Pennsylvania

State Governors, 1790 Constitution
1790-1799   Thomas Mifflin
1799-1808   Thomas McKean
1808-1817   Simon Snyder
1817-1820   William Findlay
1820-1823   Joseph Hiester
1823-1829   John Andrew Shulze
1829-1835   George Wolf
1835-1839   Joseph Ritner

State Governors, 1838 Constitution
1839-1845   David Rittenhouse Porter
1845-1848   Francis Rawn Shunk
1848-1852   William Freame Johnston
1852-1855   William Bigler
1855-1858   James Pollock
1858-1861   William Fisher Packer
1861-1867   Andew Gregg Curtin
1867-1873   John White Geary
1873-1876   John Frederick Hartranft

State Governors, 1874 Constitution
1876-1879   John Frederick Hartranf
1879-1883   Henry Martin Hoyt
1883-1887   Robert Emory Pattison
1887-1891   James Addams Beaver
1891-1895   Robert Emory Pattison
1895-1899   Daniel Hartman Hastings
1899-1903   William Alexis Stone
1903-1907   Samuel Whitaker Pennypacker
1907-1911   Edwin Sydney Stuart
1911-1915   John Kinley Tener
1915-1919   Martin Grove Brumbaugh
1919-1923   William Cameron Sproul
1923-1927   Gifford Pinchot
1927-1931   John Stuchell Fisher
1931-1935   Gifford Pinchot
1935-1939   George Howard Earle
1939-1943   Arthur Horace James
1943-1947   Edward Martin
1947-1947   John C. Bell Jr
1947-1951   James H. Duff
1951-1955   John S. Fine
1955-1959   George Michael Leader
1959-1963   David Leo Lawrence
1963-1967   William Warren Scranton
1967-1971   Raymond P. Shafer

State Governors, 1968 Constitution
1971-1979   Milton J. Shapp
1979-1987   Dick Thornburgh
1987-1996   Robert P. Casey
1996-2001   Tom Ridge
2001-2003   Mark S. Schweiker
2003 now   Edward G. Rendell

Reference
Pennsylvania Historical and Museum Commission, Pennsylvania Past to Present