# List of presidents pro tempore of the United States Senate

The president pro tempore of the United States Senate (also president pro tem) is the second-highest-ranking official of the United States Senate. Article I, Section Three of the United States Constitution provides that the vice president of the United States, despite not being a senator, is the president of the Senate. It also establishes that the Senate must choose a president pro tempore to act in the absence of the vice president:
   The Senate shall choose their other Officers, and also a President pro tempore, in the absence of the Vice President, or when he [or she] shall exercise the Office of President of the United States.
In practice, neither the vice president nor the president pro tempore usually presides; instead, the duty of presiding officer is rotated among junior senators of the majority party to give them experience in parliamentary procedure.
The president pro tempore is third in the line of succession to the presidency, after the vice president and the speaker of the House of Representatives and ahead of the secretary of state.
Since 1890, the president pro tempore has held the office continuously until the election of another president pro tempore, and since 1945 the most senior senator in the majority party has generally been chosen. During most of the 62nd Congress, following William Frye's resignation on April 27, 1911, five senators—Augustus Bacon, Charles Curtis, Jacob Gallinger, Henry Cabot Lodge, and Frank Brandegee—alternated as president pro tempore.
Since the office was created in 1789, 92 individuals, from 39 of the 50 states, have served as president pro tempore of the Senate. The current president pro tempore is Chuck Grassley of Iowa, who assumed office on January 3, 2025, at the start of the 119th Congress. In 2001, the honorary title of president pro tempore emeritus was created, and it has been given to a senator of the minority party who has previously served as president pro tempore. This title is currently held by Patty Murray of Washington.
Every president pro tempore but one has been a member of a political party or faction; the number affiliated with each is:
    Democratic – 32; Republican – 25; Democratic-Republican – 15; Federalist – 10; Jacksonian – 3; Anti-Administration – 2; National Republican – 2; Pro-Administration – 2; Whig – 2; Independent – 1.

## Presidents pro tempore

| Name | State | Party | Term | Congress |
| John Langdon | New Hampshire | Pro-Administration | April 6–21, 1789 | 1st Congress |
| John Langdon | New Hampshire | Pro-Administration | August 7–9, 1789 | 1st Congress |
| Richard Henry Lee | Virginia | Anti-Administration | April 18 – October 8, 1792 | 2nd Congress |
| John Langdon | New Hampshire | Pro-Administration | November 5 – December 4, 1792 | 2nd Congress |
| John Langdon | New Hampshire | Pro-Administration | March 1–3, 1793 | 2nd Congress |
| John Langdon | New Hampshire | Pro-Administration | March 4 – December 2, 1793 | 3rd Congress |
| Ralph Izard | South Carolina | Pro-Administration | May 31 – November 9, 1794 | 3rd Congress |
| Henry Tazewell | Virginia | Anti-Administration | February 20, 1795 – June 7, 1795 | 3rd Congress |
| Henry Tazewell | Virginia | Democratic-Republican | February 20, 1795 – June 7, 1795 | 4th Congress |
| Henry Tazewell | Virginia | Democratic-Republican | December 7–8, 1795 | 4th Congress |
| Samuel Livermore | New Hampshire | Federalist | May 6 – December 4, 1796 | 4th Congress |
| William Bingham | Pennsylvania | Federalist | February 16 – March 3, 1797 | 4th Congress |
| William Bradford | Rhode Island | Federalist | July 6 – October 1797 | 5th Congress |
| Jacob Read | South Carolina | Federalist | November 22 – December 12, 1797 | 5th Congress |
| Theodore Sedgwick | Massachusetts | Federalist | June 27 – December 5, 1798 | 5th Congress |
| John Laurance | New York | Federalist | December 6–27, 1798 | 5th Congress |
| James Ross | Pennsylvania | Federalist | March 1 – December 1, 1799 | 5th Congress |
| Samuel Livermore | New Hampshire | Federalist | December 2–29, 1799 | 6th Congress |
| Uriah Tracy | Connecticut | Federalist | May 14 – November 16, 1800 | 6th Congress |
| John E. Howard | Maryland | Federalist | November 21–27, 1800 | 6th Congress |
| James Hillhouse | Connecticut | Federalist | February 28 – March 3, 1801 | 6th Congress |
| Abraham Baldwin | Georgia | Democratic-Republican | December 7, 1801 – January 14, 1802 | 7th Congress |
| Abraham Baldwin | Georgia | Democratic-Republican | April 17 – December 13, 1802 | 7th Congress |
| Stephen R. Bradley | Vermont | Democratic-Republican | December 14, 1802 – January 18, 1803 | 7th Congress |
| Stephen R. Bradley | Vermont | Democratic-Republican | February 25, 1803 | 7th Congress |
| Stephen R. Bradley | Vermont | Democratic-Republican | March 2 – October 16, 1803 | 7th Congress |
| John Brown | Kentucky | Democratic-Republican | October 17 – December 6, 1803 | 8th Congress |
| John Brown | Kentucky | Democratic-Republican | January 23 – February 26, 1804 | 8th Congress |
| Jesse Franklin | North Carolina | Democratic-Republican | March 10 – November 4, 1804 | 8th Congress |
| Joseph Anderson | Tennessee | Democratic-Republican | January 15 – February 3, 1805 | 8th Congress |
| Joseph Anderson | Tennessee | Democratic-Republican | February 28 – March 2, 1805 | 8th Congress |
| Joseph Anderson | Tennessee | Democratic-Republican | March 2 – December 1, 1805 | 8th Congress |
| Samuel Smith | Maryland | Democratic-Republican | December 2–15, 1805 | 9th Congress |
| Samuel Smith | Maryland | Democratic-Republican | March 18 – November 30, 1806 | 9th Congress |
| Samuel Smith | Maryland | Democratic-Republican | March 2 – October 25, 1807 | 9th Congress |
| Samuel Smith | Maryland | Democratic-Republican | April 16 – November 6, 1808 | 10th Congress |
| Stephen R. Bradley | Vermont | Democratic-Republican | December 28, 1808 – January 8, 1809 | 10th Congress |
| John Milledge | Georgia | Democratic-Republican | January 30 – March 3, 1809 | 10th Congress |
| John Milledge | Georgia | Democratic-Republican | March 4 – May 21, 1809 | 11th Congress |
| Andrew Gregg | Pennsylvania | Democratic-Republican | June 26 – December 18, 1809 | 11th Congress |
| John Gaillard | South Carolina | Democratic-Republican | February 28 – March 2, 1810 | 11th Congress |
| John Gaillard | South Carolina | Democratic-Republican | April 17 – December 11, 1810 | 11th Congress |
| John Pope | Kentucky | Democratic-Republican | February 23 – November 3, 1811 | 11th Congress |
| William H. Crawford | Georgia | Democratic-Republican | March 24, 1812 – March 3, 1813 | 12th Congress |
| William H. Crawford | Georgia | Democratic-Republican | March 4–23, 1813 | 13th Congress |
| Joseph B. Varnum | Massachusetts | Democratic-Republican | December 6, 1813 – February 3, 1814 | 13th Congress |
| John Gaillard | South Carolina | Democratic-Republican | April 18 – November 25, 1814 | 13th Congress |
| John Gaillard | South Carolina | Democratic-Republican | November 25, 1814 – December 3, 1815 | 13th Congress |
| John Gaillard | South Carolina | Democratic-Republican | December 4, 1815 – March 3, 1817 | 14th Congress |
| John Gaillard | South Carolina | Democratic-Republican | March 4, 1817 | 15th Congress |
| John Gaillard | South Carolina | Democratic-Republican | March 6, 1817 – February 18, 1818 | 15th Congress |
| John Gaillard | South Carolina | Democratic-Republican | March 31, 1818 – January 5, 1819 | 15th Congress |
| James Barbour | Virginia | Democratic-Republican | February 15 – December 5, 1819 | 15th Congress |
| James Barbour | Virginia | Democratic-Republican | December 6–26, 1819 | 16th Congress |
| John Gaillard | South Carolina | Democratic-Republican | January 25, 1820 – December 2, 1821 | 16th Congress |
| John Gaillard | South Carolina | Democratic-Republican | December 3–27, 1821 | 17th Congress |
| John Gaillard | South Carolina | Democratic-Republican | February 1 – December 2, 1822 | 17th Congress |
| John Gaillard | South Carolina | Democratic-Republican | February 19 – November 30, 1823 | 17th Congress |
| John Gaillard | South Carolina | Democratic-Republican | December 1, 1823 – January 20, 1824 | 18th Congress |
| John Gaillard | South Carolina | Democratic-Republican | May 21, 1824 – March 3, 1825 | 18th Congress |
| John Gaillard | South Carolina | Democratic-Republican | March 9 – December 4, 1825 | 19th Congress |
| Nathaniel Macon | North Carolina | Democratic-Republican | May 20 – December 3, 1826 | 19th Congress |
| Nathaniel Macon | North Carolina | Democratic-Republican | January 2 – February 13, 1827 | 19th Congress |
| Nathaniel Macon | North Carolina | Democratic-Republican | March 2 – December 2, 1827 | 19th Congress |
| Samuel Smith | Maryland | Jacksonian | May 15 – December 18, 1828 | 20th Congress |
| Samuel Smith | Maryland | Jacksonian | March 13 – December 10, 1829 | 21st Congress |
| Samuel Smith | Maryland | Jacksonian | May 20 – December 31, 1830 | 21st Congress |
| Samuel Smith | Maryland | Jacksonian | March 1 – December 4, 1831 | 21st Congress |
| Samuel Smith | Maryland | Jacksonian | December 5–11, 1831 | 22nd Congress |
| Littleton Tazewell | Virginia | Jacksonian | July 9–16, 1832 | 22nd Congress |
| Hugh Lawson White | Tennessee | Jacksonian | December 3, 1832 – December 1, 1833 | 22nd Congress |
| Hugh Lawson White | Tennessee | Jacksonian | December 2–15, 1833 | 23rd Congress |
| George Poindexter | Mississippi | National Republican | June 28 – November 30, 1834 | 23rd Congress |
| John Tyler | Virginia | National Republican | March 3 – December 6, 1835 | 24th Congress |
| William R. King | Alabama | Democratic | July 1 – December 4, 1836 | 24th Congress |
| William R. King | Alabama | Democratic | January 28 – March 3, 1837 | 24th Congress |
| William R. King | Alabama | Democratic | March 7 – September 3, 1837 | 25th Congress |
| William R. King | Alabama | Democratic | October 13 – December 3, 1837 | 25th Congress |
| William R. King | Alabama | Democratic | July 2 – December 18, 1838 | 25th Congress |
| William R. King | Alabama | Democratic | February 25 – December 1, 1839 | 25th Congress |
| William R. King | Alabama | Democratic | December 2–26, 1839 | 26th Congress |
| William R. King | Alabama | Democratic | July – December 15, 1840 | 26th Congress |
| William R. King | Alabama | Democratic | March 3, 1841 | 26th Congress |
| William R. King | Alabama | Democratic | March 4, 1841 | 27th Congress |
| Samuel Southard | New Jersey | Whig | March 11, 1841 – May 31, 1842 | 27th Congress |
| Willie P. Mangum | North Carolina | Whig | May 31, 1842 – December 3, 1843 | 27th Congress |
| Willie P. Mangum | North Carolina | Whig | December 4, 1843 – March 3, 1845 | 28th Congress |
| Willie P. Mangum | North Carolina | Whig | March 4, 1845 | 29th Congress |
| Ambrose H. Sevier | Arkansas | Democratic | December 27, 1845 | 29th Congress |
| David R. Atchison | Missouri | Democratic | August 8 – December 6, 1846 | 29th Congress |
| David R. Atchison | Missouri | Democratic | January 11–13, 1847 | 29th Congress |
| David R. Atchison | Missouri | Democratic | March 3 – December 5, 1847 | 29th Congress |
| David R. Atchison | Missouri | Democratic | February 2–8, 1848 | 30th Congress |
| David R. Atchison | Missouri | Democratic | June 1–14, 1848 | 30th Congress |
| David R. Atchison | Missouri | Democratic | June 26 – July 29, 1848 | 30th Congress |
| David R. Atchison | Missouri | Democratic | July 29 – December 4, 1848 | 30th Congress |
| David R. Atchison | Missouri | Democratic | December 26, 1848 – January 1, 1849 | 30th Congress |
| David R. Atchison | Missouri | Democratic | March 2–4, 1849 | 30th Congress |
| David R. Atchison | Missouri | Democratic | March 5, 1849 | 31st Congress |
| David R. Atchison | Missouri | Democratic | March 16 – December 2, 1849 | 31st Congress |
| William R. King | Alabama | Democratic | May 6–19, 1850 | 31st Congress |
| William R. King | Alabama | Democratic | July 11, 1850 – March 3, 1851 | 31st Congress |
| William R. King | Alabama | Democratic | March 4, 1851 – December 20, 1852 | 32nd Congress |
| David R. Atchison | Missouri | Democratic | December 20, 1852 – March 3, 1853 | 32nd Congress |
| David R. Atchison | Missouri | Democratic | March 4, 1853 – December 4, 1854 | 33rd Congress |
| Lewis Cass | Michigan | Democratic | December 4, 1854 | 33rd Congress |
| Jesse D. Bright | Indiana | Democratic | December 5, 1854 – December 2, 1855 | 33rd Congress |
| Jesse D. Bright | Indiana | Democratic | December 5, 1855 –June 9, 1856 | 34th Congress |
| Charles E. Stuart | Michigan | Democratic | June 9 – June 10, 1856 | 34th Congress |
| Jesse D. Bright | Indiana | Democratic | June 11, 1856 – January 6, 1857 | 34th Congress |
| James M. Mason | Virginia | Democratic | January 6 – March 3, 1857 | 34th Congress |
| James M. Mason | Virginia | Democratic | March 4, 1857 | 35th Congress |
| Thomas J. Rusk | Texas | Democratic | March 14 – July 29, 1857 | 35th Congress |
| Benjamin Fitzpatrick | Alabama | Democratic | December 7–20, 1857 | 35th Congress |
| Benjamin Fitzpatrick | Alabama | Democratic | March 29 – May 2, 1858 | 35th Congress |
| Benjamin Fitzpatrick | Alabama | Democratic | June 14 – December 5, 1858 | 35th Congress |
| Benjamin Fitzpatrick | Alabama | Democratic | January 19, 1859 | 35th Congress |
| Benjamin Fitzpatrick | Alabama | Democratic | January 25 – February 9, 1859 | 35th Congress |
| Benjamin Fitzpatrick | Alabama | Democratic | March 9 – December 4, 1859 | 36th Congress |
| Benjamin Fitzpatrick | Alabama | Democratic | December 19, 1859 – January 15, 1860 | 36th Congress |
| Benjamin Fitzpatrick | Alabama | Democratic | February 20–26, 1860 | 36th Congress |
| Jesse D. Bright | Indiana | Democratic | June 12 – June 26, 1860 | 36th Congress |
| Benjamin Fitzpatrick | Alabama | Democratic | June 26 – December 2, 1860 | 36th Congress |
| Solomon Foot | Vermont | Republican | February 16–17, 1861 | 36th Congress |
| Solomon Foot | Vermont | Republican | March 23 – July 3, 1861 | 37th Congress |
| Solomon Foot | Vermont | Republican | July 18 – December 1, 1861 | 37th Congress |
| Solomon Foot | Vermont | Republican | January 15, 1862 | 37th Congress |
| Solomon Foot | Vermont | Republican | March 31 – May 21, 1862 | 37th Congress |
| Solomon Foot | Vermont | Republican | June 19 – December 12, 1862 | 37th Congress |
| Solomon Foot | Vermont | Republican | February 18 – March 3, 1863 | 37th Congress |
| Solomon Foot | Vermont | Republican | March 4 – December 6, 1863 | 38th Congress |
| Solomon Foot | Vermont | Republican | December 18–20, 1863 | 38th Congress |
| Solomon Foot | Vermont | Republican | February 23, 1864 | 38th Congress |
| Solomon Foot | Vermont | Republican | March 11–13, 1864 | 38th Congress |
| Solomon Foot | Vermont | Republican | April 11–13, 1864 | 38th Congress |
| Daniel Clark | New Hampshire | Republican | April 26, 1864 – January 4, 1865 | 38th Congress |
| Daniel Clark | New Hampshire | Republican | February 9–19, 1865 | 38th Congress |
| Lafayette S. Foster | Connecticut | Republican | March 7, 1865 – March 2, 1867 | 39th Congress |
| Benjamin F. Wade | Ohio | Republican | March 2–3, 1867 | 39th Congress |
| Benjamin F. Wade | Ohio | Republican | March 4, 1867 – March 3, 1869 | 40th Congress |
| Henry B. Anthony | Rhode Island | Republican | March 23–28, 1869 | 41st Congress |
| Henry B. Anthony | Rhode Island | Republican | April 9 – December 5, 1869 | 41st Congress |
| Henry B. Anthony | Rhode Island | Republican | May 28 – June 2, 1870 | 41st Congress |
| Henry B. Anthony | Rhode Island | Republican | July 1–5, 1870 | 41st Congress |
| Henry B. Anthony | Rhode Island | Republican | July 14 – December 4, 1870 | 41st Congress |
| Henry B. Anthony | Rhode Island | Republican | March 10–12, 1871 | 42nd Congress |
| Henry B. Anthony | Rhode Island | Republican | April 17 – May 9, 1871 | 42nd Congress |
| Henry B. Anthony | Rhode Island | Republican | May 23 – December 3, 1871 | 42nd Congress |
| Henry B. Anthony | Rhode Island | Republican | December 21, 1871 – January 7, 1872 | 42nd Congress |
| Henry B. Anthony | Rhode Island | Republican | February 23–25, 1872 | 42nd Congress |
| Henry B. Anthony | Rhode Island | Republican | June 8 – December 1, 1872 | 42nd Congress |
| Henry B. Anthony | Rhode Island | Republican | December 4–8, 1872 | 42nd Congress |
| Henry B. Anthony | Rhode Island | Republican | December 13–15, 1872 | 42nd Congress |
| Henry B. Anthony | Rhode Island | Republican | December 20, 1872 – January 5, 1873 | 42nd Congress |
| Henry B. Anthony | Rhode Island | Republican | January 24, 1873 | 42nd Congress |
| Matthew H. Carpenter | Wisconsin | Republican | March 12–13, 1873 | 43rd Congress |
| Matthew H. Carpenter | Wisconsin | Republican | March 26 – November 30, 1873 | 43rd Congress |
| Matthew H. Carpenter | Wisconsin | Republican | December 11, 1873 – December 6, 1874 | 43rd Congress |
| Matthew H. Carpenter | Wisconsin | Republican | December 23, 1874 – January 4, 1875 | 43rd Congress |
| Henry B. Anthony | Rhode Island | Republican | January 25–31, 1875 | 43rd Congress |
| Henry B. Anthony | Rhode Island | Republican | February 15–17, 1875 | 43rd Congress |
| Thomas W. Ferry | Michigan | Republican | March 9–10, 1875 | 44th Congress |
| Thomas W. Ferry | Michigan | Republican | March 19 – December 20, 1875 | 44th Congress |
| Thomas W. Ferry | Michigan | Republican | December 20, 1875 – March 4, 1877 | 44th Congress |
| Thomas W. Ferry | Michigan | Republican | March 5, 1877 | 45th Congress |
| Thomas W. Ferry | Michigan | Republican | February 26 – March 3, 1878 | 45th Congress |
| Thomas W. Ferry | Michigan | Republican | April 17 – December 1, 1878 | 45th Congress |
| Thomas W. Ferry | Michigan | Republican | March 3–17, 1879 | 45th Congress |
| Allen G. Thurman | Ohio | Democratic | April 15 – November 30, 1879 | 46th Congress |
| Allen G. Thurman | Ohio | Democratic | April 7–14, 1880 | 46th Congress |
| Allen G. Thurman | Ohio | Democratic | May 6 – December 5, 1880 | 46th Congress |
| Thomas F. Bayard, Sr. | Delaware | Democratic | October 10–13, 1881 | 47th Congress |
| David Davis | Illinois | Independent | October 13, 1881 – March 3, 1883 | 47th Congress |
| George F. Edmunds | Vermont | Republican | March 3 – December 2, 1883 | 47th Congress |
| George F. Edmunds | Vermont | Republican | December 3, 1883 – January 14, 1884 | 48th Congress |
| George F. Edmunds | Vermont | Republican | January 14, 1884 – March 3, 1885 | 48th Congress |
| John Sherman | Ohio | Republican | December 7, 1885 – February 26, 1887 | 49th Congress |
| John James Ingalls | Kansas | Republican | February 26 – December 4, 1887 | 49th Congress |
| John James Ingalls | Kansas | Republican | December 5, 1887 – March 3, 1889 | 50th Congress |
| John James Ingalls | Kansas | Republican | March 7–17, 1889 | 51st Congress |
| John James Ingalls | Kansas | Republican | April 2 – December 1, 1889 | 51st Congress |
| John James Ingalls | Kansas | Republican | December 5–10, 1889 | 51st Congress |
| John James Ingalls | Kansas | Republican | February 28 – March 18, 1890 | 51st Congress |
| John James Ingalls | Kansas | Republican | April 3, 1890 – March 2, 1891 | 51st Congress |
| Charles F. Manderson | Nebraska | Republican | March 2 – December 6, 1891 | 51st Congress |
| Charles F. Manderson | Nebraska | Republican | December 7, 1891 – March 3, 1893 | 52nd Congress |
| Charles F. Manderson | Nebraska | Republican | March 4–22, 1893 | 53rd Congress |
| Isham G. Harris | Tennessee | Democratic | March 22, 1893 – January 7, 1895 | 53rd Congress |
| Matt W. Ransom | North Carolina | Democratic | January 7–10, 1895 | 53rd Congress |
| Isham G. Harris | Tennessee | Democratic | January 10 – March 3, 1895 | 53rd Congress |
| William P. Frye | Maine | Republican | February 7, 1896 – March 3, 1897 | 54th Congress |
| William P. Frye | Maine | Republican | March 4, 1897 – December 3, 1899 | 55th Congress |
| William P. Frye | Maine | Republican | December 4, 1899 – March 3, 1901 | 56th Congress |
| William P. Frye | Maine | Republican | March 7, 1901 – March 4, 1903 | 57th Congress |
| William P. Frye | Maine | Republican | March 5, 1903 – March 3, 1905 | 58th Congress |
| William P. Frye | Maine | Republican | March 4, 1905 – March 3, 1907 | 59th Congress |
| William P. Frye | Maine | Republican | December 5, 1907 – March 3, 1909 | 60th Congress |
| William P. Frye | Maine | Republican | March 4, 1909 – April 3, 1911 | 61st Congress |
| William P. Frye | Maine | Republican | April 4–27, 1911 | 62nd Congress |
| Augustus O. Bacon | Georgia | Democratic | August 14, 1911 | 62nd Congress |
| Charles Curtis | Kansas | Republican | December 4–12, 1911 | 62nd Congress |
| Augustus O. Bacon | Georgia | Democratic | January 15–17, 1912 | 62nd Congress |
| Jacob H. Gallinger | New Hampshire | Republican | February 12–14, 1912 | 62nd Congress |
| Augustus O. Bacon | Georgia | Democratic | March 11–12, 1912 | 62nd Congress |
| Frank B. Brandegee | Connecticut | Republican | March 25–26, 1912 | 62nd Congress |
| Augustus O. Bacon | Georgia | Democratic | April 8, 1912 | 62nd Congress |
| Jacob H. Gallinger | New Hampshire | Republican | April 26–27, 1912; May 7, 1912 | 62nd Congress |
| Augustus O. Bacon | Georgia | Democratic | May 10, 1912 | 62nd Congress |
| Henry Cabot Lodge | Massachusetts | Republican | May 25, 1912 | 62nd Congress |
| Augustus O. Bacon | Georgia | Democratic | May 30 – June 3, 1912; June 13 – July 5, 1912 | 62nd Congress |
| Jacob H. Gallinger | New Hampshire | Republican | July 6–31, 1912 | 62nd Congress |
| Augustus O. Bacon | Georgia | Democratic | August 1–10, 1912 | 62nd Congress |
| Jacob H. Gallinger | New Hampshire | Republican | August 12–26, 1912 | 62nd Congress |
| Augustus O. Bacon | Georgia | Democratic | August 27 – December 15, 1912 | 62nd Congress |
| Jacob H. Gallinger | New Hampshire | Republican | December 16, 1912, and January 4, 1913 | 62nd Congress |
| Augustus O. Bacon | Georgia | Democratic | January 5–18, 1913 | 62nd Congress |
| Jacob H. Gallinger | New Hampshire | Republican | January 19 – February 1, 1913 | 62nd Congress |
| Augustus O. Bacon | Georgia | Democratic | February 2–15, 1913 | 62nd Congress |
| Jacob H. Gallinger | New Hampshire | Republican | February 16 – March 3, 1913 | 62nd Congress |
| James Paul Clarke | Arkansas | Democratic | March 13, 1913 – March 3, 1915 | 63rd Congress |
| James Paul Clarke | Arkansas | Democratic | December 6, 1915 – October 1, 1916 | 64th Congress |
| Willard Saulsbury Jr. | Delaware | Democratic | December 14, 1916 – March 4, 1917 | 64th Congress |
| Willard Saulsbury Jr. | Delaware | Democratic | March 5, 1917 – March 3, 1919 | 65th Congress |
| Albert B. Cummins | Iowa | Republican | May 19, 1919 – March 3, 1921 | 66th Congress |
| Albert B. Cummins | Iowa | Republican | March 7, 1921 – December 2, 1923 | 67th Congress |
| Albert B. Cummins | Iowa | Republican | December 3, 1923 – March 3, 1925 | 68th Congress |
| Albert B. Cummins | Iowa | Republican | March 4–6, 1925 | 69th Congress |
| George H. Moses | New Hampshire | Republican | March 6, 1925 – March 4, 1927 | 69th Congress |
| George H. Moses | New Hampshire | Republican | December 15, 1927 – March 3, 1929 | 70th Congress |
| George H. Moses | New Hampshire | Republican | March 4, 1929 – December 6, 1931 | 71st Congress |
| George H. Moses | New Hampshire | Republican | December 7, 1931 – March 3, 1933 | 72nd Congress |
| Key Pittman | Nevada | Democratic | March 9, 1933 – January 2, 1935 | 73rd Congress |
| Key Pittman | Nevada | Democratic | January 7, 1935 – January 4, 1937 | 74th Congress |
| Key Pittman | Nevada | Democratic | January 5, 1937 – January 2, 1939 | 75th Congress |
| Key Pittman | Nevada | Democratic | January 3, 1939 – November 10, 1940 | 76th Congress |
| William H. King | Utah | Democratic | November 19, 1940 – January 3, 1941 | 76th Congress |
| Pat Harrison | Mississippi | Democratic | January 6 – June 22, 1941 | 77th Congress |
| Carter Glass | Virginia | Democratic | July 10, 1941 – January 5, 1943 | 77th Congress |
| Carter Glass | Virginia | Democratic | January 14, 1943 – January 2, 1945 | 78th Congress |
| Kenneth McKellar | Tennessee | Democratic | January 6, 1945 – January 2, 1947 | 79th Congress |
| Arthur H. Vandenberg | Michigan | Republican | January 4, 1947 – January 2, 1949 | 80th Congress |
| Kenneth McKellar | Tennessee | Democratic | January 3, 1949 – January 2, 1951 | 81st Congress |
| Kenneth McKellar | Tennessee | Democratic | January 3, 1951 – January 2, 1953 | 82nd Congress |
| Styles Bridges | New Hampshire | Republican | January 3, 1953 – January 4, 1955 | 83rd Congress |
| Walter F. George | Georgia | Democratic | January 5, 1955 – January 2, 1957 | 84th Congress |
| Carl Hayden | Arizona | Democratic | January 3, 1957 – January 6, 1959 | 85th Congress |
| Carl Hayden | Arizona | Democratic | January 7, 1959 – January 2, 1961 | 86th Congress |
| Carl Hayden | Arizona | Democratic | January 3, 1961 – January 8, 1963 | 87th Congress |
| Carl Hayden | Arizona | Democratic | January 9, 1963 – January 3, 1965 | 88th Congress |
| Carl Hayden | Arizona | Democratic | January 4, 1965 – January 9, 1967 | 89th Congress |
| Carl Hayden | Arizona | Democratic | January 10, 1967 – January 2, 1969 | 90th Congress |
| Richard Russell Jr. | Georgia | Democratic | January 3, 1969 – January 3, 1971 | 91st Congress |
| Richard Russell Jr. | Georgia | Democratic | January 3, 1971 – January 21, 1971 | 92nd Congress |
| Allen J. Ellender | Louisiana | Democratic | January 22, 1971 – July 27, 1972 | 92nd Congress |
| James Eastland | Mississippi | Democratic | July 28, 1972 – January 2, 1973 | 92nd Congress |
| James Eastland | Mississippi | Democratic | January 3, 1973 – January 13, 1975 | 93rd Congress |
| James Eastland | Mississippi | Democratic | January 14, 1975 – January 3, 1977 | 94th Congress |
| James Eastland | Mississippi | Democratic | January 4, 1977 – December 27, 1978 | 95th Congress |
| Warren Magnuson | Washington | Democratic | January 15, 1979 – December 4, 1980 | 96th Congress |
| Milton Young | North Dakota | Republican | December 5, 1980 | 96th Congress |
| Warren Magnuson | Washington | Democratic | December 6, 1980 – January 4, 1981 | 96th Congress |
| Strom Thurmond | South Carolina | Republican | January 5, 1981 – January 2, 1983 | 97th Congress |
| Strom Thurmond | South Carolina | Republican | January 3, 1983 – January 2, 1985 | 98th Congress |
| Strom Thurmond | South Carolina | Republican | January 3, 1985 – January 5, 1987 | 99th Congress |
| John C. Stennis | Mississippi | Democratic | January 6, 1987 – January 3, 1989 | 100th Congress |
| Robert Byrd | West Virginia | Democratic | January 3, 1989 – January 2, 1991 | 101st Congress |
| Robert Byrd | West Virginia | Democratic | January 3, 1991 – January 4, 1993 | 102nd Congress |
| Robert Byrd | West Virginia | Democratic | January 5, 1993 – January 3, 1995 | 103rd Congress |
| Strom Thurmond | South Carolina | Republican | January 4, 1995 – January 6, 1997 | 104th Congress |
| Strom Thurmond | South Carolina | Republican | January 7, 1997 – January 6, 1999 | 105th Congress |
| Strom Thurmond | South Carolina | Republican | January 7, 1999 – January 3, 2001 | 106th Congress |
| Robert Byrd | West Virginia | Democratic | January 3–20, 2001 | 107th Congress |
| Strom Thurmond | South Carolina | Republican | January 20 – June 6, 2001 | 107th Congress |
| Robert Byrd | West Virginia | Democratic | June 6, 2001 – January 3, 2003 | 107th Congress |
| Ted Stevens | Alaska | Republican | January 3, 2003 – January 3, 2005 | 108th Congress |
| Ted Stevens | Alaska | Republican | January 3, 2005 – January 4, 2007 | 109th Congress |
| Robert Byrd | West Virginia | Democratic | January 4, 2007 – January 3, 2009 | 110th Congress |
| Robert Byrd | West Virginia | Democratic | January 3, 2009 – June 28, 2010 | 111th Congress |
| Daniel Inouye | Hawaii | Democratic | June 28, 2010 – January 5, 2011 | 111th Congress |
| Daniel Inouye | Hawaii | Democratic | January 5, 2011 – December 17, 2012 | 112th Congress |
| Patrick Leahy | Vermont | Democratic | December 17, 2012 – January 3, 2013 | 112th Congress |
| Patrick Leahy | Vermont | Democratic | January 3, 2013 – January 3, 2015 | 113th Congress |
| Orrin Hatch | Utah | Republican | January 3, 2015 – January 3, 2017 | 114th Congress |
| Orrin Hatch | Utah | Republican | January 3, 2017 – January 3, 2019 | 115th Congress |
| Chuck Grassley | Iowa | Republican | January 3, 2019 – January 3, 2021 | 116th Congress |
| Chuck Grassley | Iowa | Republican | January 3, 2021 – January 20, 2021 | 117th Congress |
| Patrick Leahy | Vermont | Democratic | January 20, 2021 – January 3, 2023 | 117th Congress |
| Patty Murray | Washington | Democratic | January 3, 2023 – January 3, 2025 | 118th Congress |
| Chuck Grassley | Iowa | Republican | January 3, 2025 – present | 119th Congress |