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The sergeant at arms and doorkeeper of the United States Senate (originally known as the doorkeeper of the Senate from April 7, 1789 – 1798) is the protocol officer, executive officer, and highest-ranking federal law enforcement officer of the Senate of the United States. The office of the sergeant at arms of the Senate currently has just short of 1,000 full time staff.
| No. | Image | Officer | State or territory | Tenure | Congress |
| 1 | James Mathers | New York | April 7, 1789 – September 2, 1811 | 1st – 12th | |
| 2 | Mountjoy Bayly | Maryland | November 6, 1811 – December 9, 1833 | 12th – 23rd | |
| 3 | John Shackford | New Hampshire | December 9, 1833 – August 16, 1837 | 23rd – 25th | |
| 4 | Stephen Haight | New York | September 4, 1837 – January 12, 1841 | 25th – 26th | |
| 5 | Edward Dyer | Maryland | March 8, 1841 – September 16, 1845 | 27th – 29th | |
| 6 | Robert Beale | Virginia | December 9, 1845 – March 17, 1853 | 29th – 33rd | |
| 7 | Dunning R. McNair | Pennsylvania | March 17, 1853 – July 6, 1861 | 33rd – 37th | |
| 8 | mw- } }George T. Brown | Illinois | July 6, 1861 – March 22, 1869 | 37th – 41st | |
| 9 | | John R. French | New Hampshire | March 22, 1869 – March 24, 1879 | 41st – 46th |
| 10 | Richard J. Bright | Indiana | March 24, 1879 – December 18, 1883 | 46th – 48th | |
| 11 | William P. Canaday | North Carolina | December 18, 1883 – June 30, 1890 | 48th – 51st | |
| 12 | | Edward K. Valentine | Nebraska | June 30, 1890 – August 7, 1893 | 51st – 53rd |
| 13 | Richard J. Bright | Indiana | August 8, 1893 – February 1, 1900 | 53rd – 56th | |
| 14 | | Daniel M. Ransdell | Indiana | February 1, 1900 – August 26, 1912 | 56th – 62nd |
| 15 | | E. Livingston Cornelius | Maryland | December 10, 1912 – March 4, 1913 | 62nd |
| 16 | Charles P. Higgins | Missouri | March 13, 1913 – March 3, 1919 | 63rd – 65th | |
| 17 | | David S. Barry | Rhode Island | May 19, 1919 – February 7, 1933 | 66th – 72nd |
| 18 | Chesley W. Jurney | Texas | March 9, 1933 – January 31, 1943 | 73rd – 78th | |
| 19 | | Wall Doxey | Mississippi | February 1, 1943 – January 3, 1947 | 78th – 79th |
| 20 | Edward F. McGinnis | Illinois | January 4, 1947 – January 2, 1949 | 80th | |
| 21 | Joseph C. Duke | Arizona | January 3, 1949 – January 2, 1953 | 81st – 82nd | |
| 22 | | Forest A. Harness | Indiana | January 3, 1953 – January 4, 1955 | 83rd – 84th |
| 23 | Joseph C. Duke | Arizona | January 5, 1955 – December 30, 1965 | 84th – 89th | |
| 24 | Robert G. Dunphy | Rhode Island | January 14, 1966 – June 30, 1972 | 89th – 92nd | |
| 25 | William H. Wannall | Maryland | July 1, 1972 – December 17, 1975 | 92nd – 94th | |
| 26 | | Frank "Nordy" Hoffman | Indiana | December 18, 1975 – January 4, 1981 | 94th – 97th |
| 27 | | Howard Liebengood | Virginia | January 5, 1981 – September 12, 1983 | 97th – 98th |
| 28 | Larry E. Smith | Virginia | September 13, 1983 – June 2, 1985 | 98th – 99th | |
| 29 | Ernest E. Garcia | Kansas | June 3, 1985 – January 5, 1987 | 99th – 100th | |
| 30 | Henry K. Giugni | Hawaii | January 6, 1987 – December 31, 1990 | 100th – 101st | |
| 31 | Martha S. Pope | Connecticut | January 3, 1991 – April 14, 1994 | 102nd – 103rd | |
| 32 | Robert Laurent Benoit | Maine | April 15, 1994 – January 3, 1995 | 103rd | |
| 33 | Howard O. Greene Jr. | Delaware | January 4, 1995 – September 6, 1996 | 104th | |
| 34 | Gregory S. Casey | Idaho | September 6, 1996 – November 9, 1998 | 104th – 105th | |
| 35 | | James W. Ziglar | Mississippi | November 9, 1998 – August 2, 2001 | 105th – 107th |
| 36 | | Alfonso E. Lenhardt | New York | September 4, 2001 – March 16, 2003 | 107th – 108th |
| 37 | | William H. Pickle | Colorado | March 17, 2003 – January 4, 2007 | 108th – 110th |
| 38 | | Terrance W. Gainer | Illinois | January 4, 2007 – May 2, 2014 | 110th – 113th |
| 39 | | Andrew B. Willison | Ohio | May 5, 2014 – January 6, 2015 | 113th – 114th |
| 40 | | Frank J. Larkin | Maryland | January 6, 2015 – April 16, 2018 | 114th – 115th |
| 41 | | Michael C. Stenger | New Jersey | April 16, 2018 – January 7, 2021 | 115th – 117th |
| – | | Jennifer Hemingway (acting) | Washington D.C. | January 7, 2021 - March 22, 2021 | 117th |
| 42 | | Karen Gibson | Montana | March 22, 2021 – January 3, 2025 | 117th – 118th |
| 43 | | Jennifer Hemingway | Washington D.C. | January 3, 2025 – present | 119th - Present |
| No. | Image | Officer | State or territory | Tenure | Congress |
| – | | James Morhard | 2015–2018 | 114th–115th | |
| – | | Jennifer Hemingway | 2018 – January 7, 2021 | 115th–117th | |
| – | | Eugene Goodman (acting) | January 20, 2021 - March 2, 2021 | 117th | |
| – | | Kelly Fado | March 22, 2021 – present | 117th – 118th - present |