This is a complete list of United States senators during the 118th United States Congress listed by seniority from January 3, 2023, to January 3, 2025. It is a historical listing and will contain people who have not served the entire two-year Congress should anyone resign, die, or be expelled.

Order of service is based on the commencement of the senator's first term. Behind this is former service as a senator (only giving the senator seniority within their new incoming class), service as vice president, a House member, a cabinet secretary, or a governor of a state. The final factor is the population of the senator's state.A Chronological List of United States Senators 1789–Present, via www.senate.gov1971 U.S Census Report Contains 1970 census results.1981 U.S Census Report Contains 1980 census results.1991 U.S Census Report Contains 1990 census results. If two senators are tied on all factors, as in the case of Jon Ossoff and Raphael Warnock, the senator elected to the full term is the senior senator.

In this Congress, the most junior senior senator is Jon Ossoff, and Maria Cantwell is the most senior junior senator.

Terms of service

ClassTerms of service of senators that will expire in yearsClass 1Terms of service of senators that expired in 2025 (Arizona, California, Connecticut, Delaware, Florida, Hawaii, Indiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Jersey, New Mexico, New York, North Dakota, Ohio, Pennsylvania, Rhode Island, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, and Wyoming.)Terms of service of senators that will expire in 2025.Class 2Terms of service of senators that will expire in 2027 (Alabama, Alaska, Arkansas, Colorado, Delaware, Georgia, Iowa, Idaho, Illinois, Kansas, Kentucky, Louisiana, Massachusetts, Maine, Michigan, Minnesota, Mississippi, Montana, North Carolina, Nebraska, New Hampshire, New Jersey, New Mexico, Oklahoma, Oregon, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Virginia, West Virginia, and Wyoming.)Terms of service of senators that will expire in 2027.Class 3Terms of service of senators that will expire in 2029 (Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, Florida, Georgia, Hawaii, Idaho, Illinois, Iowa, Indiana, Kansas, Kentucky, Louisiana, Massachusetts, Maine, Michigan, Minnesota, Mississippi, North Carolina, North Dakota, New Hampshire, New Mexico, Nevada, New York, Oklahoma, Oregon, South Carolina, South Dakota, Tennessee, Utah, Washington and Wisconsin.)Terms of service of senators that will expire in 2029

U.S. Senate seniority list Rank Historicalrank Senator Party State Seniority date Other factors 1 1743 Republican Iowa January 3, 1981   2 1766 Republican Kentucky January 3, 1985 3 1801 Democratic California November 4, 1992 4 1812 Democratic Washington January 3, 1993 5 1827 Democratic Oregon February 5, 1996 6 1831 Democratic Illinois January 3, 1997 Former member of the U.S. House of Representatives (14 years) 7 1835 Democratic Rhode Island Former member of the U.S. House of Representatives (6 years) 8 1842 Republican Maine   9 1844 Democratic New York January 3, 1999 Former member of the U.S. House of Representatives (18 years) 10 1846 Republican Idaho Former member of the U.S. House of Representatives (6 years) 11 1855 Democratic Delaware January 3, 2001 Former member of the U.S. House of Representatives (10 years) 12 1856 Democratic Michigan Former member of the U.S. House of Representatives (4 years) 13 1859 Democratic Washington Former member of the U.S. House of Representatives (2 years) 14 1867 Republican Texas December 1, 2002   15 1868 Republican Alaska December 20, 2002 16 1870 Republican South Carolina January 3, 2003 17 1879 Republican South Dakota January 3, 2005 18 1885 Democratic New Jersey January 18, 2006 19 1886 Democratic Maryland January 3, 2007 Former member of the U.S. House of Representatives (20 years) 20 1887 Independent Vermont Former member of the U.S. House of Representatives (16 years) 21 1888 Democratic Ohio Former member of the U.S. House of Representatives (14 years) 22 1889 Democratic Pennsylvania Pennsylvania 6th in population (2000) 23 1893 Democratic Minnesota Minnesota 21st in population (2000) 24 1894 Democratic Rhode Island Rhode Island 43rd in population (2000) 25 1895 Democratic Montana Montana 44th in population (2000) 26 1896 Republican Wyoming June 25, 2007   27 1897 Republican Mississippi December 31, 2007 28 1901 Democratic New Hampshire January 3, 2009 Former governor (6 years) 29 1902 Democratic Virginia Former governor (4 years) 30 1903 Republican Idaho Former governor (7 months) 31 1905 Democratic Oregon   32 1909 Democratic Colorado January 21, 2009 33 1910 Democratic New York January 26, 2009 34 1916 Democratic,Independent West Virginia November 15, 2010 Former governor 35 1917 Democratic Delaware   36 1920 Republican Kansas January 3, 2011 Former member of the U.S. House of Representatives (14 years) 37 1922 Republican Arkansas Former member of the U.S. House of Representatives (9 years) 38 1924 Republican North Dakota Former governor 39 1925 Republican Florida Florida 4th in population (2000) 40 1926 Republican Wisconsin Wisconsin 18th in population (2000) 41 1927 Republican Kentucky Kentucky 25th in population (2000) 42 1928 Democratic Connecticut Connecticut 29th in population (2000) 43 1929 Republican Utah Utah 34th in population (2000) 44 1932 Democratic Hawaii December 27, 2012   45 1933 Republican South Carolina January 2, 2013 46 1934 Democratic Wisconsin January 3, 2013 Former member of the U.S. House of Representatives (14 years) 47 1937 Democratic Connecticut Former member of the U.S. House of Representatives (6 years); Connecticut 29th in population (2010) 48 1938 Democratic Hawaii Former member of the U.S. House of Representatives (6 years); Hawaii 42nd in population (2010) 49 1939 Democratic New Mexico Former member of the U.S. House of Representatives (4 years) 50 1940 Independent Maine Former governor (8 years) 51 1941 Democratic Virginia Former governor (4 years) 52 1942 Republican Texas Texas 2nd in population (2010) 53 1943 Democratic Massachusetts Massachusetts 15th in population (2010) 54 1944 Republican Nebraska Nebraska 38th in population (2010) 55 1948 Democratic Massachusetts July 16, 2013 Former member of the U.S. House of Representatives (36 years) 56 1949 Democratic New Jersey October 31, 2013 57 1951 Republican West Virginia January 3, 2015 Former member of the U.S. House of Representatives (14 years) 58 1952 Democratic Michigan Former member of the U.S. House of Representatives (6 years); Michigan 9th in population (2010) 59 1953 Republican Louisiana Former member of the U.S. House of Representatives (6 years); Louisiana 25th in population (2010) 60 1955 Republican Oklahoma Former member of the U.S. House of Representatives (4 years) 61 1956 Republican Arkansas Former member of the U.S. House of Representatives (2 years); Arkansas 32nd in population (2010) 62 1957 Republican Montana Former member of the U.S. House of Representatives (2 years); Montana 44th in population (2010) 63 1958 Republican South Dakota Former governor 64 1960 Republican North Carolina North Carolina 10th in population (2010) 65 1961 Republican Iowa Iowa 30th in population (2010) 66 1962 Republican Nebraska Nebraska 38th in population (2010) 67 1963 Republican Alaska Alaska 47th in population (2010) 68 1964 Democratic Maryland January 3, 2017 Former member of the U.S. House of Representatives (14 years) 69 1965 Republican Indiana Former member of the U.S. House of Representatives (6 years) 70 1966 Democratic Illinois Former member of the U.S. House of Representatives (4 years) 71 1967 Democratic New Hampshire Former governor 72 1969 Republican Louisiana Louisiana 25th in population (2010) 73 1970 Democratic Nevada Nevada 35th in population (2010) 74 1972 Democratic Minnesota January 3, 2018   75 1974 Republican Mississippi April 2, 2018 76 1975 Republican Tennessee January 3, 2019 Former member of the U.S. House of Representatives (16 years) 77 1976 Independent Arizona Former member of the U.S. House of Representatives (6 years); Arizona 16th in population (2010) 78 1977 Republican North Dakota Former member of the U.S. House of Representatives (6 years); North Dakota 48th in population (2010) 79 1979 Democratic Nevada Former member of the U.S. House of Representatives (2 years) 80 1980 Republican Utah Former governor 81 1981 Republican Indiana Indiana 15th in population (2010) 82 1982 Republican Missouri Missouri 18th in population (2010) 83 1983 Republican Florida January 8, 2019   84 1985 Democratic Arizona December 2, 2020 85 1986 Democratic New Mexico January 3, 2021 Former member of the U.S. House of Representatives (12 years) 86 1987 Republican Wyoming Former member of the U.S. House of Representatives (8 years) 87 1988 Republican Kansas Former member of the U.S. House of Representatives (4 years) 88 1989 Democratic Colorado Former governor 89 1990 Republican Tennessee Tennessee 17th in population (2010) 90 1991 Republican Alabama Alabama 23rd in population (2010) 91 1992 Democratic California January 18, 2021 92 1993 DemocraticGeorgia January 20, 2021 "O" 15th in alphabet 93 1994 Democratic "W" 23rd in alphabet 94 1995 Democratic Vermont January 3, 2023 Former member of the U.S. House of Representatives (16 years) 95 1996 Republican Oklahoma Former member of the U.S. House of Representatives (10 years) 96 1997 Republican North Carolina Former member of the U.S. House of Representatives (6 years) 97 1998 Democratic Pennsylvania Pennsylvania 5th in population (2020) 98 1999 Republican Ohio Ohio 7th in population (2020) 99 2000 Republican Missouri Missouri 19th in population (2020) 100 2001 Republican Alabama Alabama 24th in population (2020) 2002 Republican Nebraska January 23, 2023   2003 Democratic California October 1, 2023 2004 Democratic New Jersey August 20, 2024 2005 Democratic California December 8, 2024 Former member of the U.S. House of Representatives (24 years) 2006 Democratic New Jersey Former member of the U.S. House of Representatives (6 years)

The most senior senators by class were Dianne Feinstein (D-California) from Class 1, Mitch McConnell (R-Kentucky) from Class 2, and Chuck Grassley (R-Iowa) from Class 3. When Feinstein died on September 29, 2023 Tom Carper (D-Delaware) became the most senior senator from his class.

See also 118th United States Congress List of United States representatives in the 118th Congress Seniority in the United States Senate

Notes

References

External links