# Pennsylvania's 18th congressional district

Pennsylvania's 18th congressional district was a district including the city of Pittsburgh and parts of surrounding suburbs. A variety of working class and majority black suburbs located to the east of the city were included, such as McKeesport and Wilkinsburg. Also a major part of the district was a number of middle class suburbs that have historic Democratic roots, such as Pleasant Hills and Penn Hills. The district became obsolete following the 2020 United States census. It was largely replaced by Pennsylvania's 12th congressional district.
The district covered much of the area that was the center of the Whiskey Rebellion of the 1790s.

## History
### Pre-2018 boundaries

In February 2018, the Supreme Court of Pennsylvania ruled that the district map violated the state constitution due to gerrymandering and redrew all of the state's congressional districts. The 18th and 14th districts swapped numbers and had their boundaries adjusted for the 2018 elections (after March's special election) and thereafter.
Before the court-ordered redistricting in February 2018, the district was concentrated in the southern suburbs of Pittsburgh. It was predominantly white, although it contained a diverse range of suburbs. It was drawn in such a way that in some locations, neighborhoods and even streets were split between the 18th and the neighboring 12th and 14th districts. In parts of the eastern portion of the district, one side of the street was in the 12th while the other side was in the 18th. In the west, one side of the street was in the 14th while the other side was in the 18th.
Although there were 35,000 more Democrats in the district than Republicans in 2018, the district had been trending increasingly Republican since the mid-1990s; most of the district's state legislators were Republicans. The district was home to many large coal mines and the energy industry was an important employer. The western part of the district contained some rural regions of Washington County, as well as the very wealthy suburbs in the northern part of that county, which tends to be more Republican than the part contained in the neighboring 9th District. The district also contained many of Allegheny County's southern suburbs of Pittsburgh, which ranged from traditionally wealthy areas such as Upper St. Clair to middle-class communities such as Bethel Park and working-class labor towns such as Elizabeth.
The district skewed older and had the second-oldest electorate in the state in 2017.
The district wound along the eastern suburbs at the edge of Allegheny County, including most of the large suburban commercial center of Monroeville, and in western Westmoreland County. Central Westmoreland County, including the city of Greensburg, was also part of the district. It also contained the rural foothills of the county at the district's eastern end. Westmoreland County has become a major Republican stronghold.

### Voter registration

Party enrollment as of October 18, 2021 :
| Party | Party | Total voters | Percentage |
| | Democratic | 328,743 | 62.84% |
| | Republican | 118,874 | 22.72% |
| | Independent/other parties | 75,486 | 14.43% |
| Total | Total | 523,103 | 100% |

## Future

The district became obsolete following the 2020 United States census. It was largely replaced by Pennsylvania's 12th congressional district, while some suburbs of Pittsburgh, such as Wilkinsburg, were redrawn into the 17th district.

## Election results from statewide races

| Year | Office | Results |
| 2008 | President | Obama 63% - 36% |
| 2008 | Attorney General | Morganelli 55% - 45% |
| 2008 | Auditor General | Wagner 78% - 22% |
| 2010 | Senate | Sestak 61% - 39% |
| 2010 | Governor | Onorato 56% - 44% |
| 2012 | President | Obama 63% - 35% |
| 2012 | Senate | Casey Jr. 67% - 33% |
| 2014 | Governor | Wolf 65% - 35% |
| 2016 | President | Clinton 62% - 35% |
| 2016 | Senate | McGinty 62% - 34% |
| 2016 | Attorney General | Shapiro 66% - 34% |
| 2016 | Treasurer | Torsella 65% - 29% |
| 2016 | Auditor General | DePasquale 68% - 27% |
| 2018 | Senate | Casey Jr. 71% - 27% |
| 2018 | Governor | Wolf 72% - 26% |
| 2020 | President | Biden 65% - 34% |
| 2020 | Attorney General | Shapiro 67% - 30% |
| 2020 | Treasurer | Torsella 63% - 33% |
| 2020 | Auditor General | Ahmad 62% - 34% |

## List of members representing the district

| Representatives | Party | Years | Cong ress | Electoral history | District map |
| District established March 4, 1823 ||||||
| Patrick Farrelly (Meadville) | Jacksonian Republican | March 4, 1823 – March 3, 1825 | 18th 19th | Redistricted from the 15th district and re-elected in 1822. Re-elected in 1824. Died. | 1823–1833 [data missing] |
| Patrick Farrelly (Meadville) | Jacksonian | March 4, 1825 – January 12, 1826 | 18th 19th | Redistricted from the 15th district and re-elected in 1822. Re-elected in 1824. Died. | 1823–1833 [data missing] |
| Vacant | Vacant | January 12, 1826 – March 14, 1826 | 19th | | 1823–1833 [data missing] |
| Thomas H. Sill (Erie) | Anti-Jacksonian | March 14, 1826 – March 3, 1827 | 19th | Elected to finish Farrelly's term. Lost re-election. | 1823–1833 [data missing] |
| Stephen Barlow (Meadville) | Jacksonian | March 4, 1827 – March 3, 1829 | 20th | Elected in 1826. Lost re-election. | 1823–1833 [data missing] |
| Thomas H. Sill (Erie) | Anti-Jacksonian | March 4, 1829 – March 3, 1831 | 21st | Elected in 1828. Retired. | 1823–1833 [data missing] |
| John Banks (Mercer) | Anti-Masonic | March 4, 1831 – March 3, 1833 | 22nd | Elected in 1830. Redistricted to the 24th district. | 1823–1833 [data missing] |
| George Burd (Bedford) | Anti-Jacksonian | March 4, 1833 – March 3, 1835 | 23rd | Redistricted from the 13th district and re-elected in 1832. Retired. | 1833–1843 [data missing] |
| Job Mann (Bedford) | Jacksonian | March 4, 1835 – March 3, 1837 | 24th | Elected in 1834. Lost re-election. | 1833–1843 [data missing] |
| Charles Ogle (Somerset) | Anti-Masonic | March 4, 1837 – March 3, 1841 | 25th 26th 27th | Elected in 1836. Re-elected in 1838. Elected in 1840. Died. | 1833–1843 [data missing] |
| Charles Ogle (Somerset) | Whig | March 4, 1841 – May 10, 1841 | 25th 26th 27th | Elected in 1836. Re-elected in 1838. Elected in 1840. Died. | 1833–1843 [data missing] |
| Vacant | Vacant | May 10, 1841 – June 28, 1841 | 27th | | 1833–1843 [data missing] |
| Henry Black (Somerset) | Whig | June 28, 1841 – November 28, 1841 | 27th | Elected to finish Ogle's term. Died. | 1833–1843 [data missing] |
| Vacant | Vacant | November 28, 1841 – December 21, 1841 | 27th | | 1833–1843 [data missing] |
| James M. Russell (Bedford) | Whig | December 21, 1841 – March 3, 1843 | 27th | Elected to finish Black's term. Retired. | 1833–1843 [data missing] |
| Andrew Stewart (Uniontown) | Whig | March 4, 1843 – March 3, 1849 | 28th 29th 30th | Elected in 1843. Re-elected in 1844. Re-elected in 1846. Retired. | 1843–1853 [data missing] |
| Andrew J. Ogle (Somerset) | Whig | March 4, 1849 – March 3, 1851 | 31st | Elected in 1848. Lost re-election. | 1843–1853 [data missing] |
| John L. Dawson (Brownsville) | Democratic | March 4, 1851 – March 3, 1853 | 32nd | Elected in 1850. Redistricted to the 20th district. | 1843–1853 [data missing] |
| John McCulloch (Shaver's Creek) | Whig | March 4, 1853 – March 3, 1855 | 33rd | Elected in 1852. Retired. | 1853–1863 [data missing] |
| John R. Edie (Somerset) | Opposition | March 4, 1855 – March 3, 1857 | 34th 35th | Elected in 1854. Re-elected in 1856. Retired. | 1853–1863 [data missing] |
| John R. Edie (Somerset) | Republican | March 4, 1857 – March 3, 1859 | 34th 35th | Elected in 1854. Re-elected in 1856. Retired. | 1853–1863 [data missing] |
| Samuel S. Blair (Hollidaysburg) | Republican | March 4, 1859 – March 3, 1863 | 36th 37th | Elected in 1858. Re-elected in 1860. Lost re-election. | 1853–1863 [data missing] |
| James T. Hale (Bellefonte) | Independent Republican | March 4, 1863 – March 3, 1865 | 38th | Redistricted from the 15th district and re-elected in 1862. [data missing] | 1863–1873 [data missing] |
| Stephen F. Wilson (Wellsboro) | Republican | March 4, 1865 – March 3, 1869 | 39th 40th | Elected in 1864. Re-elected in 1866. Resigned to become judge of the fourth judicial district of Pennsylvania. | 1863–1873 [data missing] |
| William H. Armstrong (Williamsport) | Republican | March 4, 1869 – March 3, 1871 | 41st | Elected in 1868. Lost re-election. | 1863–1873 [data missing] |
| Henry Sherwood (Wellsboro) | Democratic | March 4, 1871 – March 3, 1873 | 42nd | Elected in 1870. Lost re-election. | 1863–1873 [data missing] |
| Sobieski Ross (Coudersport) | Republican | March 4, 1873 – March 3, 1875 | 43rd | Elected in 1872. Redistricted to the 16th district. | 1873–1883 [data missing] |
| William Stenger (Chambersburg) | Democratic | March 4, 1875 – March 3, 1879 | 44th 45th | Elected in 1874. Re-elected in 1876. Lost re-election. | 1873–1883 [data missing] |
| Horatio G. Fisher (Huntingdon) | Republican | March 4, 1879 – March 3, 1883 | 46th 47th | Elected in 1878. Re-elected in 1880. Retired. | 1873–1883 [data missing] |
| Louis E. Atkinson (Mifflintown) | Republican | March 4, 1883 – March 3, 1893 | 48th 49th 50th 51st 52nd | Elected in 1882. Re-elected in 1884. Re-elected in 186. Re-elected in 1888. Re-elected in 1890. Withdrew from election. | 1883–1893 [data missing] |
| Thaddeus M. Mahon (Chambersburg) | Republican | March 4, 1893 – March 3, 1903 | 53rd 54th 55th 56th 57th | Elected in 1892. Re-elected in 1894. Re-elected in 1896. Re-elected in 1898. Re-elected in 1900. Redistricted to the 17th district. | 1893–1903 [data missing] |
| Marlin E. Olmsted (Harrisburg) | Republican | March 4, 1903 – March 3, 1913 | 58th 59th 60th 61st 62nd | Redistricted from the 14th district and re-elected in 1902. Re-elected in 1904. Re-elected in 1906. Re-elected in 1908. Re-elected in 1910. Retired. | 1903–1913 [data missing] |
| Aaron S. Kreider (Annville) | Republican | March 4, 1913 – March 3, 1923 | 63rd 64th 65th 66th 67th | Elected in 1912. Re-elected in 1914. Re-elected in 1916. Re-elected in 1918. Re-elected in 1920. Lost re-election. | 1913–1933 [data missing] |
| Edward M. Beers (Mount Union) | Republican | March 4, 1923 – April 21, 1932 | 68th 69th 70th 71st 72nd | Elected in 1922. Re-elected in 1924. Re-elected in 1926. Re-elected in 1928. Re-elected in 1930. Died. | 1913–1933 [data missing] |
| Vacant | Vacant | April 11, 1932 – November 8, 1932 | 72nd | | 1913–1933 [data missing] |
| Joseph F. Biddle (Huntingdon) | Republican | November 8, 1932 – March 3, 1933 | 72nd | Elected to finish Beers's term. Retired. | 1913–1933 [data missing] |
| Benjamin K. Focht (Lewisburg) | Republican | March 4, 1933 – March 27, 1937 | 73rd 74th 75th | Elected in 1932. Re-elected in 1934. Re-elected in 1936. Died. | 1933–1943 [data missing] |
| Vacant | Vacant | March 27, 1937 – May 11, 1937 | 75th | | 1933–1943 [data missing] |
| Richard M. Simpson (Huntingdon) | Republican | May 11, 1937 – January 3, 1945 | 75th 76th 77th 78th | Elected to finish Focht's term. Re-elected in 1938. Re-elected in 1940. Re-elected in 1942. Redistricted to the 17th district. | 1933–1943 [data missing] |
| Richard M. Simpson (Huntingdon) | Republican | May 11, 1937 – January 3, 1945 | 75th 76th 77th 78th | Elected to finish Focht's term. Re-elected in 1938. Re-elected in 1940. Re-elected in 1942. Redistricted to the 17th district. | 1933–1953 [data missing] |
| John C. Kunkel (Harrisburg) | Republican | January 3, 1945 – January 3, 1951 | 79th 80th 81st | Redistricted from the 19th district and re-elected in 1944. Re-elected in 1946. Re-elected in 1948. | 1933–1953 [data missing] |
| Walter M. Mumma (Harrisburg) | Republican | January 3, 1951 – January 3, 1953 | 82nd | Elected in 1950. Redistricted to the 16th district. | 1933–1953 [data missing] |
| Richard M. Simpson (Huntingdon) | Republican | January 3, 1953 – January 7, 1960 | 83rd 84th 85th 86th | Redistricted from the 17th district and re-elected in 1952. Re-elected in 1954. Re-elected in 1956. Re-elected in 1958. Died. | 1953–1963 [data missing] |
| Vacant | Vacant | January 7, 1960 – April 26, 1960 | 86th | | 1953–1963 [data missing] |
| Douglas H. Elliot (Chambersburg) | Republican | April 26, 1960 – June 19, 1960 | 86th | Elected to finish Simpson's term. Died. | 1953–1963 [data missing] |
| Vacant | Vacant | June 19, 1960 – November 8, 1960 | 86th | | 1953–1963 [data missing] |
| J. Irving Whalley (Windber) | Republican | November 8, 1960 – January 3, 1963 | 86th 87th | Elected to finish Elliot's term. Also elected to the next term in 1960. Redistricted to the 12th district. | 1953–1963 [data missing] |
| Robert J. Corbett (Pittsburgh) | Republican | January 3, 1963 – April 25, 1971 | 88th 89th 90th 91st 92nd | Redistricted from the 29th district and re-elected in 1962. Re-elected in 1964. Re-elected in 1966. Re-elected in 1968. Re-elected in 1970. Died. | 1963–1973 [data missing] |
| Vacant | Vacant | April 25, 1971 – November 2, 1971 | 92nd | | 1963–1973 [data missing] |
| John Heinz (Pittsburgh) | Republican | November 2, 1971 – January 3, 1977 | 92nd 93rd 94th | Elected to finish Corbett's term. Re-elected in 1972. Re-elected in 1974. Retired to run for U.S. Senator. | 1963–1973 [data missing] |
| John Heinz (Pittsburgh) | Republican | November 2, 1971 – January 3, 1977 | 92nd 93rd 94th | Elected to finish Corbett's term. Re-elected in 1972. Re-elected in 1974. Retired to run for U.S. Senator. | 1973–1983 [data missing] |
| Doug Walgren (Mt. Lebanon) | Democratic | January 3, 1977 – January 3, 1991 | 95th 96th 97th 98th 99th 100th 101st | Elected in 1976. Re-elected in 1978. Re-elected in 1980. Re-elected in 1982. Re-elected in 1984. Re-elected in 1986. Re-elected in 1988. Lost re-election. | 1973–1983 [data missing] |
| Doug Walgren (Mt. Lebanon) | Democratic | January 3, 1977 – January 3, 1991 | 95th 96th 97th 98th 99th 100th 101st | Elected in 1976. Re-elected in 1978. Re-elected in 1980. Re-elected in 1982. Re-elected in 1984. Re-elected in 1986. Re-elected in 1988. Lost re-election. | 1983–1993 [data missing] |
| Rick Santorum (Mt. Lebanon) | Republican | January 3, 1991 – January 3, 1995 | 102nd 103rd | Elected in 1990. Re-elected in 1992. Retired to run for U.S. Senator. | 1983–1993 [data missing] |
| Rick Santorum (Mt. Lebanon) | Republican | January 3, 1991 – January 3, 1995 | 102nd 103rd | Elected in 1990. Re-elected in 1992. Retired to run for U.S. Senator. | 1993–2003 [data missing] |
| Mike Doyle (Swissvale) | Democratic | January 3, 1995 – January 3, 2003 | 104th 105th 106th 107th | Elected in 1994. Re-elected in 1996. Re-elected in 1998. Re-elected in 2000. Redistricted to the 14th district. | 1993–2003 [data missing] |
| Tim Murphy (Pittsburgh) | Republican | January 3, 2003 – October 21, 2017 | 108th 109th 110th 111th 112th 113th 114th 115th | Elected in 2002. Re-elected in 2004. Re-elected in 2006. Re-elected in 2008. Re-elected in 2010. Re-elected in 2012. Re-elected in 2014. Re-elected in 2016. Resigned. | 2003–2013 |
| Tim Murphy (Pittsburgh) | Republican | January 3, 2003 – October 21, 2017 | 108th 109th 110th 111th 112th 113th 114th 115th | Elected in 2002. Re-elected in 2004. Re-elected in 2006. Re-elected in 2008. Re-elected in 2010. Re-elected in 2012. Re-elected in 2014. Re-elected in 2016. Resigned. | 2013–2019 |
| Vacant | Vacant | October 21, 2017 – March 13, 2018 | 115th | | 2013–2019 |
| Conor Lamb (Mt. Lebanon) | Democratic | March 13, 2018 – January 3, 2019 | 115th | Elected to finish Murphy's term. Redistricted to the 17th district. | 2013–2019 |
| Mike Doyle (Pittsburgh) | Democratic | January 3, 2019 – December 31, 2022 | 116th 117th | Redistricted from the 14th district and re-elected in 2018. Re-elected in 2020. Redistricted to the 12th district and resigned early. | 2019–2023 |
| Vacant | Vacant | December 31, 2022 – January 3, 2023 | 117th | | 2019–2023 |
| District dissolved January 3, 2023 ||||||

## Recent election results
### 2012

Pennsylvania's 18th congressional district, 2012 :
| Party | Party | Candidate | Votes | % |
| | Republican | Tim Murphy (incumbent) | 216,727 | 64.0 |
| | Democratic | Larry Maggi | 122,146 | 36.0 |
| Total votes | Total votes | Total votes | 338,873 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 2014

Pennsylvania's 18th congressional district, 2014 :
| Party | Party | Candidate | Votes | % |
| | Republican | Tim Murphy (incumbent) | 166,076 | 100.0 |
| Total votes | Total votes | Total votes | 166,076 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 2016

Pennsylvania's 18th congressional district, 2016 :
| Party | Party | Candidate | Votes | % |
| | Republican | Tim Murphy (incumbent) | 293,684 | 100.0 |
| Total votes | Total votes | Total votes | 293,684 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### 2018 special election

Pennsylvania's 18th congressional district special election, 2018 :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Conor Lamb | 114,102 | 49.86% | +49.86% |
| | Republican | Rick Saccone | 113,347 | 49.53% | −50.47% |
| | Libertarian | Drew Gray Miller | 1,381 | 0.60% | +0.60% |
| Total votes | Total votes | Total votes | 228,830 | 100.00% | |
| Plurality | Plurality | Plurality | 755 | 0.33% | -99.67% |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

### 2018

Pennsylvania's 18th congressional district, 2018 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Mike Doyle (incumbent) | 231,472 | 100.0 |
| Total votes | Total votes | Total votes | 231,472 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2020

Pennsylvania's 18th congressional district, 2020 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Mike Doyle (incumbent) | 266,084 | 69.3 |
| | Republican | Luke Negron | 118,163 | 30.7 |
| Total votes | Total votes | Total votes | 384,247 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |