Wyoming is represented in the United States Congress by two senators, elected at large, who serve 6 year terms.
Seat A
|
| Name (Party) | Term in Office | Birth | Death | Notes |
| Joseph M. Carey (D) | 1890-1895 | DE, 1845 | Cheyenne, 1924 |
|
| Frances E. Warren (R) | 1895-1929 | MA, 1844 | DC, 1929 |
|
| Patrick Sullivan (R) | 1929-1930 | Ireland, 1865 | CA, 1935 | Appointed to fill unexpired term. |
| Robert D. Carey (R) | 1931-1937 | Cheyenne, 1878 | Cheyenne, 1937 |
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| Henry H. Schwartz (D) | 1937-1943 | OH, 1869 | Casper, 1955 |
|
| E.V. Robertson (R) | 1943-1949 | Wales, 1881 | 1963 |
|
| Lester C. Hunt (D) | 1949-1954 | IL, 1892 | DC, 1954 |
|
| Edward D. Crippa (R) | 1954-1955 | Rock Springs, 1899 | Rock Springs, 1960 | Appointed to fill unexpired term. |
| Joseph C. O'Mahoney (D) | 1955-1961 | MA, 1884 | DC, 1962 |
|
| Edwin Keith Thomson (R)
|
| Newcastle, 1919 | near Cody, 1960 | Elected in November 1960 but died one month later before being seated |
| J.J. Hickey (D) | 1961-1963 | Rawlins, 1911 | 1970 | Appointed to fill unexpired term |
| Milward Simpson (R) | 1963-1967 | Jackson, 1897 | Cody, 1993 |
|
| Clifford P. Hansen (R) | 1967-1979 | Teton Co., 1912 | Teton Co., 2009 |
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| Alan K. Simpson (R) | 1979-1997 | CO, 1931 |
|
|
| Mike Enzi (R) | 1997-2021 | WA, 1944 |
|
|
| Cynthia Lummis (R) | 2021- | Cheyenne, 1954 |
|
|
Seat B
|
| Name | Term in Office | Birth | Death | Notes |
| Francis E. Warren (R) | 1890-1892 | MA, 1844 | DC, 1929 |
|
| Clarence D. Clark | 1895-1917 | NY, 1851 | Evanston, 1930 | A vacancy occurred for two years from 1893-95. A. C. Beckwith was appointed to the seat but did not serve |
| John B. Kendrick (D) | 1917-1933 | TX, 1857 | Sheridan, 1933 | 1st senator popularly elected (not chosen by legislature) |
| Joseph C. O'Mahoney (D) | 1933-1953 | MA, 1884 | DC, 1962 |
|
| Frank A. Barrett (R) | 1953-1959 | NE, 1896 | Cheyenne 1962 |
|
| Gale McGee (D) | 1959-1977 | NE, 1915 | DC, 1992 |
|
| Malcolm Wallop (R) | 1977-1995 | NY, 1933 | Big Horn Co., 2011 |
|
| Craig Thomas (R) | 1995-2007 | Cody, 1933 | MD, 2007 | Reelected in November, 2006, died June 4, 2007. Barrasso was appointed and began service June 25, 2007, to fill out the first two years of Thomas’ term with an election to be held in 2008 for the remaining four years of the term |
| John A. Barrasso (R) | 2007- | PA, 1952 |
| Appointed to fill unexpired term |
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