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Senate Seniority

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Senate Seniority List: 115th Congress

Source: http://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.

Rank All 100 Senators Date Service Began
1 Patrick J. Leahy, D-VT Jan. 3, 1975
2 Orrin G. Hatch, R-UT Jan. 3, 1977
3 Charles E. Grassley, R-IA Jan. 3, 1981
4 Mitch McConnell, R-KY Jan. 3, 1985
5 Richard C. Shelby, R-AL Jan. 3, 1987
6 John McCain, R-AZ Jan. 3, 1987
7 Dianne Feinstein, D-CA Nov. 4, 1992
8 Patty Murray, D-WA Jan. 3, 1993
9 James M. Inhofe, R-OK Nov. 16, 1994
10 Ron Wyden, D-OR Feb. 6, 1996
11 Pat Roberts, R-KS Jan. 3, 1997
12 Richard J. Durbin, D-IL Jan. 3, 1997
13 Jack Reed, D-RI Jan. 3, 1997
14 Susan Collins, R-ME Jan. 3, 1997
15 Michael B. Enzi, R-WY Jan. 3, 1997
16 Charles E. Schumer, D-NY Jan. 3, 1999
17 Michael D. Crapo, R-ID Jan. 3, 1999
18 Bill Nelson, D-FL Jan. 3, 2001
19 Thomas R. Carper, D-DE Jan. 3, 2001
20 Debbie Stabenow, D-MI Jan. 3, 2001
21 Maria Cantwell, D-WA Jan. 3, 2001
22 Lisa Murkowski, R-AK Dec. 20, 2002
23 Lindsey Graham, R-SC Jan. 3, 2003
24 Lamar Alexander, R-TN Jan. 3, 2003
25 John Cornyn, R-TX Dec. 2, 2002*
26 Richard M. Burr, R-NC Jan. 3, 2005
27 John Thune, R-SD Jan. 3, 2005
28 Johnny Isakson, R-GA Jan. 3, 2005
29 Robert Menendez, D-NJ Jan. 17, 2006
30 Benjamin L. Cardin, D-MD Jan. 3, 2007
31 Bernie Sanders, I-VT Jan. 3, 2007
32 Sherrod Brown, D-OH Jan. 3, 2007
33 Bob Casey, D-PA Jan. 3, 2007
34 Bob Corker, R-TN Jan. 3, 2007
35 Claire McCaskill, D-MO Jan. 3, 2007
36 Amy Klobuchar, D-MN Jan. 3, 2007
37 Sheldon Whitehouse, D-RI Jan. 3, 2007
38 Jon Tester, D-MT Jan. 3, 2007
39 John A. Barrasso, R-WY Jun. 22, 2007
40 Roger Wicker, R-MS Dec. 31, 2007
41 Tom Udall, D-NM Jan. 3, 2009
42 Jeanne Shaheen, D-NH Jan. 3, 2009
43 Mark Warner, D-VA Jan. 3, 2009
44 Jim Risch, R-ID Jan. 3, 2009
45 Jeff Merkley, D-OR Jan. 3, 2009
46 Michael Bennet, D-CO Jan. 22, 2009
47 Kirsten Gillibrand, D-NY Jan. 26, 2009**
48 Joe Manchin, D-WV Nov. 15, 2010
49 Chris Coons, D-DE Nov. 15, 2010
50 Roy Blunt, R-MO Jan. 3, 2011
51 Jerry Moran, R-KS Jan. 3, 2011
52 Rob Portman, R-OH Jan. 3, 2011
53 John Boozman, R-AR Jan. 3, 2011
54 Pat Toomey, R-PA Jan. 3, 2011
55 John Hoeven, R-ND Jan. 3, 2011
56 Marco Rubio, R-FL Jan. 3, 2011
57 Ron Johnson, R-WI Jan. 3, 2011
58 Rand Paul, R-KY Jan. 3, 2011
59 Richard Blumenthal, D-CT Jan. 3, 2011
60 Mike Lee, R-UT Jan. 3, 2011
61 Dean Heller, R-NV May 9, 2011
62 Brian Schatz, D-HI Dec. 26, 2012
63 Tim Scott, R-SC Jan. 2, 2013***
64 Tammy Baldwin, D-WI Jan. 3, 2013
65 Jeff Flake, R-AZ Jan. 3, 2013
66 Joe Donnelly, D-IN Jan. 3, 2013
67 Chris Murphy, D-CT Jan. 3, 2013
68 Mazie Hirono, D-HI Jan. 3, 2013
69 Martin Heinrich, D-NM Jan. 3, 2013
70 Angus King, I-ME Jan. 3, 2013
71 Tim Kaine, D-VA Jan. 3, 2013
72 Ted Cruz, R-TX Jan. 3, 2013
73 Elizabeth Warren, D-MA Jan. 3, 2013
74 Deb Fischer, R-NE Jan. 3, 2013
75 Heidi Heitkamp, D-N.D. Jan. 3, 2013
76 Edward Markey, D-MA Jul. 16, 2013
77 Cory Booker, D-NJ Oct. 31, 2013
78 Shelley Moore Capito, R-WV Jan. 3, 2015
79 Gary Peters, D-MI Jan. 3, 2015
80 Bill Cassidy, R-LA Jan. 3, 2015
81 Cory Gardner, R-CO Jan. 3, 2015
82 James Lankford, R-OK Jan. 3, 2015
83 Tom Cotton, R-AR Jan. 3, 2015
84 Steve Daines, R-MT Jan. 3, 2015
85 Mike Rounds, R-SD Jan. 3, 2015
86 David Perdue, R-GA Jan. 3, 2015
87 Thom Tillis, R-NC Jan. 3, 2015
88 Joni Ernst, R-IA Jan. 3, 2015
89 Ben Sasse, R-NE Jan. 3, 2015
90 Dan Sullivan, R-AK Jan. 3, 2015
91 Chris Van Hollen, D-MD Jan. 3, 2017
92 Todd Young, R-IN Jan. 3, 2017
93 Tammy Duckworth, D-IL Jan. 3, 2017
94 Maggie Hassan, D-NH Jan. 3, 2017
95 Kamala Harris, D-CA Jan. 3, 2017
96 John Kennedy, R-LA Jan. 3, 2017
97 Catherine Cortez Masto, D-NV Jan. 3, 2017
98 Tina Smith, (D-MN) Jan. 3, 2018
99 Doug Jones, (D-AL) Jan. 3, 2018
100 Cindy Hyde-Smith, (R-MS) Apr. 9, 2018

* Phil Gramm resigned early, effective Nov. 30, 2002, so that John Cornyn could move into his office suite and begin organizing his staff. Cornyn did not, however, gain seniority, owing to a 1980 Rules Committee policy established by Senator Pell that no longer gave seniority to senators who entered Congress early for the purpose of gaining advantageous office space. 

** 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.