U.S. Senate Seniority List (119th Congress)

A ranking of all 100 current senators based on the length of their continuous service in the U.S. Senate. Seniority influences committee assignments and leadership roles.

Dean of the Senate (Longest Serving)

Chuck Grassley

Serving since January 3, 1981

Full Seniority Ranking

Rank	Senator	State	Service Started	Length of Service
1	Chuck Grassley	Iowa	January 3, 1981	45 years, 1 month
2	Mitch McConnell	Kentucky	January 3, 1985	41 years, 1 month
3	Patty Murray	Washington	January 3, 1993	33 years, 1 month
4	Ron Wyden	Oregon	February 6, 1996	30 years, 0 months
5	Susan Collins	Maine	January 3, 1997	29 years, 1 month
6	Dick Durbin	Illinois	January 3, 1997	29 years, 1 month
7	Jack Reed	Rhode Island	January 3, 1997	29 years, 1 month
8	Mike Crapo	Idaho	January 3, 1999	27 years, 1 month
9	Chuck Schumer	New York	January 3, 1999	27 years, 1 month
10	Maria Cantwell	Washington	January 3, 2001	25 years, 1 month
11	John Cornyn	Texas	December 2, 2002	23 years, 2 months
12	Lisa Murkowski	Alaska	December 20, 2002	23 years, 2 months
13	Lindsey Graham	South Carolina	January 3, 2003	23 years, 1 month
14	John Thune	South Dakota	January 3, 2005	21 years, 1 month
15	Amy Klobuchar	Minnesota	January 3, 2007	19 years, 1 month
16	Bernie Sanders	Vermont	January 3, 2007	19 years, 1 month
17	Sheldon Whitehouse	Rhode Island	January 3, 2007	19 years, 1 month
18	John Barrasso	Wyoming	June 22, 2007	18 years, 8 months
19	Roger Wicker	Mississippi	December 31, 2007	18 years, 2 months
20	Jeff Merkley	Oregon	January 3, 2009	17 years, 1 month
21	Jim Risch	Idaho	January 3, 2009	17 years, 1 month
22	Jeanne Shaheen	New Hampshire	January 3, 2009	17 years, 1 month
23	Mark Warner	Virginia	January 3, 2009	17 years, 1 month
24	Michael Bennet	Colorado	January 22, 2009	17 years, 1 month
25	Kirsten Gillibrand	New York	January 27, 2009	17 years, 1 month
26	Chris Coons	Delaware	November 15, 2010	15 years, 3 months
27	Richard Blumenthal	Connecticut	January 3, 2011	15 years, 1 month
28	John Boozman	Arkansas	January 3, 2011	15 years, 1 month
29	John Hoeven	North Dakota	January 3, 2011	15 years, 1 month
30	Ron Johnson	Wisconsin	January 3, 2011	15 years, 1 month
31	Mike Lee	Utah	January 3, 2011	15 years, 1 month
32	Jerry Moran	Kansas	January 3, 2011	15 years, 1 month
33	Rand Paul	Kentucky	January 3, 2011	15 years, 1 month
34	Brian Schatz	Hawaii	December 26, 2012	13 years, 2 months
35	Tim Scott	South Carolina	January 2, 2013	13 years, 1 month
36	Tammy Baldwin	Wisconsin	January 3, 2013	13 years, 1 month
37	Ted Cruz	Texas	January 3, 2013	13 years, 1 month
38	Deb Fischer	Nebraska	January 3, 2013	13 years, 1 month
39	Martin Heinrich	New Mexico	January 3, 2013	13 years, 1 month
40	Mazie Hirono	Hawaii	January 3, 2013	13 years, 1 month
41	Tim Kaine	Virginia	January 3, 2013	13 years, 1 month
42	Angus King	Maine	January 3, 2013	13 years, 1 month
43	Chris Murphy	Connecticut	January 3, 2013	13 years, 1 month
44	Elizabeth Warren	Massachusetts	January 3, 2013	13 years, 1 month
45	Ed Markey	Massachusetts	July 16, 2013	12 years, 7 months
46	Cory Booker	New Jersey	October 31, 2013	12 years, 4 months
47	Shelley Capito	West Virginia	January 3, 2015	11 years, 1 month
48	Bill Cassidy	Louisiana	January 3, 2015	11 years, 1 month
49	Tom Cotton	Arkansas	January 3, 2015	11 years, 1 month
50	Steve Daines	Montana	January 3, 2015	11 years, 1 month
51	Joni Ernst	Iowa	January 3, 2015	11 years, 1 month
52	James Lankford	Oklahoma	January 3, 2015	11 years, 1 month
53	Gary Peters	Michigan	January 3, 2015	11 years, 1 month
54	Mike Rounds	South Dakota	January 3, 2015	11 years, 1 month
55	Dan Sullivan	Alaska	January 3, 2015	11 years, 1 month
56	Thom Tillis	North Carolina	January 3, 2015	11 years, 1 month
57	Catherine Cortez Masto	Nevada	January 3, 2017	9 years, 1 month
58	Tammy Duckworth	Illinois	January 3, 2017	9 years, 1 month
59	Maggie Hassan	New Hampshire	January 3, 2017	9 years, 1 month
60	John Kennedy	Louisiana	January 3, 2017	9 years, 1 month
61	Chris Van Hollen	Maryland	January 3, 2017	9 years, 1 month
62	Todd Young	Indiana	January 3, 2017	9 years, 1 month
63	Tina Smith	Minnesota	January 3, 2018	8 years, 1 month
64	Cindy Hyde-Smith	Mississippi	April 9, 2018	7 years, 10 months
65	Marsha Blackburn	Tennessee	January 3, 2019	7 years, 1 month
66	Kevin Cramer	North Dakota	January 3, 2019	7 years, 1 month
67	Josh Hawley	Missouri	January 3, 2019	7 years, 1 month
68	Jacky Rosen	Nevada	January 3, 2019	7 years, 1 month
69	Rick Scott	Florida	January 3, 2019	7 years, 1 month
70	Mark Kelly	Arizona	December 2, 2020	5 years, 2 months
71	Bill Hagerty	Tennessee	January 3, 2021	5 years, 1 month
72	John Hickenlooper	Colorado	January 3, 2021	5 years, 1 month
73	Ben Luján	New Mexico	January 3, 2021	5 years, 1 month
74	Cynthia Lummis	Wyoming	January 3, 2021	5 years, 1 month
75	Roger Marshall	Kansas	January 3, 2021	5 years, 1 month
76	Tommy Tuberville	Alabama	January 3, 2021	5 years, 1 month
77	Jon Ossoff	Georgia	January 20, 2021	5 years, 1 month
78	Alex Padilla	California	January 20, 2021	5 years, 1 month
79	Raphael Warnock	Georgia	January 20, 2021	5 years, 1 month
80	Katie Britt	Alabama	January 3, 2023	3 years, 1 month
81	Ted Budd	North Carolina	January 3, 2023	3 years, 1 month
82	John Fetterman	Pennsylvania	January 3, 2023	3 years, 1 month
83	Markwayne Mullin	Oklahoma	January 3, 2023	3 years, 1 month
84	Eric Schmitt	Missouri	January 3, 2023	3 years, 1 month
85	Peter Welch	Vermont	January 3, 2023	3 years, 1 month
86	Pete Ricketts	Nebraska	January 12, 2023	3 years, 1 month
87	Andy Kim	New Jersey	December 8, 2024	1 year, 2 months
88	Angela Alsobrooks	Maryland	January 3, 2025	1 year, 1 month
89	Jim Banks	Indiana	January 3, 2025	1 year, 1 month
90	Lisa Blunt Rochester	Delaware	January 3, 2025	1 year, 1 month
91	John Curtis	Utah	January 3, 2025	1 year, 1 month
92	Ruben Gallego	Arizona	January 3, 2025	1 year, 1 month
93	David McCormick	Pennsylvania	January 3, 2025	1 year, 1 month
94	Bernie Moreno	Ohio	January 3, 2025	1 year, 1 month
95	Adam Schiff	California	January 3, 2025	1 year, 1 month
96	Tim Sheehy	Montana	January 3, 2025	1 year, 1 month
97	Elissa Slotkin	Michigan	January 3, 2025	1 year, 1 month
98	Jim Justice	West Virginia	January 14, 2025	1 year, 1 month
99	Jon Husted	Ohio	January 21, 2025	1 year, 1 month
100	Ashley Moody	Florida	January 21, 2025	1 year, 1 month