Political party strength in Pennsylvania

Politics in the US state of Pennsylvania

Voter registration by county

Voter registration by congressional district

Legend:

*   40–50%

*   50–60%

*   60–70%

*   70–80%

*   40–50%

*   50–60%

*   60–70%

*   70–80%

## Partisan identification in the electorate

[edit]

On July 29, 2025, the Pennsylvania Department of State reported that there were 3,805,436 (42.9%) registered Democrats, 3,631,663 (40.9%) registered Republicans, 1,105,016 (12.5%) registered unaffiliated and 319,807 (3.6%) registered with other parties.[1]

## Partisan affiliation of elected officials

[edit]

The following table indicates the party of elected officials in the U.S. state of Pennsylvania:

* Governor
* Lieutenant governor
* Attorney general
* State auditor general
* State treasurer

The table also indicates the historical party composition in the:

* State senate
* State house of representatives
* State delegation to the United States Senate
* State delegation to the United States House of Representatives

Following the 2020 Census, Pennsylvania lost one seat in the U.S. House of Representatives. As a result, starting with the general election of 2022, Pennsylvania sent 17 members to the house, and beginning with the general election of 2024 has 19 electoral votes.

### 1777–1790

[edit]

Year | Executive offices | State Legislature | United States Congress | Electoral votes

|
|
|
|

President[a] | Vice President[a] | Executive Council | Senator (Class I) | Senator (Class III) | House
1777  | Thomas Wharton Jr. (CS) | George Bryan (CS) | 51CS, 15RS, 6?  | began in 1789
1778  | George Bryan (CS) | 54CS, 7?, 5RS
1779  | Joseph Reed (CS) | Matthew Smith | 43CS, 26RS, 3?
1780  | William Moore (I) | 51CS, 14RS, 7?
1781  | 41CS, 31RS
1782  | William Moore (I) | James Potter (CS) | 38CS, 36RS
1783  | John Dickinson (RS) | James Ewing (RS) | 39RS, 34CS, 1?
1784  | 44RS, 29CS
1785  | James Irvine (CS) | 56CS, 18RS
1786  | Benjamin Franklin (I) | Charles Biddle | 38RS, 37CS
1787  | 41RS, 28CS
1788  | Peter Muhlenberg | 37RS, 32CS
1789  | Thomas Mifflin (RS) | George Ross | 47RS, 22CS | William Maclay (AA) | Robert Morris (PA) | 6PA, 2AA  | George Washington (I) /
John Adams (F) Y
1790  | 42RS, 27CS

### 1791–1872

[edit]

Year | Executive offices | State Legislature | United States Congress | Electoral votes

|
|
|
|

Governor | Auditor General | Senate | House | Senator (Class I) | Senator (Class III) | House
1791  | Thomas Mifflin (F) | not an elected office | 10F, 8DR  | 36F, 33DR  | vacant | Robert Morris (PA) | 4PA, 4AA  |
1792  | 42F, 27DR  | George Washington (I) /
John Adams (F) Y
1793  | 9F, 9DR[b] | 8AA, 5PA
1794  | 10F, 8DR  | 48F, 21DR  | Albert Gallatin (AA)
James Ross (PA)
1795  | 14F, 10DR  | 49F, 29DR  | James Ross (F) | William Bingham (F) | 8DR, 5F
1796  | 15F, 9DR  | 45F, 33DR  | 7DR, 6F  | Thomas Jefferson (DR) N /
John Adams (F) N
1797  | 44F, 34DR  | 8DR, 5F
1798  | 41F, 37DR
1799  | 47F, 31DR  | 9DR, 4F
1800  | Thomas McKean (DR) | 16F, 8DR  | 41DR, 37F  | Thomas Jefferson (DR) Y /
John Adams (F) N
1801  | 13F, 11DR  | 55DR, 23F  | Peter Muhlenberg (DR) | 10DR, 3F
George Logan (DR)
1802  | 17DR, 8F  | 71DR, 15F
1803  | 21DR, 4F  | 77DR, 9F  | Samuel Maclay (DR) | 18DR
1804  | 24DR, 1F  | 81DR, 5F  | Thomas Jefferson/
George Clinton (DR) Y
1805  | 25DR  | 78DR, 8F  | 17DR, 1F
1806  | Thomas McKean (Quid) | 15Const, 10DR[c] | 53Const, 33DR[c]
1807  | 13Const, 12DR[c] | 46DR, 40Const[c] | Andrew Gregg (DR) | 15DR, 3F
1808  | 14DR, 7Quid, 4F  | 43DR, 23F, 20Quid[d] | James Madison/
George Clinton (DR) Y
1809  | Simon Snyder (DR) | 19DR, 7Quid, 5F  | 74DR, 21F  | Michael Leib (DR) | 16DR, 2F
1810  | 22DR, 6F, 3Quid  | 73DR, 15F, 7Quid
1811  | 21DR, 7F, 3Quid  | 72DR, 17F, 6Quid  | 17DR, 1F
1812  | 26DR, 5F  | 84DR, 11F  | James Madison/
Elbridge Gerry (DR) Y
1813  | 77DR, 18F  | Abner Lacock (DR) | 22DR, 1F
1814  | 25DR, 6F  | 85DR, 10F  | Jonathan Roberts (DR) | 21DR, 2F
1815  | 21DR, 10F  | 71DR, 24F  | 19DR, 4F
1816  | 19DR, 12F  | 71DR, 26F  | James Monroe/
Daniel D. Tompkins (DR) Y
1817  | 57DR, 30F, 10Quid
1818  | William Findlay (DR) | 55DR, 42F[e]
1819  | 20DR, 11F  | 64DR, 33F  | Walter Lowrie (DR)
1820  | 23DR, 6F, 2Quid  | 67DR, 24F, 6Quid  | 18DR, 5F
1821  | Joseph Hiester (DR) | 20DR, 11F  | 52F, 45DR  | vacant | 15DR, 8F
1822  | 17DR, 14F  | 67DR, 30F  | William Findlay (DR) | 16DR, 7F
1823  | 23DR, 10F  | 71DR, 29F  | 20DR, 6F
1824  | John Andrew Shulze (DR) | 21DR, 11F, 1?  | 77DR, 23F  | Andrew Jackson/
John C. Calhoun (DR) N
1825  | 26DR, 7F  | 79DR, 21F  | William Findlay (J) | William Marks (NR) | 14J, 11DR, 1F
1826  | 27DR, 6F  | 77DR, 23F  | 17J, 9DR
1827  | 74DR, 26F  | Isaac D. Barnard (J) | 22J, 3DR, 1NR
1828  | 26J, 7NR  | 76J, 22NR, 2 vac.  | Andrew Jackson/
John C. Calhoun (D) Y
1829  | 89J, 11NR  | 24J, 1A-M, 1NR
1830  | George Wolf (J) | 26J, 6NR, 1A-M | 87J, 13A-M
1831  | 25J, 5NR, 4A-M | 72J, 28A-M | William Wilkins (J) | 17J, 7A-M, 2NR
1832  | 23J, 6A-M, 4NR  | 74J, 22A-M, 4NR  | George M. Dallas (J) | Andrew Jackson/
Martin Van Buren (D) Y
1833  | 22J, 9A-M, 2NR  | 61J, 33A-M, 5NR, 1?  | Samuel McKean (J) | 14J, 10A-M, 4NR
1834  | 24J, 7A-M, 2NR  | 64J, 25A-M, 11NR
1835  | 25J, 6A-M, 2W  | 62J, 27A-M, 11W  | James Buchanan (J) | 17J, 7A-M, 4NR
1836  | Joseph Ritner (A-M) | 23D, 9A-M, 1W  | 72A-M/W, 28D  | Martin Van Buren/
Richard Mentor Johnson (D) Y
1837  | 15D, 12W, 6A-M[f] | 72D, 21A-M, 7W  | Samuel McKean (D) | James Buchanan (D) | 16D, 7A-M, 3W, 2J
1838  | 19W, 14D  | 56D, 44W
1839  | David R. Porter (D) | 18W, 15D  | vacant | 17D, 6W, 5A-M
1840  | 17D, 16W  | 69D, 31W  | Daniel Sturgeon (D) | William Henry Harrison/
John Tyler (W) Y
1841  | 20W, 13D  | 55W, 45D  | 15D, 13W
1842  | 17W, 16D  | 64D, 34W, 2WM
1843  | 19D, 14W  | 57D, 40W, 2WM, 1I  | 12D, 12W
1844  | 22D, 11W  | 58D, 42W  | 13W, 11D  | James K. Polk/
George M. Dallas (D) Y
1845  | Francis R. Shunk (D) | 21D, 11W, 1KN  | 51D, 41W, 8KN  | Simon Cameron (D) | 12D, 10W, 2KN
1846  | 18W, 14D, 1KN  | 67D, 33W
1847  | 56W, 44D  | 16W, 7D, 1KN
1848  | 19W, 14D  | 64D, 36W  | 15W, 8D, 1KN  | Zachary Taylor/
Millard Fillmore (W) Y
William F. Johnston (W)
1849  | 21W, 12D  | 50D, 45W, 5KN[g] | James Cooper (W) | 11W, 11D, 1KN, 1FS
1850  | 17D, 16W  | 59D, 41W
1851  | Ephraim Banks (D) | 16W, 16D, 1I[h] | 60D, 36W, 2ID, 1IW, 1 vac.  | Richard Brodhead (D) | 15D, 9W
1852  | William Bigler (D) | 17W, 16D  | 58D, 37W, 5KN  | Franklin Pierce/
William R. King (D) Y
1853  | 17W, 15D, 1KN  | 62D, 38W  | 16D, 9W
1854  | 18D, 14W, 1KN  | 70D, 26W, 4KN
1855  | James Pollock (W) | 17D, 15W, 1KN  | 46W, 32D, 22KN[i] | vacant | 13O, 7D, 3W, 1R, 1KN
1856  | 17D, 16Fus  | 66D, 34Fus  | William Bigler (D) | James Buchanan/
John C. Breckinridge (D) Y
1857  | Jacob Fry Jr. (D) | 18Fus, 15D  | 53D, 47Fus  | Simon Cameron (R) | 15D, 10R
1858  | William F. Packer (D) | 21D, 12R  | 68D, 30R, 2I  | 14D, 11R
1859  | 17D, 16R  | 67R, 33D  | 20R, 5D
1860  | Thomas E. Cochran (R) | 21R, 12D  | 66R, 34D  | Abraham Lincoln/
Hannibal Hamlin (R) Y
1861  | Andrew Gregg Curtin (R) | 27R, 6D  | 71R, 29D  | David Wilmot (R) | Edgar Cowan (R) | 19R, 6D
1862  | 23R, 10D  | 51D, 49R  | 17R, 8D
1863  | Isaac Slenker (D) | 21R, 12D  | 55D, 45R  | Charles R. Buckalew (D) | 12R, 12D
1864  | 17R, 16D  | 52R, 48D  | Abraham Lincoln/
Andrew Johnson (NU) Y
1865  | 20R, 13D  | 64R, 36D  | 15R, 9D
1866  | John F. Hartranft (R) | 21R, 12D  | 67R, 33D  | 16R, 8D
1867  | John W. Geary (R) | 62R, 38D  | Simon Cameron (R) | 18R, 6D
1868  | 19R, 14D  | 54R, 46D  | Ulysses S. Grant/
Schuyler Colfax (R) Y
1869  | 18R, 15D  | 62R, 38D  | John Scott (R) | 16R, 8D
1870  | 60R, 40D  | 18R, 6D
1871  | 17D, 16R  | 55R, 45D  | 13R, 11D
1872  | 17R, 16D  | 63R, 39D, 1I  | Ulysses S. Grant/
Henry Wilson (R) Y
C. D. Brigham

### 1873–1978

[edit]

Year | Executive offices | State Legislature | United States Congress | Electoral votes

|
|
|
|

Governor | Lieutenant
Governor | Auditor
General | Treasurer | Senate | House | Senator
(Class I) | Senator
(Class III) | House
1873  | John F. Hartranft (R) | no such office | Harrison Allen (R) | Robert W. Mackey (R) | 18R, 14D, 1LR  | 60R, 39D, 1I  | John Scott (R) | Simon Cameron (R) | 22R, 5D  |
1874  | 20R, 12D, 1LR  | 57R, 43D
1875  | John Latta (D) | Justus F. Temple (D) | 30R, 20D[j] | 110D, 89R, 1I, 1Proh[k] | William A. Wallace (D) | 17D, 10R
1876  | Henry Rawle (R) | 29R, 21D  | 18D, 9R  | Rutherford B. Hayes/
William A. Wheeler (R) Y
1877  | 31R, 19D  | 119R, 81D, 1ID  | J. Donald Cameron (R) | 17R, 10D
1878  | William P. Schell (D) | Amos C. Noyes (D)
1879  | Henry M. Hoyt (R) | Charles W. Stone (R) | 32R, 17D, 1GB  | 107R, 77D, 17GB  | 17R, 8D, 2GB
1880  | Samuel Butler (R) | James A. Garfield/
Chester A. Arthur (R) Y
1881  | John A. Lemon (R) | 121R, 78D, 1GB, 1Fus-D | John I. Mitchell (R) | 18R, 7D, 2GB
1882  | Silas M. Bailey (R)
1883  | Robert E. Pattison (D) | Chauncey Forward Black (D) | 30R, 20D  | 113D, 88R  | 15R, 12D, 1GB
1884  | Jerome B. Niles (R) | William Livsey (R) | James G. Blaine/
John A. Logan (R) N
1885  | 31R, 19D  | 140R, 60D, 1GBR  | 20R, 8D
1886  | Matthew Quay (R)
1887  | James A. Beaver (R) | William T. Davies (R) | A. Wilson Norris[l] | William Livsey (R) | 34R, 16D  | 131R, 69D, 1GBL  | Matthew Quay (R)
1888  | William B. Hart (R) | Benjamin Harrison/
Levi P. Morton (R) Y
Thomas McCamant (R)
1889  | William Livsey (R) | 144R, 60D  | 21 R, 7D
1890  | Henry K. Boyer (R)
1891  | Robert E. Pattison (D) | Louis Arthur Watres (R) | 31R, 19D  | 122R, 79D, 3Fus  | 18R, 10D
1892  | David McMurtrie Gregg (R) | John Wallace Morrison (R) | 17R, 11D  | Benjamin Harrison/
Whitelaw Reid (R) N
1893  | 33R, 17D  | 135R, 69D  | 20R, 10D
1894  | Samuel Jackson (R)
1895  | Daniel H. Hastings (R) | Walter Lyon (R) | Amos H. Mylin | 44R, 6D  | 175R, 29D  | 28R, 2D
1896  | Benjamin J. Haywood (R) | William McKinley/
Garret Hobart (R) Y
1897  | 172R, 32D  | Boies Penrose (R)[l] | 27R, 3D
1898  | Levi G. McCauley (R) | James S. Beacom (R)
1899  | William A. Stone (R) | John P. S. Gobin (R) | 37R, 13D  | 127R, 71D, 6Fus  | vacant | 20R, 10D
1900  | James E. Barnett (R) | William McKinley/
Theodore Roosevelt (R) Y
1901  | Edmund B. Hardenbergh (R) | 38R, 12D  | 156R, 48D  | Matthew Quay (R) | 26R, 4D
1902  | Frank G. Harris (R)
1903  | Samuel W. Pennypacker (R) | William M. Brown (R) | 40R, 10D  | 160R, 44D  | 28R, 4D
1904  | William Preston Snyder (R) | William L. Mathues (R) | 29R, 3D  | Theodore Roosevelt/
Charles W. Fairbanks (R) Y
Philander C. Knox (R)
1905  | 187R, 17D  | 31R, 1D
1906  | William H. Berry (D)
1907  | Edwin Sydney Stuart (R) | Robert S. Murphy (R) | Robert K. Young (R) | 157R, 50D  | 25R, 7D
1908  | John O. Sheatz (R) | William Howard Taft/
James S. Sherman (R) Y
1909  | 39R, 11D  | 173R, 34D  | George T. Oliver (R) | 27R, 5D
1910  | A. E. Sisson (R)
1911  | John K. Tener (R) | John Merriman Reynolds (R) | Charles Frederick Wright (R) | 38R, 18D  | 162R, 44D, 1Soc  | 23R, 9D
1912  | 24R, 8D  | Theodore Roosevelt/
Hiram Johnson (Prog) N
1913  | Archibald W. Powell (R) | Robert K. Young (R) | 34R, 13D, 3Prog  | 127R, 57D, 14Prog, 9Wash  | 22R, 12D, 2Prog
1914
1915  | Martin Grove Brumbaugh (R) | Frank B. McClain (R) | 38R, 11D, 1Prog  | 164R, 41D, 1Soc, 1Prog  | 30R, 6D
1916  | Charles Evans Hughes/
Charles W. Fairbanks (R) N
1917  | Charles A. Snyder (R) | Harmon M. Kephart (R) | 39R, 10D, 1Prog  | 169R, 37D, 1Soc, 1Prog  | Philander C. Knox (R) | 29R, 6D, 1Prog
1918  | 28R, 7D, 1Prog
1919  | William Cameron Sproul (R) | Edward E. Beidleman (R) | 44R, 6D  | 184R, 23D  | 29R, 7D
1920  | 30R, 6D  | Warren G. Harding/
Calvin Coolidge (R) Y
1921  | Samuel S. Lewis (R) | Charles A. Snyder (R) | 47R, 3D  | 193R, 14D  | 35R, 1D
William E. Crow (R)
1922  | George W. Pepper (R)
David A. Reed (R)
1923  | Gifford Pinchot (R) | David J. Davis (R) | 43R, 7D  | 167R, 41D  | 30R, 6D
1924  | Calvin Coolidge/
Charles G. Dawes (R) Y
1925  | Edward Martin (R) | Samuel S. Lewis (R) | 42R, 8D  | 194R, 14D  | 36R
1926
1927  | John Stuchell Fisher (R) | Arthur James (R) | 45R, 5D  | 191R, 17D  | William Scott Vare (R) | 34R, 2D
1928  | Herbert Hoover/
Charles Curtis (R) Y
1929  | Charles A. Waters (R) | Edward Martin (R) | 44R, 6D  | 192R, 16D  | 35R, 1D
1930  | Joseph R. Grundy (R) | 36R
1931  | Gifford Pinchot (R) | Edward C. Shannon (R) | 46R, 4D  | 184R, 22D, 2Soc  | James J. Davis (R) | 33R, 3D
1932  | Herbert Hoover/
Charles Curtis (R) N
1933  | Frank E. Baldwin (R) | Charles A. Waters (R) | 43R, 7D  | 140R, 65D, 2I, 1Soc  | 23R, 11D
1934  | 22R, 12D
1935  | George Howard Earle III (D) | Thomas Kennedy (D) | 31R, 19D  | 117D, 89R, 2Soc  | Joseph F. Guffey (D) | 23D, 11R
1936  | Franklin D. Roosevelt/
John Nance Garner (D) Y
1937  | Warren R. Roberts (D) | F. Clair Ross (D) | 34D, 16R  | 154D, 54R  | 27D, 7R
1938
1939  | Arthur James (R) | Samuel S. Lewis (R) | 27R, 23D  | 129R, 79D  | 19R, 15D
1940  | Franklin D. Roosevelt/
Henry A. Wallace (D) Y
1941  | F. Clair Ross (D) | G. Harold Wagner (D) | 32R, 18D  | 126D, 82R  | 19D, 15R
1942
1943  | Edward Martin (R) | John C. Bell Jr. (R) | 132R, 76D  | 20R, 13D
1944  | 21R, 12D  | Franklin D. Roosevelt/
Harry S. Truman Y
1945  | Ted A. Rosenberg | Ramsey S. Black (D) | 109R, 99D  | Francis J. Myers (D) | 18R, 15D
G. Harold Wagner (D)
1946  | 19R, 14D
1947  | John C. Bell Jr. (R) | vacant | 34R, 16D  | 170R, 38D  | Edward Martin (R) | 28R, 5D
James H. Duff (R) | Daniel Strickler (R)
1948  | Thomas E. Dewey/
Earl Warren (R) N
1949  | Weldon Brinton Heyburn (R) | Charles R. Barber (R) | 35R, 15D  | 117R, 91D  | 17R, 16D
1950
1951  | John S. Fine (R) | Lloyd H. Wood (R) | 30R, 20D  | 120R, 88D  | James H. Duff (R) | 20R, 13D
1952  | Dwight D. Eisenhower/
Richard Nixon (R) Y
1953  | Charles R. Barber (R) | Weldon Brinton Heyburn (R) | 32R, 18D  | 110R, 98D  | 19R, 11D
1954
1955  | George M. Leader (D) | Roy E. Furman (D) | 26R, 24D  | 112D, 98R  | 16R, 14D
1956
1957  | Charles C. Smith (R) | Robert F. Kent (R) | 27R, 23D  | 126R, 84D  | Joseph S. Clark Jr. (D) | 17R, 13D
1958
1959  | David L. Lawrence (D) | John Morgan Davis (D) | 28R, 22D  | 108D, 102R  | Hugh Scott (R) | 16D, 14R
1960  | John F. Kennedy/
Lyndon B. Johnson (D) Y
1961  | Thomas Z. Minehart (D) | Grace M. Sloan (D) | 25D, 25R[m] | 109D, 101R  | 16R, 14D
1962
1963  | William Scranton (R) | Raymond P. Shafer (R) | 27R, 23D  | 108R, 102D  | 14R, 13D
1964  | Lyndon B. Johnson/
Hubert Humphrey (D) Y
1965  | Grace M. Sloan (D) | Thomas Z. Minehart (D) | 28R, 22D  | 116D, 93R  | 15D, 12R
1966
1967  | Raymond P. Shafer (R) | Raymond J. Broderick (R) | 27R, 23D  | 104R, 99D  | 14D, 13R
1968  | Hubert Humphrey/
Edmund Muskie (D) N
1969  | Bob Casey Sr. (D) | Grace M. Sloan (D) | 107D, 96R  | Richard Schweiker (R)
1970
1971  | Milton Shapp (D) | Ernest Kline (D) | 26D, 24R  | 113D, 90R
1972  | Richard Nixon/
Spiro Agnew (R) Y
1973  | 107R, 96D  | 13D, 12R
1974
1975  | 30D, 20R  | 113D, 90R  | 14D, 11R
1976  | Jimmy Carter/
Walter Mondale (D) Y
1977  | Al Benedict (D) | Robert E. Casey (D) | 31D, 19R  | 118D, 85R  | John Heinz (R) | 17D, 8R
1978

### 1978–present

[edit]

Year | Executive offices | State Legislature | United States Congress | Electoral votes

|
|
|
|

Governor | Lieutenant
Governor | Attorney
General | Auditor
General | Treasurer | Senate | House | Senator
(Class I) | Senator
(Class III) | House
1979  | Dick Thornburgh (R) | William Scranton III (R) | not an elected office | Al Benedict (D) | Robert E. Casey (D) | 28D, 22R  | 102R, 101D  | John Heinz (R)[l] | Richard Schweiker (R) | 15D, 10R  |
1980  | Ronald Reagan/
George H. W. Bush (R) Y
1981  | LeRoy Zimmerman (R) | R. Budd Dwyer (R)[l] | 26R, 24D  | 103R, 100D  | Arlen Specter (R) | 13D, 12R
1982
1983  | 27R, 23D  | 103D, 100R  | 13D, 10R
1984
1985  | Donald A. Bailey (D)
1986
1987  | Bob Casey Sr. (D) | Mark Singel (D) | G. Davis Greene Jr. (D)[n] | 26R, 24D  | 102D, 101R  | 12D, 11R
1988  | George H. W. Bush/
Dan Quayle (R) Y
1989  | Ernie Preate (R)[o] | Barbara Hafer (R) | Catherine Baker Knoll (D) | 27R, 23D  | 104D, 99R
1990
1991  | 26R, 24D  | 107D, 96R  | 12R, 11D
Harris Wofford (D)[p]
1992  | Bill Clinton/
Al Gore (D) Y
1993  | 25D, 25R[q] | 105D, 98R  | 11D, 10R
1994  | 26R, 24D[r]
1995  | Tom Ridge (R) | Mark Schweiker (R) | 29R, 21D  | 102R, 101D  | Rick Santorum (R)
Tom Corbett (R)[n]
1996
1997  | D. Michael Fisher (R)[o] | Bob Casey Jr. (D) | Barbara Hafer (R) | 30R, 20D  | 104R, 99D
1998
1999  | 103R, 100D
2000  | Al Gore/
Joe Lieberman (D) N
2001  | 104R, 99D  | 11R, 10D
Mark Schweiker (R)[s] | Robert Jubelirer (R)[t]
2002
2003  | Ed Rendell (D) | Catherine Baker Knoll (D)[l] | Barbara Hafer (D) | 29R, 21D  | 110R, 93D  | 12R, 7D
2004  | John Kerry/
John Edwards (D) N
Jerry Pappert (R)[n]
2005  | Tom Corbett (R) | Jack Wagner (D) | Bob Casey Jr. (D)[u] | 30R, 20D  | 110R, 93D
2006
2007  | Robin Wiessmann (D)[n] | 29R, 21D  | 102D, 101R[v] | Bob Casey Jr. (D) | 11D, 8R
2008  | Barack Obama/
Joe Biden (D) Y
Joe Scarnati (R)[t]
2009  | Rob McCord (D)[o][7] | 30R, 20D  | 104D, 99R  | 12D, 7R
Arlen Specter (D)[8]
2010
2011  | Tom Corbett (R) | Jim Cawley (R) | Linda L. Kelly (R)[n][w] | 112R, 91D  | Pat Toomey (R) | 12R, 7D
2012
2013  | Kathleen Kane (D)[o][9] | Eugene DePasquale (D) | 27R, 23D  | 111R, 92D  | 13R, 5D
2014
2015  | Tom Wolf (D) | Mike Stack (D) | Tim Reese (I)[n] | 30R, 20D  | 120R, 83D
2016  | 31R, 19D  | 119R, 84D  | Donald Trump/
Mike Pence (R) Y
Bruce Beemer (D)[n][x]
2017  | Josh Shapiro (D) | Joe Torsella (D) | 34R, 16D  | 121R, 82D
2018  | 10R, 8D[y]
2019  | John Fetterman (D) | 28R, 22D[z] | 110R, 93D  | 9R, 9D
2020  | 28R, 21D, 1I[aa] | Joe Biden/
Kamala Harris (D) Y
2021  | Timothy DeFoor (R) | Stacy Garrity (R) | 28R, 21D, 1I  | 113R, 90D
2022
2023  | Josh Shapiro (D) | Austin Davis (D) | Michelle Henry (D)[n] | 28R, 22D  | 102D, 101R  | John Fetterman (D) | 9D, 8R
2024  | Donald Trump/
JD Vance (R) Y
2025  | Dave Sunday (R) | 27R, 23D[ab] | Dave McCormick (R) | 10R, 7D
Key to party colors and abbreviations for members of the U.S. Congress and other politicians or officials  | Alaskan Independence (AKIP)

Know Nothing (KN)
American Labor (AL)
Anti-Jacksonian (Anti-J)
National Republican (NR)
Anti-Administration (AA)
Anti-Masonic (Anti-M)
Conservative (Con)
Covenant (Cov)
| Democratic (D)

Democratic–Farmer–Labor (DFL)
Democratic–NPL (D-NPL)
Dixiecrat (Dix),
States' Rights (SR)
Democratic-Republican (DR)
Farmer–Labor (FL)
Federalist (F)
Pro-Administration (PA)
| Free Soil (FS)

Fusion (Fus)
Greenback (GB)
Independence (IPM)
Independent Democrat (ID)
Independent Republican (IR)
Jacksonian (J)
Liberal (Lib)
| Libertarian (L)

National Union (NU)
Nonpartisan League (NPL)
Nullifier (N)
Opposition Northern (O)
Opposition Southern (O)
Populist (Pop)
Progressive (Prog)
| Prohibition (Proh)

Readjuster (Rea)
Republican (R)
Silver (Sv)
Silver Republican (SvR)
Socialist (Soc)
Union (U)
Unconditional Union (UU)
| Vermont Progressive (VP)

Whig (W)
Independent (I)
Nonpartisan (NP)

1. ^ a b From 1777 to 1790, Pennsylvania had a series of presidents and vice presidents of The Supreme Council.
2. ^ A Federalist, Anthony Morris, was elected as Speaker of the chamber.[2]
3. ^ a b c d The Federalists and Quids, who were moderates within the Democratic-Republican Party, formed a coalition in the 1805 election and called themselves the Constitutionalists; when they achieved a majority, they organized the chamber together, and this coalition continued in succeeding elections.[3]
4. ^ Elected Nathaniel Boileau, a Democratic-Republican, as Speaker.
5. ^ Some sources begin to cite the Federalists at the state level as Independent Republicans starting with this year.
6. ^ The Whigs and Anti-Masons formed a coalition to govern the chamber.
7. ^ A Democrat, William F. Packer, was elected as Speaker, and Democrats organized the chamber.
8. ^ A Whig, Benjamin Matthias, was elected as Speaker of the Senate on the 7th Ballot.[4]
9. ^ A Whig, Henry K. Strong, was elected in a coalition between the Whigs and Know-Nothings.
10. ^ Effective with the Constitution of 1874, Senators began to serve four-year terms, after a transition period starting with the election of 1874 and continuing through the election of 1876.
11. ^ Effective with the Constitution of 1874, House members began to serve two-year terms starting with the election of 1874.
12. ^ a b c d e Died in office.
13. ^ Due to the Democratic Lt. Governor casting the deciding vote, the Democrats took control of the chamber.
14. ^ a b c d e f g h Appointed to fill a vacancy.
15. ^ a b c d Resigned.
16. ^ Appointed by Governor Casey in May 1991 after Heinz's death and won a special election in November 1991 for the remainder of the term.
17. ^ Sen. Frank Pecora switched parties from Republican to Democratic, but in the case of ties, the Lt. Governor casts the deciding vote, and as a Democrat, he gave his party control.[5]
18. ^ After months of turmoil, a special election result was thrown out that had been won by Democrat William G. Stinson, who had succeeded fellow Democrat Francis Lynch. A federal judge awarded the election to Republican Bruce Marks. Additionally, Democrat Eugene Scanlon's death in March 1994 gave Republicans control.[6]
19. ^ As lieutenant governor, filled vacancy in office of governor.
20. ^ a b As president pro tempore of the state Senate, filled vacancy in office of lieutenant governor.
21. ^ Resigned following election to U.S. Senate.
22. ^ Elected a Republican Speaker.
23. ^ William H. Ryan Jr. served as acting Attorney General from January (when Corbett was inaugurated as governor) until Kelly's nomination was confirmed by the State Senate.
24. ^ Republican Deputy Attorney General Bruce Castor served for 13 days from August 17–30 between Kane's resignation and Beemer's assumption of the office.
25. ^ Democrat Conor Lamb won a special election to fill a vacancy for Pennsylvania's 18th Congressional District, left by Republican Timothy F. Murphy's resignation. Democrats Mary Gay Scanlon and Susan Wild won special elections to fill seats left vacant by Republicans Pat Meehan/
Charlie Dent respectively.
26. ^ Republican Don C. White resigned in February 2019 and Republican Joe Pittman was elected in May 2019 to succeed him.[citation needed] Also, Republican Mike Folmer resigned in September 2019 and Republican Dave Arnold was elected to succeed him in a January 2020 special election.[10][11]
27. ^ John Yudichak (District 14) switched parties from Democratic to Independent in November 2019 and began caucusing with the Republican majority.[12]
28. ^ Ryan Aument (District 36) resigned December 31, 2024 to become State Director to U.S. Senator Dave McCormick. James Andrew Malone was elected in a special election on March 25, 2025, flipping the seat to Democrats.

## See also

[edit]

* Democratic Party of Pennsylvania
* Elections in Pennsylvania
* Green Party of Pennsylvania
* Libertarian Party of Pennsylvania
* Politics of Pennsylvania
* Republican Party of Pennsylvania

## References

[edit]

1. ^ "Voting and Election Statistics, Current Registration Statistics". Pennsylvania Department of State. Retrieved July 29, 2025.
2. ^ "Anthony Morris". The official website for the Pennsylvania General Assembly. Retrieved 2021-06-24.
3. ^ "John Randolph and the Old Republicans". Boundless. July 21, 2015. Archived from the original on September 19, 2015.
4. ^ Journal of the Senate of the Commonwealth of Pennsylvania. 1851. pp. 8–9.
5. ^ "Frank A Pecora". Pennsylvania General Assembly. Retrieved January 3, 2017.
6. ^ Eshleman Jr., Russell E. (March 11, 1994). "Pa. Sen. Scanlon Dies, Leaving Senate in Grief, GOP in Lead Regardless of the Stinson Outcome, the Republicans Are Now the Majority and Can Control the Action". Philadelphia Inquirer. p. B06. Archived from the original on January 3, 2016.
7. ^ Levy, Marc (January 31, 2015). "Pennsylvania treasurer Rob McCord says he will plead guilty to federal charges". Lancaster Online. Associated Press. Retrieved May 20, 2015.
8. ^ Switched parties from Republican to Democratic on April 28, 2009.
9. ^ Cullinane, Susannah; Ellis, Ralph (2016-08-16). "Pennsylvania Attorney General Kathleen Kane resigning". CNN Politics. Retrieved 2021-06-24.
10. ^ "PoliticsPA". Retrieved 2021-06-24.
11. ^ "Dave Arnold wins 48th Senatorial District special election". Local 21 News. 2020-01-14. Retrieved 2021-06-24.
12. ^ "Pa. Dems lose a state senator: John Yudichak of Luzerne County declares himself independent, will caucus with GOP". pennlive. 2019-11-19. Retrieved 2021-06-24.

* v
* t
* e

Political party strength in U.S. states

States|

* Alabama
* Alaska
* Arizona
* Arkansas
* California
* Colorado
* Connecticut
* Delaware
* Florida
* Georgia
* Hawaii
* Idaho
* Illinois
* Indiana
* Iowa
* Kansas
* Kentucky
* Louisiana
* Maine
* Maryland
* Massachusetts
* Michigan
* Minnesota
* Mississippi
* Missouri
* Montana
* Nebraska
* Nevada
* New Hampshire
* New Jersey
* New Mexico
* New York
* North Carolina
* North Dakota
* Ohio
* Oklahoma
* Oregon
* Pennsylvania
* Rhode Island
* South Carolina
* South Dakota
* Tennessee
* Texas
* Utah
* Vermont
* Virginia
* Washington
* West Virginia
* Wisconsin
* Wyoming

Federal district|

Washington, D.C.

Territories|

* American Samoa
* Guam
* Northern Mariana Islands
* Puerto Rico
* U.S. Virgin Islands

List of third-party and independent performances in United States elections
*[CS]: Constitutionalist Society
*[RS]: Republican Society
*[WM]: Workingmen's Party
*[v]: View this template
*[t]: Discuss this template
*[e]: Edit this template