Senate Seniority

Senate Seniority List: 118th Congress

Source: https://www.senate.gov/artandhistory/history/resources/pdf/chronlist.pdf

Senate rank is first determined by the length of consecutive service in the Senate. For senators who entered the Senate on the same day, several tie-breaking procedures determine seniority. In order of precedence, these factors are: previous Senate service, service as the vice president, previous House service; service in the Cabinet, service as a state governor. If a tie still exists, senators are ranked according to the population of their state at the time of swearing in.

RankAll 100 SenatorsDate Service Began
1Charles E. Grassley, R-IAJan. 3, 1981
2Mitch McConnell, R-KYJan. 3, 1985
3Dianne Feinstein, D-CANov. 4, 1992
4Patty Murray, D-WAJan. 3, 1993
5Ron Wyden, D-ORFeb. 6, 1996
6Richard J. Durbin, D-ILJan. 3, 1997
7Jack Reed, D-RIJan. 3, 1997
8Susan Collins, R-MEJan. 3, 1997
9Charles E. Schumer, D-NYJan. 3, 1999
10Michael D. Crapo, R-IDJan. 3, 1999
11Thomas R. Carper, D-DEJan. 3, 2001
12Debbie Stabenow, D-MIJan. 3, 2001
13Maria Cantwell, D-WAJan. 3, 2001
14John Cornyn, R-TXDec. 2, 2002
15Lisa Murkowski, R-AKDec. 20, 2002
16Lindsey Graham, R-SCJan. 3, 2003
17John Thune, R-SDJan. 3, 2005
18Robert Menendez, D-NJJan. 17, 2006
19Benjamin L. Cardin, D-MDJan. 3, 2007
20Bernie Sanders, I-VTJan. 3, 2007
21Sherrod Brown, D-OHJan. 3, 2007
22Bob Casey, D-PAJan. 3, 2007
23Amy Klobuchar, D-MNJan. 3, 2007
24Sheldon Whitehouse, D-RIJan. 3, 2007
25Jon Tester, D-MTJan. 3, 2007
26John A. Barrasso, R-WYJun. 22, 2007
27Roger Wicker, R-MSDec. 31, 2007
28Jeanne Shaheen, D-NHJan. 3, 2009
29Mark Warner, D-VAJan. 3, 2009
30Jim Risch, R-IDJan. 3, 2009
31Jeff Merkley, D-ORJan. 3, 2009
32Michael Bennet, D-COJan. 21, 2009
33Kirsten Gillibrand, D-NYJan. 26, 2009*
34Joe Manchin, D-WVNov. 15, 2010
35Chris Coons, D-DENov. 15, 2010
36Jerry Moran, R-KSJan. 3, 2011
37John Boozman, R-ARJan. 3, 2011
38John Hoeven, R-NDJan. 3, 2011
39Marco Rubio, R-FLJan. 3, 2011
40Ron Johnson, R-WIJan. 3, 2011
41Rand Paul, R-KYJan. 3, 2011
42Richard Blumenthal, D-CTJan. 3, 2011
43Mike Lee, R-UTJan. 3, 2011
44Brian Schatz, D-HIDec. 26, 2012
45Tim Scott, R-SCJan. 2, 2013**
46Tammy Baldwin, D-WIJan. 3, 2013
47Chris Murphy, D-CTJan. 3, 2013
48Mazie Hirono, D-HIJan. 3, 2013
49Martin Heinrich, D-NMJan. 3, 2013
50Angus King, I-MEJan. 3, 2013
51Tim Kaine, D-VAJan. 3, 2013
52Ted Cruz, R-TXJan. 3, 2013
53Elizabeth Warren, D-MAJan. 3, 2013
54Deb Fischer, R-NEJan. 3, 2013
55Edward Markey, D-MAJul. 16, 2013
56Cory Booker, D-NJOct. 31, 2013
57Shelley Moore Capito, R-WVJan. 3, 2015
58Gary Peters, D-MIJan. 3, 2015
59Bill Cassidy, R-LAJan. 3, 2015
60James Lankford, R-OKJan. 3, 2015
61Tom Cotton, R-ARJan. 3, 2015
62Steve Daines, R-MTJan. 3, 2015
63Mike Rounds, R-SDJan. 3, 2015
64Thom Tillis, R-NCJan. 3, 2015
65Joni Ernst, R-IAJan. 3, 2015
66Dan Sullivan, R-AKJan. 3, 2015
67Chris Van Hollen, D-MDJan. 3, 2017
68Todd Young, R-INJan. 3, 2017
69Tammy Duckworth, D-ILJan. 3, 2017
70Maggie Hassan, D-NHJan. 3, 2017
71John Kennedy, R-LAJan. 3, 2017
72Catherine Cortez Masto, D-NVJan. 3, 2017
73Tina Smith, D-MNJan. 3, 2018
74Cindy Hyde-Smith, R-MSApr. 2, 2018
75Marsha Blackburn, R-TNJan. 3, 2019
76Kyrsten Sinema, I-AZJan. 3, 2019
77Kevin Cramer, R-NDJan. 3, 2019
78Jacky Rosen, D-NVJan. 3, 2019
79Mitt Romney, R-UTJan. 3, 2019
80Mike Braun, R-INJan. 3, 2019
81Josh Hawley, R-MOJan. 3, 2019
82Rick Scott, R-FLJan. 8, 2019
83Mark Kelly, D-AZDec. 2, 2020
84Ben Ray Luján, (D-NM)Jan. 3, 2021
85Cynthia M. Lummis, (R-WY)Jan. 3, 2021
86Roger W. Marshall, (R-KS)Jan. 3, 2021
87John W. Hickenlooper, Jr., (D-CO)Jan. 3, 2021
88William F.Hagerty, IV, (R-TN)Jan. 3, 2021
89Thomas H. Tuberville, (R-AL)Jan. 3, 2021
90Alex Padilla, (D-CA)Jan. 20, 2021
91Jon Ossoff, (D-GA)Jan. 20, 2021
92Raphael G. Warnock, (D-GA)Jan. 20, 2021
93Peter Welch, (D-VT)Jan. 3, 2023
94Markwayne Mullin, (R-OK)Jan. 3, 2023
95Ted Budd, (R-NC)Jan. 3, 2023
96John Fetterman, (D-PA)Jan. 3, 2023
97JD Vance, (R-OH)Jan. 3, 2023
98Eric Schmitt, (R-MO)Jan. 3, 2023
99Katie Boyd Britt, (R-AL)Jan. 3, 2023
100Pete Ricketts (R-NE)Jan. 23, 2023

Kirsten Gillibrand was appointed on January 23, 2009. She resigned her House seat on January 26, and was sworn into office on January 27, 2009.

** Tim Scott was appointed on January 2, 2013, and resigned his House seat that same day. He was sworn into office on January 3, 2013.