2015-Present
Chuck Grassley, R-Iowa

2007-2015
Patrick J. Leahy, D-Vermont

January 15,2003-January 6, 2005
Orrin G. Hatch, R-Utah

January 20-June 5, 2001
Orrin G. Hatch, R-Utah

1995-2001
Orrin G. Hatch, R-Utah

1981-1987
James Strom Thurmond, R-South Carolina

1956-1978
James O. Eastland, D-Mississippi

1953-1955
William Langer, R-North Dakota

1947-1949
Alexander Wiley, R-Wisconsin

1941-1945
Frederick Van Nuys, D-Indiana

1926-1933
George W. Norris, R-Nebraska

1923-1924
Frank B. Brandegee, R-Connecticut

1913-1919
Charles A. Culberson, D-Texas

1904
Orville H. Platt, R-Connecticut

1893-1895
James L. Pugh, D-Alabama

1881-1891
George F. Edmunds, R-Vermont

1872-1879
George F. Edmunds, R-Vermont

1857-1861
James A. Bayard, Jr., D-Delaware

1845-1847
Chester Ashley, D-Arkansas

1838-1841
Garret D. Wall, New Jersey

1833-1836
John M. Clayton, Delaware

1831-1832
William L. Marcy, New York

1828-1829
John Macpherson Berrien, Georgia

1819-1823
William Smith, South Carolina

1817-1818
John J. Crittenden, Kentucky

2005-2007
Arlen Specter, R-Pennsylvania

June 6, 2001-January 15, 2003
Patrick J. Leahy, D-Vermont

January 3 - January 20, 2001
Patrick J. Leahy, D-Vermont

1987-1995
Joseph R. Biden, D-Delaware

1979-1981
Edward M. Kennedy, D-Massachusetts

1955-1956
Harley M. Kilgore, D-West Virginia

1949-1953
Patrick McCarran, D-Nevada

1945-1947
Patrick McCarran, D-Nevada

1933-1941
Henry F. Ashurst, D-Arizona

1924-1926
Albert B. Cummins, R-Iowa

1919-1923
Knute Nelson, R-Minnesota

1905-1912
Clarence D. Clark, R-Wyoming

1895-1904
George F. Hoar, R-Massachusetts

1891-1893
George F. Hoar, R-Massachusetts

1879-1881
Allen G. Thurman, D-Ohio

1861-1872
Lyman Trumbull, R-Illinois

1848-1857
Andrew P. Butler, D-South Carolina

1841-1845
John Macpherson Berrien, Georgia

1836-1838
Felix Grundy, Tennessee

1832-1833
William Wilkins, Pennsylvania

1829-1831
John Rowan, Kentucky

1823-1828
Martin Van Buren, New York

1818-1819
James Burrill, Jr., Rhode Island

1816-1817
Dudley Chase, Vermont