SenatorDB

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

Chuck Grassley

Full Seniority Ranking

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