| class=wikitable |
| valign=bottom
! Representative[{{cite web |title=Pennsylvania State Senate - Senate Historical Biographies |url=https://www.legis.state.pa.us/cfdocs/legis/BiosHistory/serRes.cfm?search&body=S&dist=19 |website=www.legis.state.pa.us |accessdate=16 November 2019}}]
! Party
! Years
! District home
! Note |
| {{party shading/Republican}}
| Samuel Power | Republican | 1815 – 1822 | | Pennsylvania State Senator for the 21st district from 1823 to 1828[{{cite web |title=Pennsylvania State Senate - Samuel Power Biography |url=https://www.legis.state.pa.us/cfdocs/legis/BiosHistory/MemBio.cfm?ID=2465&body=S |website=www.legis.state.pa.us |accessdate=24 November 2019}}] |
| {{party shading/Democratic-Republican}}
| John St. Clair | Democratic-Republican | 1823 – 1826 | | |
| {{party shading/Jackson Democrat}}
| Daniel Sturgeon | Jackson Democrat | 1827 – 1830 | | Pennsylvania State Representative from 1818 to 1824. Treasurer of Pennsylvania from 1836 to 1840. U.S. Senator from Pennsylvania from 1840 to 1851.[{{cite web |title=STURGEON, Daniel, (1789-1878) |url=http://bioguide.congress.gov/scripts/biodisplay.pl?index=S001046 |website=www.bioguide.congress.gov |accessdate=25 November 2019}}] |
| {{party shading/Democratic}}
| Solomon G. Krepps | Democratic | 1831 – 1832 | | |
| {{party shading/Democratic}}
| John A. Sangston | Democratic | 1833 – 1838 | | |
| {{party shading/Whig}}
| Cornelius Darragh | Whig | 1837 – 1838 | | Pennsylvania State Senator for the 21st district from 1835 to 1836. 25th Attorney General of Pennsylvania from 1849 to 1851. U.S. Representative for Pennsylvania's 21st congressional district from 1844 to 1847.[{{cite web |title=Pennsylvania State Senate - Cornelius Darragh Biograph |url=https://www.legis.state.pa.us/cfdocs/legis/BiosHistory/MemBio.cfm?ID=4514&body=S |website=www.legis.state.pa.us |accessdate=24 November 2019}}] |
| {{party shading/Anti-Masonic}}
| William Alexander Purviance | Anti-Masonic | 1835 – 1839 | | |
| {{party shading/Whig}}
| Thomas S. Williams | Whig | 1839 – 1841 | | |
| {{party shading/Whig}}
| Charles Craven Sullivan | Whig | 1841 – 1844 | | Pennsylvania State Senator for the 24th district from 1845 to 1846[{{cite web |title=Pennsylvania State Senate - Charles Craven Sullivan Biography |url=https://www.legis.state.pa.us/cfdocs/legis/BiosHistory/MemBio.cfm?ID=5565&body=S |website=www.legis.state.pa.us |accessdate=24 November 2019}}] |
| {{party shading/Whig}}
| George Darsie | Whig | 1841 – 1842 | | Pennsylvania State Senator for the 24th district from 1843 to 1854[{{cite web |title=Pennsylvania State Senate - George Darsie Biography |url=https://www.legis.state.pa.us/cfdocs/legis/BiosHistory/MemBio.cfm?ID=4516&body=S |website=www.legis.state.pa.us |accessdate=24 November 2019}}] |
| {{party shading/Whig}}
| George Shannon Mullin Sr. | Whig | 1843 – 1844 | | Pennsylvania State Senator for the 15th district from 1841 to 1842[{{cite web |title=Pennsylvania State Senate - George Shannon Mullin, Sr Biography |url=https://www.legis.state.pa.us/cfdocs/legis/BiosHistory/MemBio.cfm?ID=5272&body=S |website=www.legis.state.pa.us |accessdate=24 November 2019}}] |
| {{party shading/Whig}}
| John Morrison | Whig | 1845 | | |
| {{party shading/Whig}}
| Alexander King | Whig | 1847 – 1850 | | |
| {{party shading/Democratic}}
| John Hoge | Democratic | 1851 | | |
| {{party shading/Democratic}}
| Thomas Hoge | Democratic | 1853 – 1856 | | Pennsylvania State Senator for the 26th district from 1863 to 1864 and the 28th district from 1865 to 1866.[{{cite web |title=Pennsylvania State Senate - Thomas Hoge Biography |url=https://www.legis.state.pa.us/cfdocs/legis/BiosHistory/MemBio.cfm?ID=4758&body=S |website=www.legis.state.pa.us |accessdate=24 November 2019}}] |
| {{party shading/Democratic}}
| William Peter Schell | Democratic | 1857 – 1859 | | |
| {{party shading/Republican}}
| Glenni William Scofield | Republican | 1857 – 1858 | | Pennsylvania State Representative from 1849 to 1851. Pennsylvania State Senator for the 11th district from 1859 to 1860. U.S. Representative for Pennsylvania's 19th congressional district from 1863 to 1873. U.S. Representative for Pennsylvania's at-large congressional district from 1873 to 1875[{{cite web |title=Pennsylvania State Senate - Glenni William Scofield Biography |url=https://www.legis.state.pa.us/cfdocs/legis/BiosHistory/MemBio.cfm?ID=5427&body=S |website=www.legis.state.pa.us |accessdate=24 March 2019}}] |
| {{party shading/Republican}}
| Samuel S. Wharton | Republican | 1861 | | |
| {{party shading/Republican}}
| George W. Householder | Republican | 1863 – 1864 | | Pennsylvania State Senator for the 20th district from 1865 to 1866[{{cite web |title=Pennsylvania State Senate - George W Householder Biography |url=https://www.legis.state.pa.us/cfdocs/legis/BiosHistory/MemBio.cfm?ID=4775&body=S |website=www.legis.state.pa.us |accessdate=22 November 2019}}] |
| {{party shading/Republican}}
| Alexander Stutzman | Republican | 1863 – 1866 | | Pennsylvania State Senator for the 20th district from 1867 to 1868[{{cite web |title=Pennsylvania State Senate - Alexander Stutzman Biography |url=https://www.legis.state.pa.us/cfdocs/legis/BiosHistory/MemBio.cfm?ID=5564&body=S |website=www.legis.state.pa.us |accessdate=22 November 2019}}] |
| {{party shading/Democratic}}
| William McSherry | Democratic | 1865 – 1866 | | Pennsylvania State Senator for the 18th district from 1863 to 1864 and the 20th district from 1873 to 1874.[{{cite web |title=Pennsylvania State Senator - William McSherry Biography |url=https://www.legis.state.pa.us/cfdocs/legis/BiosHistory/MemBio.cfm?ID=5212&body=S |website=www.legis.state.pa.us |accessdate=22 November 2019}}] |
| {{party shading/Democratic}}
| Calvin Mark Duncan | Democratic | 1865 – 1871 | | |
| {{party shading/Republican}}
| James Marion Weakley | Republican | 1871 – 1873 | | |
| {{party shading/Republican}}
| Robert L. McClellan | Republican | 1875 | | |
| {{party shading/Republican}}
| James Bowen Everhart | Republican | 1877 – 1892 | | U.S. Representative for Pennsylvania's 6th congressional district from 1883 to 1887[{{cite web |title=Pennsylvania State Senate - James Bowen Everhart Biography |url=https://www.legis.state.pa.us/cfdocs/legis/BiosHistory/MemBio.cfm?ID=4603&body=S |website=www.legis.state.pa.us |accessdate=26 November 2019}}] |
| {{party shading/Republican}}
| Abram D. Harlan | Republican | 1893 – 1904 | | |
| {{party shading/Democratic}}
| Septimus Evans Nivin | Democratic | 1891 – 1892 | | |
| {{party shading/Republican}}
| William Preston Snyder | Republican | 1893 – 1904 | | |
| {{party shading/Republican}}
| Oscar E. Thomson | Republican | 1905 – 1912 | | |
| {{party shading/Republican}}
| John Gyger | Republican | 1913 – 1916 | | |
| {{party shading/Republican}}
| Thomas Lawrence Eyre | Republican | 1919 – 1926 | | |
| {{party shading/Republican}}
| William Hannum Clark | Republican | 1927 – 1936 | | |
| {{party shading/Republican}}
| George B. Scarlett | Republican | 1937 – 1952 | | |
| {{party shading/Republican}}
| Thomas P. Harney | Republican | 1953 – 1960 | | |
| {{party shading/Republican}}
| John H. Ware III | Republican | 1961 – 1970 | | U.S. Representative for Pennsylvania's 9th congressional district from 1970 to 1973 and Pennsylvania's 5th congressional district from 1973 to 1975.[{{cite web |title=Pennsylvania State Senate - John H Ware, III Biography |url=https://www.legis.state.pa.us/cfdocs/legis/BiosHistory/MemBio.cfm?ID=2609&body=S |website=www.legis.state.pa.us |accessdate=17 November 2019}}] |
| {{party shading/Republican}}
| John Stauffer | Republican | 1970 – 1988 | | Pennsylvania State Representative for the Chester County district from 1965 to 1968 and the 157th district from 1969 to 1970. Republican Whip of the Pennsylvania Senate from 1977 to 1982. Republican Leader of the Pennsylvania Senate from 1985 to 1988.[{{cite web |title=Pennsylvania State Senate - John Stauffer Biography |url=https://www.legis.state.pa.us/cfdocs/legis/BiosHistory/MemBio.cfm?ID=5530&body=S |website=www.legis.state.pa.us |accessdate=16 November 2019}}] |
| {{party shading/Republican}}
| Earl M. Baker | Republican | 1989 – 1995 | | Resigned August 31, 1995[{{cite web | last = Cox | first = Harold | title = Pennsylvania Senate - 1995-1996| work = Wilkes University Election Statistics Project| publisher = Wilkes University | year =2004 | url =http://staffweb.wilkes.edu/harold.cox/legis/179S.pdf}}] |
| {{party shading/Republican}}
| Robert J. Thompson | Republican | 1995 – 2006 | | Seated December 4, 1995.[{{cite web | last = Cox | first = Harold | title = Pennsylvania Senate - 1995-1996| work = Wilkes University Election Statistics Project| publisher = Wilkes University | year =2004 | url =http://staffweb.wilkes.edu/harold.cox/legis/179S.pdf}}]
Died Jan 28, 2006 |
| {{party shading/Democratic}}
| Andrew E. Dinniman | Democratic | 2006 – 2020 | West Whiteland Township | Elected May 16, 2006 to fill vacancy.[{{cite web | title = 2006 Special Election for the 19th Senatorial District | work = Commonwealth of PA - Elections Information | publisher = Pennsylvania Department of State | year = 2004 | url = http://www.electionreturns.state.pa.us/ElectionsInformation.aspx?FunctionID=13&ElectionID=23&OfficeID=12 | url-status = dead | archiveurl = https://web.archive.org/web/20081128114828/http://www.electionreturns.state.pa.us/ElectionsInformation.aspx?FunctionID=13&ElectionID=23&OfficeID=12 | archivedate = 2008-11-28 }}] |
| {{party shading/Democratic}}
|Carolyn Comitta
|Democratic
|2021 – present
|West Chester
| |