President pro tempore of the United States Senate

The President pro tempore of the United States Senate is one of the highest ranking official in the Senate. The current holder is Republican Charles Grassley.

Deceased

 * Richard Henry Lee (June 19, 1794)
 * Henry Tazewell (January 24, 1799)
 * Samuel Livermore (May 18, 1803)
 * William Bingham (February 7, 1804)
 * Ralph Izard (May 30, 1804)
 * Abraham Baldwin (March 4, 1807)
 * Uriah Tracy (July 19, 1807)
 * William Bradford (July 6, 1808)
 * John Laurance (November 11, 1810)
 * Theodore Sedgwick (January 24, 1813)
 * Jacob Read (July 17, 1816)
 * John Milledge (February 9, 1818)
 * John Langdon (September 18, 1819)
 * Joseph Bradley Varnum (September 21, 1821)
 * Jesse Franklin (August 31, 1823)
 * John Gaillard (February 26, 1826)
 * John Eager Howard (October 12, 1827)
 * Stephen Row Bradley (December 9, 1830)
 * James Hillhouse (December 29, 1832)
 * William Harris Crawford Sr. (September 15, 1834)
 * Andrew Gregg (May 20, 1835)
 * Joseph Inslee Anderson (April 17, 1837)
 * Nathaniel Macon (June 29, 1837)
 * John Brown (August 29, 1837)
 * Samuel Smith (April 22, 1839)
 * Hugh Lawson White (April 10, 1840)
 * James Barbour (June 7, 1842)
 * Samuel Lewis Southard (June 26, 1842)
 * John Pope (July 12, 1845)
 * James Ross (November 27, 1847)
 * Ambrose Hundley Sevier (December 31, 1848)
 * William Rufus DeVane King (April 18, 1853)
 * George Poindexter (September 5, 1853)
 * Thomas Jefferson Rusk (July 29, 1857)
 * Littleton Waller Tazewell (May 6, 1860)
 * Willie Person Mangum (September 7, 1861)
 * John Tyler (January 18, 1862)
 * Solomon Foot (March 28, 1866)
 * Lewis Cass (June 17, 1866)
 * Benjamin Fitzpatrick (November 21, 1869)
 * James Murray Mason (April 28, 1871)
 * Jesse David Bright (May 20, 1875)
 * Benjamin Franklin Wade (March 2, 1878)
 * Lafayette Sabine Foster (September 19, 1880)
 * Matthew Hale Carpenter (February 24, 1881)
 * Henry Bowen Anthony (September 2, 1884)
 * David Rice Atchison (January 26, 1886)
 * David Davis (June 26, 1886)
 * Charles Edward Stuart (May 19, 1887)
 * Daniel Clark (January 2, 1891)
 * Allen Granberry Thurman (December 12, 1895)
 * Thomas White Ferry (October 13, 1896)
 * Isham Green Harris (July 8, 1897)
 * Thomas Francis Bayard Sr. (September 28, 1898)
 * John James Ingalls (August 16, 1900)
 * John Sherman (October 22, 1900)
 * Matthew Whitaker Ransom (October 8, 1904)
 * William Pierce Frye (August 8, 1911)
 * Charles Frederick Manderson (September 28, 1911)
 * Augustus Octavius Bacon (February 14, 1914)
 * James Paul Clarke (October 1, 1916)
 * Jacob Harold Gallinger (August 17, 1918)
 * George Franklin Edmunds (February 27, 1919)
 * Frank Bosworth Brandegee (October 14, 1924)
 * Henry Cabot Lodge (November 9, 1924)
 * Albert Baird Cummins (July 30, 1926)
 * Willard Saulsbury Jr. (February 20, 1927)
 * Charles Curtis (February 8, 1936)
 * Key Denson Pittman (November 10, 1940)
 * Byron Patton Harrison (June 22, 1941)
 * George Higgins Moses (December 20, 1944)
 * Carter Glass (May 28, 1946)
 * William Henry King (November 27, 1949)
 * Arthur Hendricks Vandenberg (April 18, 1951)
 * Walter Franklin George (August 4, 1957)
 * Kenneth Douglas McKellar (October 25, 1957)
 * Henry Styles Bridges (November 26, 1961)
 * Carl Trumbull Hayden (January 25, 1972)