Pennsylvania Senate, District 12

Pennsylvania's 12th State Senate district
Senator	Maria Collett D – Lower Gwynedd Township
Population (2021)	263,688

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: ^[1]

• 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 [2]	Party	Years	District home	Note
Alexander Dysart	Democratic-Republican	1815 – 1820
Michael Wallace	Democratic-Republican	1819 – 1822
Henry Winter [3]	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 [4]
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 [5]
Peter S. Michler [6]	Anti-Masonic	1835 – 1836
Robert P. Fleming	Democratic	1839 – 1842
Joseph Fearon Quay, Sr.	Whig	1843 – 1844
Jesse C. Horton [7]	Democratic	1851 – 1852
William Harris	Whig	1847 – 1848
Henry Fulton	Democratic	1851 – 1852		Pennsylvania State Senator for the 17th district from 1849 to 1850 [8]
William Fisher Packer	Democratic	1851 – 1852		Pennsylvania State Representative in 1847. 14th Governor of Pennsylvania from 1858 to 1861 [9]
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 [10]
Henry Johnson	Republican	1861 – 1864
Jasper Billings Stark [11]	Democratic	1865 – 1866
Lazarus D. Shoemaker	Republican	1867 – 1870		U.S. Representative for Pennsylvania's 12th congressional district from 1871 to 1875 [12]
Samuel G. Turner	Democratic	1869 – 1870
Jacob George Heilman [13]	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 [14]	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 [15]
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 [16] and resigned on July 2, 1964 [17]
Wilmot E. Fleming	Republican	1964 – 1978		Pennsylvania State Representative for Montgomery County from 1963 to 1964 [18]
Stewart J. Greenleaf	Republican	1979 – 2019	Upper Moreland Township	Pennsylvania State Representative for the 152nd district from 1977 to 1978 [19]
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. [20]

Recent election results

PA Senate election, 2022

Party		Candidate	Votes	%
	Democratic	Maria Collett (incumbent)	76,749	59.7
	Republican	Robert Davies	51,803	40.3
Total votes			128,552	100.0
	Democratic hold

PA Senate election, 2018

Party		Candidate	Votes	%
	Democratic	Maria Collett	62,069	52.7
	Republican	Stewart Greenleaf, Jr.	55,742	47.3
Total votes			117,811	100.0
	Democratic gain from Republican

PA Senate election, 2014

Party		Candidate	Votes	%
	Republican	Stewart Greenleaf (incumbent)	50,319	63.3
	Democratic	Ruth Damsker	29,123	36.7
Total votes			79,442	100.0
	Republican hold

PA Senate election, 2010

Party		Candidate	Votes	%
	Republican	Stewart Greenleaf (incumbent)	61,802	64.0
	Democratic	Ruth Damsker	34,745	36.0
Total votes			96,547	100.0
	Republican hold

References

1. "2021 Final Reapportionment Plan" (PDF). Pennsylvania Department of State . Retrieved November 11, 2022.
2. "Pennsylvania State Senate Historical Biographies". www.legis.state.pa.us. Retrieved April 25, 2019.
3. "Pennsylvania State Senate - Henry Winter Biography". www.legis.state.pa.us. Retrieved April 25, 2019.
4. "KING, Henry, (1790-1861)". www.bioguide.congress.gov. Retrieved October 5, 2019.
5. "Pennsylvania State Senate - Peter Newhard Biography". www.legis.state.pa.us. Retrieved April 26, 2019.
6. "Pennsylvania State Senate - Peter S Michler Biography". www.legis.state.pa.us. Retrieved April 25, 2019.
7. "Pennsylvania State Senator - Jesse C. Horton Biography". www.legis.state.pa.us. Retrieved April 25, 2019.
8. "Pennsylvania State Senate - Henry Fulton Biography". www.legis.state.pa.us. Retrieved November 1, 2019.
9. "Governor William Fisher Packer". Pennsylvania Historical and Museum Commission . Retrieved April 28, 2019.
10. "Pennsylvania State Senate - Jacob Samils Haldeman Biography". www.legis.state.pa.us. Retrieved April 28, 2019.
11. "Pennsylvania State Senate - Jasper Billings Stark". www.legis.state.pa.us. Retrieved April 25, 2019.
12. "SHOEMAKER, Lazarus Denison, (1819-1893)". www.bioguide.congress.gov. Retrieved October 5, 2019.
13. "Pennsylvania State Senate - Jacob George Heilman Biography". www.legis.state.pa.us. Retrieved April 25, 2019.
14. "Pennsylvania State Senate - James Slingluff Boyd Biography". www.legis.state.pa.us. Retrieved April 25, 2019.
15. "Pennsylvania State Senate – Lloyd H Wood Biography". www.legis.state.pa.us. Retrieved April 24, 2019.
16. Cox, Harold (2004). "Pennsylvania Senate - 1963-1964" (PDF). Wilkes University Election Statistics Project . Wilkes University.
17. Cox, Harold (2004). "Pennsylvania Senate - 1963-1964" (PDF). Wilkes University Election Statistics Project . Wilkes University.
18. "Pennsylvania House of Representatives - WILMOT E. FLEMING Biography". www.legis.state.pa.us. Retrieved April 21, 2019.
19. "Pennsylvania House of Representatives - STEWART J. GREENLEAF Biography". www.legis.state.pa.us. Retrieved October 5, 2019.
20. http://www.theintell.com/news/20181106/collett-defeats-greenleaf-jr-flips-12th-district-senate-seat-to-dems

• Cox, Harold (2004). "Legislatures - 1776-2004". Wilkes University Election Statistics Project . Wilkes University.