# Pennsylvania Senate, District 12

Pennsylvania State Senate District 12 includes part of Montgomery County. It is currently represented by Democrat Maria Collett.

## District profile

The district includes the following areas:
* Ambler
* Bryn Athyn
* Franconia Township
* Hatboro
* Hatfield
* Hatfield Township
* Horsham Township
* Lansdale
* Lower Gwynedd Township
* Lower Moreland Township
* Montgomery Township
* Plymouth Township
* Salford Township
* Souderton
* Telford (Montgomery County portion)
* Upper Dublin Township
* Upper Moreland Township
* Whitpain Township
* Worcester Township

## Senators

| Representative | Party | Years | District home | Note |
| Alexander Dysart | Democratic-Republican | 1815 – 1820 | | |
| Michael Wallace | Democratic-Republican | 1819 – 1822 | | |
| Henry Winter | Democratic | 1831 – 1832 | | |
| Henry King | Jackson Democrat | 1825 – 1830 | | U.S. Representative for Pennsylvania's 7th congressional district from 1831 to 1833 and Pennsylvania's 8th congressional district from 1833 to 1835 |
| William G. Scott | Democratic | 1827 – 1830 | | |
| Walter Copake Livingston | Democratic | 1831 – 1832 | | |
| Jacob Kern | Buchanan Democrat | 1831 – 1836 | | |
| Peter Newhard | Democratic | 1833 – 1836 | | Pennsylvania State Representative from 1817 to 1819, 1824 to 1825 and 1829. U.S. Representative for Pennsylvania's 8th congressional district from 1839 to 1843 |
| Peter S. Michler | Anti-Masonic | 1835 – 1836 | | |
| Robert P. Fleming | Democratic | 1839 – 1842 | | |
| Joseph Fearon Quay, Sr. | Whig | 1843 – 1844 | | |
| Jesse C. Horton | Democratic | 1851 – 1852 | | |
| William Harris | Whig | 1847 – 1848 | | |
| Henry Fulton | Democratic | 1851 – 1852 | | Pennsylvania State Senator for the 17th district from 1849 to 1850 |
| William Fisher Packer | Democratic | 1851 – 1852 | | Pennsylvania State Representative in 1847. 14th Governor of Pennsylvania from 1858 to 1861 |
| Jacob Samils Haldeman | Democratic-Republican | 1853 – 1856 | | Pennsylvania State Representative from 1850 to 1851. Minister Resident of the United States at Stockholm from 1861 to 1864 |
| Henry Johnson | Republican | 1861 – 1864 | | |
| Jasper Billings Stark | Democratic | 1865 – 1866 | | |
| Lazarus D. Shoemaker | Republican | 1867 – 1870 | | U.S. Representative for Pennsylvania's 12th congressional district from 1871 to 1875 |
| Samuel G. Turner | Democratic | 1869 – 1870 | | |
| Jacob George Heilman | Republican | 1873 – 1874 | | |
| Williams Anders Yeakle | Republican | 1873 – 1876 | | |
| Jones Detwiler | Democratic | 1877 – 1878 | | |
| Lewis Royer | Republican | 1879 – 1882 | | |
| William Henry Sutton | Democratic | 1883 – 1885 | | |
| Henry Riehle Brown | Republican | 1889 – 1890 | | |
| Arthur D. Markley | Democratic | 1891 – 1894 | | |
| Henry D. Saylor | Republican | 1895 – 1898 | | |
| John Adams Wentz | Democratic | 1899 – 1902 | | |
| Algernon B. Roberts | Republican | 1903 – 1908 | | |
| Thomas B. Harper | Republican | 1909 – 1910 | | |
| Joseph Heacock | Democratic | 1911 – 1914 | | |
| Frank Penrose Croft | Republican | 1915 – 1916 | | |
| James Slingluff Boyd | Republican | 1919 – 1922 | | |
| Wilbur Fletcher Stites | Republican | 1923 – 1926 | | |
| Theodore Lane Bean | Republican | 1935 – 1938 | | |
| Franklin Spencer Edmonds | Republican | 1939 – 1944 | | |
| Lloyd H. Wood | Republican | 1947 – 1950 | | Pennsylvania State Representative for Montgomery County from 1939 to 1946. 20th Lieutenant Governor of Pennsylvania from 1951 to 1955 |
| Henry J. Propert | Republican | 1951 – 1964 | | |
| Morton Fetterolf | Republican | 1964 – 1964 | Blue Bell | Pennsylvania State Representative for the Montgomery County district from 1957 to 1964. Elected to the Pennsylvania State Senate on April 28, 1964 and resigned on July 2, 1964 |
| Wilmot E. Fleming | Republican | 1964 – 1978 | | Pennsylvania State Representative for Montgomery County from 1963 to 1964 |
| Stewart J. Greenleaf | Republican | 1979 – 2019 | Upper Moreland Township | Pennsylvania State Representative for the 152nd district from 1977 to 1978 |
| Maria Collett | Democratic | 2019 – present | Lower Gwynedd Township | On November 6, 2018, Maria Collett (D) defeated Stewart Greenleaf, Jr. in his bid to succeed his retiring father. |

## Recent election results

PA Senate election, 2022 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Maria Collett (incumbent) | 76,749 | 59.7 |
| | Republican | Robert Davies | 51,803 | 40.3 |
| Total votes | Total votes | Total votes | 128,552 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |
PA Senate election, 2018 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Maria Collett | 62,069 | 52.7 |
| | Republican | Stewart Greenleaf, Jr. | 55,742 | 47.3 |
| Total votes | Total votes | Total votes | 117,811 | 100.0 |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |
PA Senate election, 2014 :
| Party | Party | Candidate | Votes | % |
| | Republican | Stewart Greenleaf (incumbent) | 50,319 | 63.3 |
| | Democratic | Ruth Damsker | 29,123 | 36.7 |
| Total votes | Total votes | Total votes | 79,442 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |
PA Senate election, 2010 :
| Party | Party | Candidate | Votes | % |
| | Republican | Stewart Greenleaf (incumbent) | 61,802 | 64.0 |
| | Democratic | Ruth Damsker | 34,745 | 36.0 |
| Total votes | Total votes | Total votes | 96,547 | 100.0 |
| | Republican hold | Republican hold | Republican hold | Republican hold |