 1879 | 1887 | Pittsburgh and Western Railway |
| Pittsburgh and Western Railway | | B&O | 1887 | 1902 | Pittsburgh and Western Railroad |
| Pittsburgh, Westmoreland and Somerset Railroad | | | 1899 | 1916 | N/A |
| Pittsburgh and Whitehall Railroad | | PRR | 1882 | 1888 | Pittsburgh, Virginia and Charleston Railway |
| Pittsburgh, Youngstown and Ashtabula Railroad | | PRR | 1887 | 1906 | Pittsburgh, Youngstown and Ashtabula Railway |
| Pittsburgh, Youngstown and Ashtabula Railway | | PRR | 1906 | 1976 | Consolidated Rail Corporation |
| Pittsburg, Youngstown and Chicago Railroad | | B&O | 1880 | 1882 | Pittsburg, Cleveland and Toledo Railroad |
| Plumville Railroad | | B&O | 1905 | 1907 | Buffalo and Susquehanna Railroad |
| PL&W Railroad | PLW | | 1993 | 1995 | Ohio and Pennsylvania Railroad |
| Plymouth Railroad | | RDG | 1836 | 1976 | Consolidated Rail Corporation |
| Plymouth and Wilkes-Barre Road and Bridge Company | | D&H | 1859 | 1873 | Northern Coal and Iron Company |
| Pocono Northeast Railway | PNER | | 1982 | 1993 | Luzerne and Susquehanna Railway |
| Pomeroy and Newark Railroad | | PRR | 1881 | 1917 | Philadelphia, Baltimore and Washington Railroad |
| Pomeroy and State Line Railroad | | PRR | 1880 | 1881 | Pomeroy and Newark Railroad |
| Port Kennedy Railroad | | RDG | 1860 | 1872 | Philadelphia and Reading Railroad |
| Portland and Northern Railway | | | 1901 | | |
| Portsmouth and Lancaster Railroad | | PRR | 1832 | 1835 | Harrisburg, Portsmouth, Mountjoy and Lancaster Railroad |
| Potato Creek Railroad | | | 1907 | 1927 | N/A |
| Pottsville and Mahanoy Railroad | | PRR | 1883 | 1886 | Pennsylvania Schuylkill Valley Railroad |
| Pottsville and New York Railroad | | LV | 1882 | 1887 | Schuylkill and Lehigh Valley Railroad |
| Quakertown and Bethlehem Railroad | | | 1916 | 1937 | N/A |
| Quakertown and Delaware River Railroad | | | 1911 | 1916 | Quakertown and Bethlehem Railroad |
| Quakertown and Eastern Railroad | | | 1896 | 1911 | Quakertown and Delaware River Railroad |
| Quemahoning Branch Railroad | | | 1901 | | |
| Railroad Ventures, Inc. | | | 1996 | 2001 | Columbiana County Port Authority |
| Reading Company | RDG | RDG | 1924 | 1976 | Consolidated Rail Corporation |
| Reading Belt Railroad | | RDG | 1900 | 1923 | Reading Company |
| Reading and Columbia Railroad | | RDG | 1859 | 1945 | Reading Company |
| Reading and Lehigh Railroad | | RDG | 1875 | 1879 | Schuylkill and Lehigh Railroad |
| Reading and Lehigh Railroad | | RDG | 1856 | 1857 | East Pennsylvania Railroad |
| Reading, Marietta and Hanover Railroad | | RDG | 1882 | 1930 | N/A |
| Reading and Pottsville Railroad | | PRR | 1884 | 1885 | Pennsylvania Schuylkill Valley Railroad |
| Red Bank Railroad | RBKX | | 1990 | 1996 | Pittsburg and Shawmut Railroad |
| Red Bank and Youngstown Railroad | | B&O | 1881 | 1882 | Pittsburgh and Western Railroad |
| Redstone Central Railroad | | MGA | 1902 | | N/A |
| Reno, Oil Creek and Pithole Railway | | PRR | 1865 | 1867 | Oil Creek and Allegheny River Railway |
| Reynoldsville and Falls Creek Railroad | | | 1883 | 1934 | N/A |
| Ridgway and Clearfield Railroad | | PRR | 1882 | 1911 | Pennsylvania Railroad |
| River Front Railroad | | PRR | 1876 | 1903 | Pennsylvania Railroad |
| Rochester, Beaver Falls and Western Railway | | PRR | 1889 | 1890 | Pennsylvania Company |
| Rochester, Nunda and Pennsylvania Railroad | | | 1873 | 1877 | Sold at foreclosure; no property in Pennsylvania |
| Rochester and Pittsburgh Railroad | | B&O | 1881 | 1885 | Pittsburgh and State Line Railroad |
| Rockwood and Bakersville Railway | | B&O | 1907 | 1911 | Indian Creek Valley Railway |
| Rocky Ridge Railroad | | | 1907 | 1913 | East Broad Top Railroad and Coal Company |
| Rogers Railroad | | | 1902 | | |
| Rupert and Bloomsburg Railroad | | RDG | 1888 | 1923 | Reading Company |
| Rural Valley Railroad | | B&O | 1900 | 1925 | Allegheny and Western Railway |
| St. Clair Terminal Railroad | | | 1901 | 1937 | Union Railroad |
| St. Marys and Western Railroad | | | 1904 | | |
| St. Marys and Southwestern Railroad | | PS&N | 1893 | 1897 | Buffalo, St. Marys and Southwestern Railroad |
| Salamanca, Bradford and Allegheny River Railroad | | PRR | 1880 | 1881 | Buffalo, Pittsburgh and Western Railroad |
| Salisbury Railroad | | B&O | 1875 | 1912 | Baltimore and Ohio Railroad in Pennsylvania |
| Salisbury and Baltimore Railroad and Coal Company | | B&O | 1871 | 1875 | Salisbury Railroad |
| Scalp Level Railroad | | PRR | 1897 | 1902 | South Fork Railroad |
| Schuylkill East Branch Navigation Company | | RDG | 1828 | 1829 | Little Schuylkill Navigation, Railroad and Coal Company |
| Schuylkill Haven and Lehigh River Railroad | | RDG | 1862 | 1863 | Mine Hill and Schuylkill Haven Railroad |
| Schuylkill and Juniata Railroad | | PRR | 1900 | 1902 | Pennsylvania Railroad |
| Schuylkill and Lehigh Railroad | | RDG | 1880 | 1923 | Reading Company |
| Schuylkill and Lehigh Valley Railroad | | LV | 1886 | 1949 | Lehigh Valley Railroad |
| Schuylkill River East Side Railroad | | B&O | 1883 | | |
| Schuylkill and Susquehanna Railroad | | RDG | 1859 | 1872 | Philadelphia and Reading Railroad |
| Schuylkill Valley Navigation Company | | RDG | 1828 | 1829 | Schuylkill Valley Navigation and Railroad Company |
| Schuylkill Valley Navigation and Railroad Company | | RDG | 1829 | 1950 | Reading Company |
| Scootac Railway | | | 1901 | | |
| Scotland and Mont Alto Railroad | | PRR | 1864 | 1871 | Mont Alto Railroad |
| Scottdale Connecting Railroad | | | 1897 | | |
| Scotts Run Railway | | MGA | 1923 | 1933 | Monongahela Railway |
| Scranton and Forest City Railroad | | O&W | 1886 | 1889 | Ontario, Carbondale and Scranton Railway |
| Scranton and Spring Brook Railroad | | | 1897 | | |
| Shade Gap Railroad | | | 1884 | 1913 | East Broad Top Railroad and Coal Company |
| Shamokin, Sunbury and Lewisburg Railroad | | RDG | 1882 | 1923 | Reading Company |
| Shamokin and Trevorton Railroad | | RDG | 1868 | 1870 | Mahanoy and Shamokin Railroad |
| Shamokin Valley and Pottsville Railroad | | PRR | 1858 | 1976 | Consolidated Rail Corporation |
| Sharon Railway | | ERIE | 1873 | 1953 | Erie Railroad |
| Sharon and Ceres Railroad | | | 1901 | 1904 | New York and Pennsylvania Railway |
| Sharon Connecting Railroad | | | | | |
| Sharpsville Railroad | | PRR | 1876 | 1931 | Erie and Pittsburgh Railroad, Western New York and Pennsylvania Railway |
| Sharpsville and Oakland Railroad | | PRR | 1866 | 1876 | Sharpsville Railroad |
| Sharpsville, Wheatland, Sharon and Greenfield Railroad | | ERIE | 1870 | 1875 | Sharon Railway |
| Shawmut Connecting Railroad | | PS&N | 1900 | 1905 | Pittsburg, Shawmut and Northern Railroad |
| Sheffield and Spring Creek Railroad | | | 1884 | 1894 | Tionesta Valley Railway |
| Sheffield and Tionesta Railway | S&T | | 1900 | 1943 | N/A |
| Shenango and Allegheny Railroad | | B&LE | 1867 | 1888 | Pittsburgh, Shenango and Lake Erie Railroad |
| Shenango and Beaver Valley Railway | | PLE/ PRR | 1902 | 1902 | Pittsburgh, Lisbon and Western Railroad |
| Shenango Valley Railroad | | NYC | 1886 | 1963 | Mahoning and Shenango Valley Railway |
| Sinnemahoning Portage Railroad | | PRR | 1865 | 1866 | Buffalo and Washington Railway |
| Sinnemahoning Valley Railroad | | B&O | 1885 | 1893 | Buffalo and Susquehanna Railroad |
| Slackwater Connecting Railroad | | | 1892 | | |
| Slate Ridge and Delta Railway | | | 1879 | 1888 | Maryland Central Railway |
| Slate Run Railroad | | | 1884 | | |
| Slate Valley Railroad | | LNE | 1886 | 1891 | Pennsylvania, Poughkeepsie and Boston Railroad |
| Smethport Railroad | | | 1899 | 1931 | N/A | Operated by Mount Jewett, Kinzua and Riterville Railroad |
| Smethport and Olean Railroad | | PS&N | 1895 | 1899 | Pittsburg, Shawmut and Northern Railroad |
| Smithfield and Masontown Railroad | | B&O | 1899 | 1915 | Fairmont, Morgantown and Pittsburg Railroad |
| Somerset and Bedford Railroad | | PRR | 1894 | 1894 | Pennsylvania Midland Railroad |
| Somerset and Cambria Railroad | | B&O | 1879 | 1912 | Baltimore and Ohio Railroad in Pennsylvania |
| Somerset Coal Railway | | WM | 1915 | 1950 | Western Maryland Railway |
| Somerset and Mineral Point Railroad | | B&O | 1868 | 1879 | Somerset and Cambria Railroad |
| South Branch Railroad | | | | | |
| South Chester Railroad | | PRR | 1891 | 1906 | Philadelphia, Baltimore and Washington Railroad |
| South Easton and Phillipsburg Railroad | | | 1899 | 1912 | Lehigh and Hudson River Railway |
| South Fork Railroad | | PRR | 1890 | 1903 | Pennsylvania Railroad |
| South Mountain Iron Company | | RDG | 1869 | 1877 | South Mountain Railway and Mining Company |
| South Mountain Railway and Mining Company | | RDG | 1877 | 1891 | Gettysburg and Harrisburg Railway |
| South Shore Railroad | | | 1892 | | |
| Southern Pennsylvania Iron and Railroad Company | | PRR | 1869 | 1872 | Southern Pennsylvania Railway and Mining Company |
| Southern Pennsylvania Railway and Mining Company | | PRR | 1873 | 1954 | Penndel Company |
| Southwark Railroad | | PRR | 1831 | 1877 | Philadelphia, Wilmington and Baltimore Railroad |
| South West Connecting Railway | | PRR | 1897 | 1908 | Pennsylvania Railroad |
| South-West Pennsylvania Railway | | PRR | 1871 | 1906 | Pennsylvania Railroad |
| Southwestern Du Bois Railroad | | B&O | 1905 | 1907 | Buffalo and Susquehanna Railroad |
| Spring Brook Railroad | | | 1871 | 1890 | Scranton and Spring Brook Railroad |
| Spring Brook Horse Railway | | | 1869 | 1871 | Spring Brook Railroad |
| Spring Creek Railway | | | 1902 | 1904 | Tionesta Valley Railway |
| State Line Railroad | | B&O | 1890 | 1895 | Buffalo and Susquehanna Railroad |
| State Line Railroad | | B&O | 1884 | 1893 | Fairmont, Morgantown and Pittsburg Railroad |
| State Line and Sullivan Railroad | | LV | 1874 | 1949 | Lehigh Valley Railroad |
| Stewart Railroad | | NYC | 1887 | 1963 | Mahoning and Shenango Valley Railway |
| Stewartstown Railroad | STRT | | 1884 | 1992 | Continued as a tourist railroad |
| Stony Creek Railroad | | RDG | 1868 | 1945 | Reading Company |
| Sullivan and Erie Coal and Railroad Company | | LV | 1865 | 1874 | State Line and Sullivan Railroad |
| Summit Branch Railroad | | | 1846 | 1897 | Summit Branch Coal Company |
| Sunbury and Erie Railroad | | PRR | 1837 | 1861 | Philadelphia and Erie Railroad |
| Sunbury, Hazleton and Wilkesbarre Railway | | PRR | 1878 | 1900 | Schuylkill and Juniata Railroad |
| Sunbury and Lewistown Railroad | | PRR | 1870 | 1900 | Schuylkill and Juniata Railroad |
| Susquehanna Railroad | | B&O | 1891 | 1893 | Buffalo and Susquehanna Railroad |
| Susquehanna Railroad | | PRR | 1851 | 1854 | Northern Central Railway |
| Susquehanna, Bloomsburg, and Berwick Railroad | | PRR | 1902 | 1918 | Pennsylvania Railroad |
| Susquehanna and Buffalo Railroad | | | 1891 | | |
| Susquehanna and Clearfield Railroad | | PRR/NYC | 1879 | 1901 | Beech Creek Extension Railroad | Sold by the Pennsylvania Railroad to the New York Central & Hudson River Railroad in 1901 |
| Susquehanna Connecting Railroad | | ERIE | 1896 | | |
| Susquehanna and Eagles Mere Railroad | | | | | |
| Susquehanna, Gettysburg and Potomac Railway | | WM | 1871 | 1874 | Hanover Junction, Hanover and Gettysburg Railroad |
| Susquehanna and New York Railroad | S&NY | LV | 1902 | 1942 | Lehigh Valley Railroad |
| Susquehanna and New York Railroad | | B&O | 1898 | 1901 | Buffalo and Susquehanna Railroad |
| Susquehanna River and Western Railroad | | | 1903 | 1939 | N/A |
| Susquehanna and Southern Railroad | | B&O | 1902 | 1906 | Buffalo and Susquehanna Railroad |
| Susquehanna and Southwestern Railroad | | NYC | 1882 | 1883 | Beech Creek, Clearfield and Southwestern Railroad |
| Susquehanna and Union Bridge Company | | RDG | 1850 | 1854 | Trevorton and Susquehanna Railroad |
| Swatara Railroad | | RDG | 1841 | 1863 | Philadelphia and Reading Railroad |
| Swatara and Good Spring Railroad | | RDG | 1840 | 1841 | Swatara Railroad |
| Tamaqua, Hazleton and Northern Railroad | | RDG | 1891 | 1923 | Reading Company |
| Thomas Railroad | | LV/ RDG | 1906 | 1917 | Ironton Railroad |
| Three Rivers Railway | | | 1992 | | | Still exists as a nonoperating subsidiary of CSX Transportation |
| Tiadaghton and Fahnastalk Railway | | | 1892 | | |
| Tioga Railroad | | ERIE | 1850 | 1941 | Erie Railroad |
| Tioga Navigation Company | | ERIE | 1828 | 1852 | Tioga Railroad |
| Tionesta Valley Railroad | | | 1879 | 1894 | Tionesta Valley Railway |
| Tionesta Valley Railway | | | 1894 | 1941 | N/A |
| Tionesta Valley and Hickory Railway | | | 1892 | 1911 | Sheffield and Tionesta Railway |
| Tionesta Valley and Salmon Creek Railway | | | 1893 | 1901 | Sheffield and Tionesta Railway |
| Tipton Railroad | | PRR | 1885 | 1927 | N/A |
| Titusville and Oil City Railway | | PRR | 1878 | 1881 | Buffalo, Pittsburgh and Western Railroad |
| Titusville and Petroleum Centre Railroad | | PRR | 1870 | 1878 | Titusville and Oil City Railway |
| Towanda and Franklin Railroad | | LV | 1853 | 1854 | Barclay Railroad and Coal Company |
| Trenton Cut-off Railroad | | PRR | 1889 | 1902 | Pennsylvania Railroad |
| Trenton Delaware Bridge Company | | PRR | 1835 | 1903 | N/A |
| Tresckow Railroad | | CNJ | 1870 | 1963 | Lehigh Coal and Navigation Company |
| Trevorton Coal Company | | RDG | 1861 | 1867 | Zerbe Valley Railroad |
| Trevorton Coal and Railroad Company | | RDG | 1856 | 1860 | Trevorton Coal Company |
| Trevorton, Mahanoy and Susquehanna Railroad | | RDG | 1850 | 1854 | Trevorton and Susquehanna Railroad |
| Trevorton and Susquehanna Railroad | | RDG | 1854 | 1856 | Trevorton Coal and Railroad Company |
| Turbotville and Williamsport Railroad | | PRR | 1892 | 1893 | Central Pennsylvania and Western Railroad |
| Turtle Creek and Allegheny River Railroad | | | | | |
| Turtle Creek Valley Railroad | | PRR | 1886 | 1903 | Pennsylvania Railroad |
| Tuscarora Valley Railroad | | | 1891 | 1934 | N/A |
| Tylerdale Connecting Railroad | TYC | B&O/ PRR | 1899 | | | Still exists as a nonoperating subsidiary of CSX Transportation |
| Tyrone and Clearfield Railroad | | PRR | 1854 | 1866 | Pennsylvania Railroad, Tyrone and Clearfield Railway |
| Tyrone and Clearfield Railway | | PRR | 1867 | 1903 | Cambria and Clearfield Railway |
| Tyrone and Lock Haven Railroad | | PRR | 1857 | 1861 | Bald Eagle Valley Railroad |
| Union Canal Company of Pennsylvania | | RDG | 1826 | 1866 | Philadelphia and Reading Railroad |
| Union Coal Company | | D&H | 1864 | 1868 | Baltimore Coal and Union Railroad Company |
| Union and Titusville Railroad | | PRR | 1866 | 1871 | Oil Creek and Allegheny River Railway |
| Uniontown Railway | | PRR | 1879 | 1879 | Brownsville Railway |
| Uniontown and West Virginia Railroad | | PRR | 1868 | 1877 | South-West Pennsylvania Railway |
| United New Jersey Railroad and Canal Company | | PRR | 1958 | 1976 | Consolidated Rail Corporation |
| Unity Railways | UNI | | 1915 | 1990 | N/A |
| Ursina and North Fork Railroad | | | 1871 | 1882 | Ursina and North Fork Railway |
| Ursina and North Fork Railway | | | 1882 | 1936 | N/A |
| Valley Railroad | | | 1893 | 1936 | N/A |
| Valley Connecting Railroad | | | 1898 | | |
| Wabash Pittsburgh Terminal Railway | | P&WV | 1904 | 1916 | Pittsburgh and West Virginia Railway |
| Wampum and State Line Railway | | PLE/ PRR | 1886 | 1886 | Pittsburgh, Marion and Chicago Railway |
| Warren and Farnsworth Railroad | | | 1885 | 1894 | Tionesta Valley Railway |
| Warren and Farnsworth Valley Railroad | | | 1882 | 1885 | Warren and Farnsworth Railroad |
| Warren and Franklin Railway | | PRR | 1864 | 1868 | Oil Creek and Allegheny River Railway |
| Warren and Tidioute Railroad | | PRR | 1861 | 1864 | Warren and Franklin Railway |
| Warren and Venango Railroad | | NYC | 1871 | 1873 | Dunkirk, Allegheny Valley and Pittsburgh Railroad |
| Washington Railroad | | B&O | 1879 | 1879 | Pittsburgh Southern Railway |
| Washington County Railroad | | P&WV | 1900 | 1901 | Pittsburgh, Carnegie and Western Railroad |
| Washington and Franklin Railroad | | WM | 1898 | 1899 | Washington and Franklin Railway |
| Washington and Franklin Railway | | WM | 1899 | | | Owned by the Reading Company and leased to the Western Maryland Railway; still exists as a lessor of CSX Transportation, owned by Reading International, Inc. |
| Washington and Maryland Line Railroad | | PRR | 1857 | 1860 | Columbia and Maryland Line Railroad |
| Washington Run Railroad | WRN | | 1895 | 1931 | N/A |
| Water Gap Railroad | | ERIE | 1880 | 1881 | New York, Susquehanna and Western Railroad |
| Waynesburg Southern Railroad | WAS | MGA | 1966 | 1976 | Consolidated Rail Corporation |
| Waynesburg and Washington Railroad | WAW | PRR | 1875 | 1976 | Consolidated Rail Corporation |
| Wellsboro and Lawrenceville Railroad | | NYC | 1867 | 1873 | Corning, Cowanesque and Antrim Railway |
| Wellsville, Addison and Galeton Railroad | WAG | | 1954 | 1979 | N/A |
| West Branch Valley Railroad | | NYC | 1898 | 1901 | Beech Creek Extension Railroad |
| West Chester Railroad | | PRR | 1831 | 1903 | Pennsylvania Railroad |
| West Chester and Philadelphia Railroad | | PRR | 1848 | 1881 | Philadelphia and Baltimore Central Railroad |
| West Clarion Railroad | | ERIE | 1897 | 1941 | Erie Railroad |
| West Penn and Shenango Connecting Railroad | | B&LE | 1882 | 1889 | Pittsburgh, Butler and Shenango Railroad |
| West Pittston – Exeter Railroad | | LV | 1925 | | |
| West Reading Railroad | | RDG | 1860 | 1873 | Philadelphia and Reading Railroad |
| West Side Belt Railroad | WSB | P&WV | 1895 | 1928 | Pittsburgh and West Virginia Railway |
| Westerman Coal and Iron Railroad | | ERIE | | 1941 | Nypano Railroad |
| Western Allegheny Railroad | WAL | B&LE | 1902 | 1967 | Bessemer and Lake Erie Railroad |
| Western Maryland Railroad | | WM | 1879 | 1909 | Western Maryland Railway |
| Western Maryland Railway | WM | WM | 1909 | 1989 | CSX Transportation |
| Western New York and Pennsylvania Railroad | | PRR | 1887 | 1895 | Northwestern Pennsylvania Railway |
| Western New York and Pennsylvania Railway | | PRR | 1895 | 1955 | Penndel Company |
| Western New York and Pennsylvania Railway of Pennsylvania | | PRR | 1887 | 1887 | Western New York and Pennsylvania Railroad |
| Western Pennsylvania Railroad | | PRR | 1860 | 1903 | Pennsylvania Railroad |
| Western Washington Railroad | | PRR | 1900 | 1907 | Chartiers Railway |
| Westinghouse Inter-Works Railway | | | 1902 | 1962 | |
| White Deer and Logantown Railway | | | 1906 | | |
| Wheeling, Pittsburgh and Baltimore Railroad | | B&O | 1872 | | |
| Wilcox and Howard Hill Improvement Company | | ERIE | 1870 | 1881 | New York, Lake Erie and Western Coal and Railroad Company |
| Wilkes-Barre Connecting Railroad | WBC | D&H/ PRR | 1912 | | |
| Wilkes-Barre and Eastern Railroad | | ERIE | 1892 | 1941 | Moosic Mountain and Carbondale Railroad |
| Wilkes-Barre and Harvey's Lake Railroad | | LV | 1885 | 1904 | Loyalsock Railroad |
| Wilkesbarre and Pittston Railroad | | PRR | 1859 | 1867 | Danville, Hazleton and Wilkes-Barre Railroad |
| Wilkes-Barre and Scranton Railroad | | CNJ | 1851 | 1860 | Nanticoke Railroad |
| Wilkes-Barre and Scranton Railway | | CNJ | 1886 | 1963 | Central Railroad of New Jersey |
| Wilkesbarre and Western Railway | | PRR | 1886 | 1893 | Central Pennsylvania and Western Railroad |
| Williams Valley Railroad | | RDG | 1891 | 1947 | Reading Company |
| Williamsport and Elmira Railroad | | PRR | 1832 | 1860 | Elmira and Williamsport Railroad |
| Williamsport and North Branch Railroad | W&NB | | 1882 | 1921 | Williamsport and North Branch Railway |
| Williamsport and North Branch Railway | W&NB | | 1921 | 1937 | N/A |
| Wilmington and Northern Railroad | | RDG | 1877 | 1976 | Consolidated Rail Corporation |
| Wilmington and Reading Railroad | | RDG | 1866 | 1876 | Wilmington and Northern Railroad |
| Wilmington and Western Railroad | | B&O | 1869 | 1877 | Delaware Western Railroad |
| Wind Gap and Delaware Railroad | | LNE | 1880 | 1904 | Lehigh and New England Railroad |
| Winfield Railroad | | | 1900 | 1979 | N/A |
| Wrightsville and Gettysburg Railroad | | PRR | 1836 | 1837 | Wrightsville, York and Gettysburg Railroad |
| Wrightsville and York Railroad | | PRR | 1835 | 1837 | Wrightsville, York and Gettysburg Railroad |
| Wrightsville, York and Gettysburg Railroad | | PRR | 1837 | 1870 | Pennsylvania Railroad |
| Wyoming and Pond Creek Railroad | | | 1897 | | |
| York and Cumberland Railroad | | PRR | 1846 | 1854 | Northern Central Railway |
| York, Hanover and Frederick Railroad | | PRR | 1897 | 1914 | York, Hanover and Frederick Railway |
| York, Hanover and Frederick Railway | | PRR | 1914 | 1954 | Penndel Company |
| York Haven and Rowenna Railroad | | PRR | 1902 | 1906 | Pennsylvania Railroad |
| York and Maryland Line Railroad | | PRR | 1832 | 1854 | Northern Central Railway |
| York and Peach Bottom Railway | | | 1882 | 1891 | Baltimore and Lehigh Railroad |
| York Southern Railroad | | | 1894 | 1901 | Maryland and Pennsylvania Railroad |
| York Terminal Railway | | | 1913 | | |
| Youghiogheny and Ligonier Valley Railroad | | B&O | 1906 | 1906 | Indian Creek Valley Railway |
| Youghiogheny Northern Railway | | PLE | 1881 | 1945 | N/A |
| Youghiogheny and Wick Haven Railroad | | | 1893 | | |
| Youngstown, Lawrence and Pittsburgh Railroad | | PRR | 1887 | 1887 | Pittsburgh, Youngstown and Ashtabula Railroad |
| Youngstown and Southern Railway | YS | PLE/ PRR | 1945 | 1996 | Railroad Ventures, Inc. |
| Zerbe Valley Railroad | | RDG | 1867 | 1870 | Mahanoy and Shamokin Railroad |

## Electric

* Adamsville and Mohnsville Electric Railway
* Allegheny, Bellevue and Perrysville Railway
* Allegheny Traction Company
* Allegheny Valley Street Railway
* Allen Street Railway
* Allentown and Reading Traction Company
* Altoona and Logan Valley Electric Railway
* Ardmore and Llanerch Street Railway
* Bangor and Portland Traction Company
* Beaver Valley Traction Company
* Bethlehem and Nazareth Passenger Railway
* Birdsboro Street Railway
* Blue Ridge Traction Company
* Bradford Street Railroad
* Butler Passenger Railway
* Cambria Incline Plane Company
* Carbon Street Railway
* Carbondale Railway
* Carlisle and Mechanicsburg Street Railway
* Carlisle and Mount Holly Railway
* Catherine and Bainbridge Streets Railway of Philadelphia
* Centennial Passenger Railway
* Central Pennsylvania Traction Company
* Central Traction Company
* Central Valley Railroad
* Centre and Clearfield Street Railway
* Chambersburg and Gettysburg Electric Railway
* Chambersburg, Greencastle and Waynesboro Street Railway
* Chester, Darby and Philadelphia Railway
* Chester and Delaware Street Railway
* Chester and Media Electric Railway
* Chester Street Railway
* Chester Traction Company
* Citizens' Clearfield and Cambria Streets Railway
* Citizens' East End Street Railway
* Citizens' Passenger Railway
* Citizens Passenger Railway
* Citizens Traction Company
* Citizens' Traction Company of Oil City, Pennsylvania
* Clairton Street Railway
* Coal Castle Electric Railway
* Coatesville Traction Company
* Collegeville Electric Street Railway
* Colonial Street Railway
* Columbia and Montour Electric Railway
* Conestoga Traction Company
* Conneaut and Erie Traction Company
* Conshohocken Railway
* Consolidated Traction Company
* Continental Passenger Railway
* Corry and Columbus Street Railway
* Cumberland Railway
* Danville and Bloomsburg Street Railway
* Danville and Sunbury Transit Company
* Delaware County and Philadelphia Electric Railway
* Doylestown and Easton Street Railway
* Doylestown and Willow Grove Railway
* DuBois Traction Company
* Duquesne Traction Company
* East End Passenger Railway
* East McKeesport Street Railway
* East Reading Electric Railway
* Easton and Bethlehem Transit Company
* Easton, Palmer and Bethlehem Street Railway
* Easton and South Bethlehem Transit Company
* Easton Transit Company
* Electric Traction Company
* Empire Passenger Railway
* Ephrata and Adamstown Railway
* Erie Electric Motor Company
* Erie Rapid Transit Street Railway
* Erie Traction Company
* Fairchance and Smithfield Traction Company
* Fairmount Park and Haddington Passenger Railway
* Fairmount Park Transportation Company
* Federal Street and Pleasant Valley Passenger Railway
* Frankford and Southwark Philadelphia City Passenger Railway
* French Point Street Railway
* Front and Fifth Streets Railway
* Germantown Passenger Railway
* Gettysburg Electric Railway
* Girard Avenue Passenger Railway
* Green and Coates Streets Passenger Railway
* Hagerstown Railway
* Hanover and McSherrystown Street Railway
* Harrisburg City Passenger Railway
* Harrisburg and Hummelstown Street Railway
* Harrisburg and Mechanicsburg Electric Railway
* Harrisburg Traction Company
* Heston, Mantua and Fairmount Passenger Railway
* Highland Grove Traction Company
* Hillcrest Avenue Passenger Railway
* Holmesburg, Tacony and Frankford Electric Railway
* Homestead and Mifflin Street Railway
* Hummelstown and Campbellstown Street Railway
* Huntingdon, Lewistown and Juniata Valley Traction Company
* Huntingdon Street Connecting Passenger Railway
* Irwin–Herminie Traction Company
* Jefferson Traction Company
* Jersey Shore Electric Street Railway
* Johnstown Passenger Railway
* Johnstown Traction Company
* Kessler Street Connecting Passenger Railway
* Kittaning and Leechburg Railways
* Kutztown and Fleetwood Street Railway
* Lackawanna Valley Traction Company
* Lackawanna and Wyoming Valley Railroad (L&WV)
* Lake Erie Traction Company
* Lancaster and Columbia Railway
* Lancaster, Mechanicsburg and New Holland Railway
* Lancaster, Petersburg and Manheim Railway
* Lancaster and Quarryville Street Railway
* Lancaster and Rocky Springs Railway
* Lancaster and Southern Street Railway
* Lancaster, Willow Street, Lampeter and Strasburg Railway
* Lancaster and York Furnace Street Railway
* Latrobe Street Railway
* Lebanon Valley Street Railway
* Lehigh Avenue Railway
* Lehigh Traction Company
* Lehigh Valley Transit Company
* Lewisburg, Milton and Watsontown Passenger Railway
* Lewistown and Reedsville Electric Railway
* Linglestown and Blue Mountain Street Railway
* Lykens and Williams Valley Street Railway
* Mahoning Valley Street Railway
* Meadville and Cambridge Springs Street Railway
* Meadville Traction Company
* Media, Glen Riddle and Rockdale Electric Street Railway
* Media, Middletown, Aston and Chester Electric Railway
* Middletown, Highspire and Steelton Street Railway
* Monongahela Street Railway
* Montgomery and Chester Electric Railway
* Montgomery County Passenger Railway
* Montgomery County Rapid Transit Company
* Montgomery Traction Company
* Montoursville Passenger Railway
* Morningside Electric Street Railway
* Mount Vernon Electric Street Railway
* Mount Washington Street Railway
* Neversink Mountain Railway
* New Castle and Lowell Railway
* New Holland, Blue Ball and Terre Hill Street Railway
* New Homestead Street Railway
* New Jersey and Pennsylvania Traction Company
* Newtown Electric Railway
* Newtown, Langhorne and Bristol Trolley Street Railway
* Newtown and Yardley Street Railway
* Northampton Central Street Railway
* Northampton Traction Company
* Northern Cambria Street Railway
* Northern Electric Street Railway
* Northern Passenger Railway
* Norristown Passenger Railway
* Northumberland County Traction Company
* Oakdale and McDonald Street Railway
* Oil City, Rouseville and Franklin Railway
* Oil City Station Railway
* Olean, Rock City and Bradford Railroad
* Olean, Rock City and Bradford Electric Railroad
* Oley Valley Railway
* Oxford, West Grove and Avondale Street Railway
* Patterson Heights Street Railway
* Pennsylvania and Mahoning Valley Railway
* Pennsylvania and Maryland Street Railway
* Pennsylvania Motor Company
* People's Railway
* People's Passenger Railway
* People's Street Railway of Nanticoke and Newport
* Philadelphia, Bristol and Trenton Street Railway
* Philadelphia, Cheltenham and Jenkintown Passenger Railway
* Philadelphia and Chester Railway
* Philadelphia City Passenger Railway
* Philadelphia and Darby Railway
* Philadelphia and Easton Electric Railway
* Philadelphia and Easton Railway
* Philadelphia and Garrettford Street Railway
* Philadelphia and Grays Ferry Passenger Railway
* Philadelphia, Morton and Swarthmore Street Railway
* Philadelphia Rapid Transit Company
* Philadelphia Suburban Transportation Company
* Philadelphia Traction Company
* Philadelphia and West Chester Traction Company
* Philadelphia and Western Railroad
* Philadelphia and Western Railway
* Philadelphia and Willow Grove Street Railway
* Pittsburgh and Allegheny Valley Railway
* Pittsburgh and Birmingham Traction Company
* Pittsburgh and Charleroi Street Railway
* Pittsburgh, Harmony, Butler and New Castle Railway
* Pittsburgh, McKeesport and Greensburg Railway
* Pittsburgh, McKeesport and Westmoreland Railway
* Pittsburgh Railways
* Pittsburgh Traction Company
* Pittston and Scranton Street Railway
* Plymouth and Larksville Railway
* Port Carbon and Middleport Electric Railway
* Pottstown and Northern Street Railway
* Pottstown Passenger Railway
* Pottstown and Reading Street Railway
* Pottsville and Reading Railway
* Pottsville Union Traction Company
* Quakertown Traction Railway
* Reading City Passenger Railway
* Reading and Southwestern Street Railway
* Reading and Temple Electric Railway
* Reading Traction Company
* Reading Transit and Light Company
* Red Lion and Windsor Street Railway
* Ridge Avenue Connecting Railway
* Ridge Avenue Passenger Railway
* Rohrerstown, Landisville and Mount Joy Street Railway
* Roxborough, Chestnut Hill and Norristown Railway
* Schuylkill Railway
* Schuylkill Electric Railway
* Schuylkill Haven and Orwigsburg Street Railway
* Schuylkill Valley Traction Company
* Scranton Railway
* Scranton and Carbondale Traction Company
* Scranton, Dunmore, and Moosic Lake Railroad
* Scranton and Northeastern Railroad
* Scranton and Pittston Traction Company
* Scranton Traction Company
* Second and Third Streets Passenger Railway
* Seventeenth and Nineteenth Streets Passenger Railway
* Shamokin and Edgewood Electric Railway
* Shamokin Extension Electric Railway
* Shamokin and Mount Carmel Transit Company
* Sharon and New Castle Street Railway
* Sharon and Wheatland Street Railway
* Shingle House Railroad
* Slate Belt Electric Street Railway
* South Bethlehem and Saucon Street Railway
* South Side Passenger Railway
* South Waverly Street Railway
* Southwestern Street Railway
* Stroudsburg Passenger Railway
* Stroudsburg, Water Gap and Portland Railway
* Suburban Rapid Transit Street Railway
* Sunbury and Northumberland Electric Railway
* Susquehanna Traction Company
* Tamaqua and Lansford Street Railway
* Tamaqua and Pottsville Electric Railroad
* Thirteenth and Fifteenth Streets Passenger Railway
* Titusville Electric Traction Company
* Trappe and Limerick Electric Street Railway
* Trenton, New Hope and Lambertville Street Railway
* Tri-State Railway and Electric Company
* Twenty-Second Street and Allegheny Avenue Passenger Railway
* Union Passenger Railway
* Union Traction Company of Philadelphia
* United Traction Company
* United Traction Company of Pittsburgh
* United Traction Street Railway
* Vallamont Traction Company
* Valley Street Railway
* Valley Traction Company
* Walnut Street Connecting Passenger Railway
* Warren County Traction Company
* Warren and Jamestown Street Railway
* Warren Street Railway
* Washington and Canonsburg Railway
* Waverly, Sayre and Athens Traction Company
* Webster, Monessen, Belle Vernon and Fayette City Street Railway
* West Chester Street Railway
* West Chester, Kennett and Wilmington Electric Railway
* West Fairview and Marysville Electric Street Railway
* West Penn Railways
* West Philadelphia Passenger Railway
* West Side Electric Street Railway
* Western New York and Pennsylvania Traction Company
* Westmoreland County Railway
* White Hill and Mechanicsburg Passenger Railway
* Whitehall Street Railway
* Wilkes-Barre Railroad
* Wilkes-Barre Railway
* Wilkes-Barre, Dallas and Harvey's Lake Railway
* Wilkes-Barre and Hazleton Railroad
* Wilkes-Barre and Wyoming Valley Traction Company
* Williamsport Passenger Railway
* Wissahickon Electric Passenger Railway
* Wrightsville and York Street Railway
* Yardley, Morrisville and Trenton Street Railway
* York and Dallastown Electric Railway
* York and Dover Electric Railway
* York Haven Street Railway
* York Street Railway
* Youngsville and Sugar Grove Street Railway

## Private carriers

* Birmingham Coal Company
* Clinton Coal Company
* H.B. Hays and Brothers Coal Railroad
* Lawrence Ore Company
* Leiper Railroad
* Mehard Coal Company
* Perry Lumber Company
* Shawnee Railroad

## Passenger carriers

* Mauch Chunk, Summit Hill and Switchback Railroad
* Mauch Chunk Switchback Railway
* Quakertown & Eastern Railroad
* Valley Forge Scenic Railroad
* Wawa and Concordville Railroad

## Not completed

* Blue Mountain Railroad
* Duncannon, Landisburg and Broad Top Railroad
* Harrisburg and Hamburg Railroad
* Harrisburg and South Mountain Railroad
* Pennsylvania Pacific Railway
* Philipsburg and Johnstown Railroad
* Pittsburgh, Binghamton & Eastern Railroad
* Shermans Valley and Broad Top Railroad
* South Mountain Railroad
* South Pennsylvania Railroad
* South Side Railroad