List of United States senators in the 115th Congress

For a full description of seniority, an explanation of its rules, and the current list, see Seniority in the United States Senate.

This is a complete list of United States senators during the 115th United States Congress listed by seniority, from January 3, 2017, to January 3, 2019. It is a historical listing and will contain people who have not served the entire two-year Congress on account of resignations, deaths, or expulsions.

In this Congress, Bill Cassidy is the most junior senior senator. Jeff Sessions was the most senior junior senator at the start of this Congress, but resigned on February 8, 2017, to become United States Attorney General. Maria Cantwell has remained the most senior junior senator since.

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 his or her 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.^{[1][2][3][4][5]}

Terms of service

This article is about the terms of service of senators that expired in years. For a list of special elections to the United States Senate, see List of special elections to the United States Senate.

Class	Terms of service of senators that expired in years
Class 1	Terms of service of senators that expired in 2019 (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.)[6]
Class 2	Terms of service of senators that expired in 2021 (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.)[7]
Class 3	Terms of service of senators that expired in 2023 (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.)[8]

U.S. Senate seniority list

Rank	Historical rank	Senator	Party	State	Seniority date	Other factors
1	1692	Patrick Leahy	Democratic	Vermont	January 3, 1975
2	1708	Orrin Hatch	Republican	Utah	January 3, 1977
3	1719	Thad Cochran[9]	Republican	Mississippi	December 27, 1978	Former member of the U.S. House of Representatives
4	1743	Chuck Grassley	Republican	Iowa	January 3, 1981
5	1766	Mitch McConnell	Republican	Kentucky	January 3, 1985
6	1775	Richard Shelby	Republican	Alabama	January 3, 1987	Former member of the U.S. House of Representatives (8 years)
7	1777	John McCain[10]	Republican	Arizona		Former member of the U.S. House of Representatives (4 years)
8	1801	Dianne Feinstein	Democratic	California	November 10, 1992
9	1812	Patty Murray	Democratic	Washington	January 3, 1993
10	1816	Jim Inhofe	Republican	Oklahoma	November 17, 1994
11	1827	Ron Wyden	Democratic	Oregon	February 6, 1996
12	1830	Pat Roberts	Republican	Kansas	January 3, 1997	Former member of the U.S. House of Representatives (16 years)
13	1831	Dick Durbin	Democratic	Illinois		Former member of the U.S. House of Representatives (14 years)
14	1835	Jack Reed	Democratic	Rhode Island		Former member of the U.S. House of Representatives (6 years)
15	1839	Jeff Sessions[11]	Republican	Alabama		Alabama 22nd in population (1990)
16	1842	Susan Collins	Republican	Maine		Maine 38th in population (1990)
17	1843	Mike Enzi	Republican	Wyoming		Wyoming 50th in population (1990)
18	1844	Chuck Schumer	Democratic	New York	January 3, 1999	Former member of the U.S. House of Representatives (18 years)
19	1846	Mike Crapo	Republican	Idaho		Former member of the U.S. House of Representatives (6 years)
20	1854	Bill Nelson	Democratic	Florida	January 3, 2001	Former member of the U.S. House of Representatives (12 years)
21	1855	Tom Carper	Democratic	Delaware		Former member of the U.S. House of Representatives (10 years)
22	1856	Debbie Stabenow	Democratic	Michigan		Former member of the U.S. House of Representatives (4 years)
23	1859	Maria Cantwell	Democratic	Washington		Former member of the U.S. House of Representatives (2 years)
24	1873	John Cornyn	Republican	Texas	December 1, 2002
25	1867	Lisa Murkowski	Republican	Alaska	December 20, 2002
26	1869	Lindsey Graham	Republican	South Carolina	January 3, 2003	Former member of the U.S. House of Representatives
27	1871	Lamar Alexander	Republican	Tennessee
28	1876	Richard Burr	Republican	North Carolina	January 3, 2005	Former member of the U.S. House of Representatives (10 years)
29	1879	John Thune	Republican	South Dakota		Former member of the U.S. House of Representatives (6 years)
30	1880	Johnny Isakson	Republican	Georgia		Former member of the U.S. House of Representatives (5 years, 10 months)
31	1885	Bob Menendez	Democratic	New Jersey	January 18, 2006
32	1886	Ben Cardin	Democratic	Maryland	January 3, 2007	Former member of the U.S. House of Representatives (20 years)
33	1887	Bernie Sanders	Independent	Vermont		Former member of the U.S. House of Representatives (16 years)[12]
34	1888	Sherrod Brown	Democratic	Ohio		Former member of the U.S. House of Representatives (14 years)
35	1889	Bob Casey, Jr.	Democratic	Pennsylvania		Pennsylvania 6th in population (2000)
36	1891	Bob Corker	Republican	Tennessee		Tennessee 16th in population (2000)
37	1892	Claire McCaskill	Democratic	Missouri		Missouri 17th in population (2000)
38	1893	Amy Klobuchar	Democratic	Minnesota		Minnesota 21st in population (2000)
39	1894	Sheldon Whitehouse	Democratic	Rhode Island		Rhode Island 43rd in population (2000)
40	1895	Jon Tester	Democratic	Montana		Montana 44th in population (2000)
41	1896	John Barrasso	Republican	Wyoming	June 25, 2007
42	1897	Roger Wicker	Republican	Mississippi	December 31, 2007
43	1899	Tom Udall	Democratic	New Mexico	January 3, 2009	Former member of the U.S. House of Representatives
44	1901	Jeanne Shaheen	Democratic	New Hampshire		Former governor (6 years)
45	1902	Mark Warner	Democratic	Virginia		Former governor (4 years)
46	1903	Jim Risch	Republican	Idaho		Former governor (7 months)
47	1905	Jeff Merkley	Democratic	Oregon
48	1909	Michael Bennet	Democratic	Colorado	January 21, 2009
49	1910	Kirsten Gillibrand	Democratic	New York	January 26, 2009
50	1911	Al Franken[13]	Democratic	Minnesota	July 7, 2009
51	1916	Joe Manchin	Democratic	West Virginia	November 15, 2010	Former governor
52	1917	Chris Coons	Democratic	Delaware
53	1919	Roy Blunt	Republican	Missouri	January 3, 2011	Former member of the U.S. House of Representatives (14 years); Missouri 17th in population (2000)
54	1920	Jerry Moran	Republican	Kansas		Former member of the U.S. House of Representatives (14 years); Kansas 32nd in population (2000)
55	1921	Rob Portman	Republican	Ohio		Former member of the U.S. House of Representatives (12 years)
56	1922	John Boozman	Republican	Arkansas		Former member of the U.S. House of Representatives (9 years)
57	1923	Pat Toomey	Republican	Pennsylvania		Former member of the U.S. House of Representatives (6 years)
58	1924	John Hoeven	Republican	North Dakota		Former governor
59	1925	Marco Rubio	Republican	Florida		Florida 4th in population (2000)
60	1926	Ron Johnson	Republican	Wisconsin		Wisconsin 18th in population (2000)
61	1927	Rand Paul	Republican	Kentucky		Kentucky 25th in population (2000)
62	1928	Richard Blumenthal	Democratic	Connecticut		Connecticut 29th in population (2000)
63	1929	Mike Lee	Republican	Utah		Utah 34th in population (2000)
64	1931	Dean Heller	Republican	Nevada	May 9, 2011
65	1932	Brian Schatz	Democratic	Hawaii	December 27, 2012
66	1933	Tim Scott	Republican	South Carolina	January 2, 2013
67	1934	Tammy Baldwin	Democratic	Wisconsin	January 3, 2013	Former member of the U.S. House of Representatives (14 years)
68	1935	Jeff Flake	Republican	Arizona		Former member of the U.S. House of Representatives (12 years)
69	1936	Joe Donnelly	Democratic	Indiana		Former member of the U.S. House of Representatives (6 years); Indiana 16th in population (2010)
70	1937	Chris Murphy	Democratic	Connecticut		Former member of the U.S. House of Representatives (6 years); Connecticut 29th in population (2010)
71	1938	Mazie Hirono	Democratic	Hawaii		Former member of the U.S. House of Representatives (6 years); Hawaii 42nd in population (2010)
72	1939	Martin Heinrich	Democratic	New Mexico		Former member of the U.S. House of Representatives (4 years)
73	1940	Angus King	Independent	Maine		Former governor (8 years)
74	1941	Tim Kaine	Democratic	Virginia		Former governor (4 years)
75	1942	Ted Cruz	Republican	Texas		Texas 2nd in population (2010)
76	1943	Elizabeth Warren	Democratic	Massachusetts		Massachusetts 15th in population (2010)
77	1944	Deb Fischer	Republican	Nebraska		Nebraska 38th in population (2010)
78	1945	Heidi Heitkamp	Democratic	North Dakota		North Dakota 48th in population (2010)
79	1948	Ed Markey	Democratic	Massachusetts	July 16, 2013	Former member of the U.S. House of Representatives
80	1949	Cory Booker	Democratic	New Jersey	October 31, 2013
81	1951	Shelley Moore Capito	Republican	West Virginia	January 3, 2015	Former member of the U.S. House of Representatives (14 years)
82	1952	Gary Peters	Democratic	Michigan		Former member of the U.S. House of Representatives (6 years); Michigan 9th in population (2010)
83	1953	Bill Cassidy	Republican	Louisiana		Former member of the U.S. House of Representatives (6 years); Louisiana 25th in population (2010)
84	1954	Cory Gardner	Republican	Colorado		Former member of the U.S. House of Representatives (4 years); Colorado 22nd in population (2010)
85	1955	James Lankford	Republican	Oklahoma		Former member of the U.S. House of Representatives (4 years); Oklahoma 28th in population (2010)
86	1956	Tom Cotton	Republican	Arkansas		Former member of the U.S. House of Representatives (2 years); Arkansas 32nd in population (2010)
87	1957	Steve Daines	Republican	Montana		Former member of the U.S. House of Representatives (2 years); Montana 44th in population (2010)
88	1958	Mike Rounds	Republican	South Dakota		Former governor
89	1959	David Perdue	Republican	Georgia		Georgia 8th in population (2010)
90	1960	Thom Tillis	Republican	North Carolina		North Carolina 10th in population (2010)
91	1961	Joni Ernst	Republican	Iowa		Iowa 30th in population (2010)
92	1962	Ben Sasse	Republican	Nebraska		Nebraska 37th in population (2010)
93	1963	Dan Sullivan	Republican	Alaska		Alaska 47th in population (2010)
94	1964	Chris Van Hollen	Democratic	Maryland	January 3, 2017	Former member of the U.S. House of Representatives (14 years)
95	1965	Todd Young	Republican	Indiana		Former member of the U.S. House of Representatives (6 years)
96	1966	Tammy Duckworth	Democratic	Illinois		Former member of the U.S. House of Representatives (4 years)
97	1967	Maggie Hassan	Democratic	New Hampshire		Former governor
98	1968	Kamala Harris	Democratic	California		California 1st in population (2010)
99	1969	John Neely Kennedy	Republican	Louisiana		Louisiana 25th in population (2010)
100	1970	Catherine Cortez Masto	Democratic	Nevada		Nevada 35th in population (2010)
101	1971	Luther Strange[11]	Republican	Alabama	February 9, 2017
102	1972	Tina Smith[13]	Democratic	Minnesota	January 3, 2018	Minnesota 21st in population (2010)
103	1973	Doug Jones[11]	Democratic	Alabama		Alabama 23rd in population (2010)
104	1974	Cindy Hyde-Smith[9]	Republican	Mississippi	April 2, 2018
105	1820[14]	Jon Kyl[10][15]	Republican	Arizona	September 4, 2018

See also

• 115th United States Congress
• List of members of the United States House of Representatives in the 115th Congress by seniority

Notes

1. A Chronological List of United States Senators 1789-Present, via www.senate.gov
2. 1971 U.S Census Report Contains 1970 Census results.
3. 1981 U.S Census Report Contains 1980 Census results.
4. 1991 U.S Census Report Contains 1990 Census results.
5. "2000 Census State Population Rankings". Archived from the original on 2020-02-12. Retrieved 2016-10-31.
6. Terms of service of senators that expired in 2019.
7. Terms of service of senators that expired in 2021.
8. Terms of service of senators that expired in 2023.
9. In Mississippi, Thad Cochran (R) resigned April 1, 2018. He was replaced April 2, 2018 by Cindy Hyde-Smith (R).
10. In Arizona, John McCain (R) died August 25, 2018. He was replaced September 4, 2018 by Jon Kyl (R).
11. In Alabama, Jeff Sessions (R) resigned February 8, 2017. He was replaced February 9, 2017 by Luther Strange (R). Strange lost the election to finish Sessions's term and was replaced January 3, 2018 by Doug Jones (D).
12. Although Sanders was a candidate for the 2016 Democratic presidential nomination, and votes with the Democrats for organizational purposes, he has been elected and classified as an Independent throughout his time in Congress.
13. In Minnesota, Al Franken (D) resigned January 2, 2018. He was replaced January 3, 2018 by Tina Smith (D).
14. Kyl previously served as a U.S. senator.
15. In Arizona, Jon Kyl (R) resigned December 31, 2018.

External links

• "SENATORS OF THE UNITED STATES / 1789-present / A chronological list of senators since the First Congress in 1789" (PDF). senate.gov. United States Senate.