Seniority in the United States Senate
Updated: 11/6/2025, 12:52:38 AM Wikipedia source
United States senators are conventionally ranked by the length of their tenure in the Senate. The senator in each U.S. state with the longer time in office is known as the senior senator; the other is the junior senator. This convention has no official standing, though seniority confers several benefits, including preference in the choice of committee assignments and physical offices. When senators have been in office for the same length of time, a number of tiebreakers, including previous offices held, are used to determine seniority. By tradition, the longest serving senator of the majority party is named president pro tempore of the Senate, the second-highest office in the Senate and the third in the line of succession to the presidency of the United States.
Tables
· Current seniority list
1
1
Currentrank
1
Historicalrank
1743
Senator
Chuck Grassley
Party
Republican
State
Iowa
Seniority date
January 3, 1981
Committee andleadership positions
President pro temporeChair: Judiciary
2
2
Currentrank
2
Historicalrank
1766
Senator
Mitch McConnell
Party
Kentucky
Party
January 3, 1985
State
Chair: Rules
3
3
Currentrank
3
Historicalrank
1812
Senator
Patty Murray
Party
Democratic
State
Washington
Seniority date
January 3, 1993
Other factors
President pro tempore emeritaVice Chair: Appropriations
4
4
Currentrank
4
Historicalrank
1827
Senator
Ron Wyden
Party
Oregon
Party
February 6, 1996
State
Ranking Member: Finance
5
5
Currentrank
5
Historicalrank
1831
Senator
Dick Durbin
Party
Illinois
Party
January 3, 1997
State
Former House member (14 years)
Seniority date
Senate Minority WhipRanking Member: Judiciary
6
6
Currentrank
6
Historicalrank
1835
Senator
Jack Reed
Party
Rhode Island
Party
Former House member (6 years)
State
Ranking Member: Armed Services
7
7
Currentrank
7
Historicalrank
1842
Senator
Susan Collins
Party
Republican
State
Maine
Other factors
Chair: Appropriations
8
8
Currentrank
8
Historicalrank
1844
Senator
Chuck Schumer
Party
Democratic
State
New York
Seniority date
January 3, 1999
Other factors
Former House member (18 years)
Committee andleadership positions
Senate Minority Leader
9
9
Currentrank
9
Historicalrank
1846
Senator
Mike Crapo
Party
Republican
State
Idaho
Seniority date
Former House member (6 years)
Other factors
Republican Chief Deputy WhipChair: Finance
10
10
Currentrank
10
Historicalrank
1859
Senator
Maria Cantwell
Party
Democratic
State
Washington
Seniority date
January 3, 2001
Committee andleadership positions
Ranking Member: Commerce
11
11
Currentrank
11
Historicalrank
1867
Senator
John Cornyn
Party
Republican
State
Texas
Seniority date
December 2, 2002
Other factors
Chair: Narcotics Caucus
12
12
Currentrank
12
Historicalrank
1868
Senator
Lisa Murkowski
Party
Alaska
Party
December 20, 2002
State
Chair: Indian Affairs
13
13
Currentrank
13
Historicalrank
1870
Senator
Lindsey Graham
Party
South Carolina
Party
January 3, 2003
State
Chair: Budget
14
14
Currentrank
14
Historicalrank
1879
Senator
John Thune
Party
South Dakota
Party
January 3, 2005
State
Senate Majority Leader
15
15
Currentrank
15
Historicalrank
1887
Senator
Bernie Sanders
Party
Independent
State
Vermont
Seniority date
January 3, 2007
Other factors
Former House member
Committee andleadership positions
Chair: Democratic Outreach CommitteeRanking Member: HELP
16
16
Currentrank
16
Historicalrank
1893
Senator
Amy Klobuchar
Party
Democratic
State
Minnesota
Seniority date
Minnesota 21st in population (2000)
Other factors
Chair: Democratic Steering and Policy CommitteeRanking Member: Agriculture
17
17
Currentrank
17
Historicalrank
1894
Senator
Sheldon Whitehouse
Party
Rhode Island
Party
Rhode Island 43rd in population (2000)
State
Ranking Member: EnvironmentRanking Member: Narcotics Caucus
18
18
Currentrank
18
Historicalrank
1896
Senator
John Barrasso
Party
Republican
State
Wyoming
Seniority date
June 22, 2007
Committee andleadership positions
Senate Majority Whip
19
19
Currentrank
19
Historicalrank
1897
Senator
Roger Wicker
Party
Mississippi
Party
December 31, 2007
State
Chair: Armed Services
20
20
Currentrank
20
Historicalrank
1901
Senator
Jeanne Shaheen
Party
Democratic
State
New Hampshire
Seniority date
January 3, 2009
Other factors
Former governor (6 years)
Committee andleadership positions
Ranking Member: Foreign Relations
21
21
Currentrank
21
Historicalrank
1902
Senator
Mark Warner
Party
Virginia
Party
Former governor (4 years)
State
Vice Chair: Democratic Caucus Vice Chair: Intelligence
22
22
Currentrank
22
Historicalrank
1903
Senator
Jim Risch
Party
Republican
State
Idaho
Seniority date
Former governor (7 months)
Other factors
Chair: Foreign Relations
23
23
Currentrank
23
Historicalrank
1905
Senator
Jeff Merkley
Party
Democratic
State
Oregon
Other factors
Ranking Member: Budget
24
24
Currentrank
24
Historicalrank
1909
Senator
Michael Bennet
Party
Colorado
Party
January 21, 2009
25
25
Currentrank
25
Historicalrank
1910
Senator
Kirsten Gillibrand
Party
New York
Party
January 26, 2009
State
Chair: DSCCRanking Member: Aging
26
26
Currentrank
26
Historicalrank
1917
Senator
Chris Coons
Party
Delaware
Party
November 15, 2010
State
Vice Chair: Ethics
27
27
Currentrank
27
Historicalrank
1920
Senator
Jerry Moran
Party
Republican
State
Kansas
Seniority date
January 3, 2011
Other factors
Former House member (14 years)
Committee andleadership positions
Chair: Veterans' Affairs
28
28
Currentrank
28
Historicalrank
1922
Senator
John Boozman
Party
Arkansas
Party
Former House member (9 years)
State
Chair: Agriculture
29
29
Currentrank
29
Historicalrank
1924
Senator
John Hoeven
Party
North Dakota
Party
Former governor
30
30
Currentrank
30
Historicalrank
1926
Senator
Ron Johnson
Party
Wisconsin
Party
Wisconsin 20th in population (2000)
31
31
Currentrank
31
Historicalrank
1927
Senator
Rand Paul
Party
Kentucky
Party
Kentucky 25th in population (2000)
State
Chair: Homeland Security
32
32
Currentrank
32
Historicalrank
1928
Senator
Richard Blumenthal
Party
Democratic
State
Connecticut
Seniority date
Connecticut 29th in population (2000)
Other factors
Ranking Member: Veterans' Affairs
33
33
Currentrank
33
Historicalrank
1929
Senator
Mike Lee
Party
Republican
State
Utah
Seniority date
Utah 34th in population (2000)
Other factors
Chair: Energy
34
34
Currentrank
34
Historicalrank
1932
Senator
Brian Schatz
Party
Democratic
State
Hawaii
Seniority date
December 26, 2012
Committee andleadership positions
Democratic Chief Deputy WhipDeputy Secretary: Democratic CaucusVice Chair: Indian Affairs
35
35
Currentrank
35
Historicalrank
1933
Senator
Tim Scott
Party
Republican
State
South Carolina
Seniority date
January 2, 2013
Other factors
Chair: NRSCChair: Banking
36
36
Currentrank
36
Historicalrank
1934
Senator
Tammy Baldwin
Party
Democratic
State
Wisconsin
Seniority date
January 3, 2013
Other factors
Former House member (14 years)
Committee andleadership positions
Secretary: Democratic Caucus
37
37
Currentrank
37
Historicalrank
1937
Senator
Chris Murphy
Party
Connecticut
Party
Former House member (6 years);Connecticut 29th in population (2010)
State
Deputy Secretary: Democratic Caucus
38
38
Currentrank
38
Historicalrank
1938
Senator
Mazie Hirono
Party
Hawaii
Party
Former House member (6 years);Hawaii 40th in population (2010)
39
39
Currentrank
39
Historicalrank
1939
Senator
Martin Heinrich
Party
New Mexico
Party
Former House member (4 years)
State
Ranking Member: Energy
40
40
Currentrank
40
Historicalrank
1940
Senator
Angus King
Party
Independent
State
Maine
Seniority date
Former governor (8 years)
41
41
Currentrank
41
Historicalrank
1941
Senator
Tim Kaine
Party
Democratic
State
Virginia
Seniority date
Former governor (4 years)
42
42
Currentrank
42
Historicalrank
1942
Senator
Ted Cruz
Party
Republican
State
Texas
Seniority date
Texas 2nd in population (2010)
Other factors
Chair: Commerce
43
43
Currentrank
43
Historicalrank
1943
Senator
Elizabeth Warren
Party
Democratic
State
Massachusetts
Seniority date
Massachusetts 14th in population (2010)
Other factors
Vice Chair: Democratic CaucusRanking Member: Banking
44
44
Currentrank
44
Historicalrank
1944
Senator
Deb Fischer
Party
Republican
State
Nebraska
Seniority date
Nebraska 38th in population (2010)
45
45
Currentrank
45
Historicalrank
1948
Senator
Ed Markey
Party
Democratic
State
Massachusetts
Seniority date
July 16, 2013
Committee andleadership positions
Ranking Member: Small Business
46
46
Currentrank
46
Historicalrank
1949
Senator
Cory Booker
Party
New Jersey
Party
October 31, 2013
State
Chair: Democratic Strategic Communications Committee
47
47
Currentrank
47
Historicalrank
1951
Senator
Shelley Moore Capito
Party
Republican
State
West Virginia
Seniority date
January 3, 2015
Other factors
Former House member (14 years)
Committee andleadership positions
Chair: Republican Policy CommitteeChair: Environment
48
48
Currentrank
48
Historicalrank
1952
Senator
Gary Peters
Party
Democratic
State
Michigan
Seniority date
Former House member (6 years);Michigan 8th in population (2010)
Other factors
Ranking Member: Homeland Security
49
49
Currentrank
49
Historicalrank
1953
Senator
Bill Cassidy
Party
Republican
State
Louisiana
Seniority date
Former House member (6 years);Louisiana 25th in population (2010)
Other factors
Chair: HELP
50
50
Currentrank
50
Historicalrank
1955
Senator
James Lankford
Party
Oklahoma
Party
Former House member (4 years)
State
Vice Chair: Republican ConferenceChair: Ethics
51
51
Currentrank
51
Historicalrank
1956
Senator
Tom Cotton
Party
Arkansas
Party
Former House member (2 years);Arkansas 32nd in population (2010)
State
Chair: Republican ConferenceChair: Intelligence
52
52
Currentrank
52
Historicalrank
1957
Senator
Steve Daines
Party
Montana
Party
Former House member (2 years);Montana 44th in population (2010)
53
53
Currentrank
53
Historicalrank
1958
Senator
Mike Rounds
Party
South Dakota
Party
Former governor
54
54
Currentrank
54
Historicalrank
1960
Senator
Thom Tillis
Party
North Carolina
Party
North Carolina 10th in population (2010)
55
55
Currentrank
55
Historicalrank
1961
Senator
Joni Ernst
Party
Iowa
Party
Iowa 30th in population (2010)
State
Chair: Small Business
56
56
Currentrank
56
Historicalrank
1963
Senator
Dan Sullivan
Party
Alaska
Party
Alaska 47th in population (2010)
57
57
Currentrank
57
Historicalrank
1964
Senator
Chris Van Hollen
Party
Democratic
State
Maryland
Seniority date
January 3, 2017
Other factors
Former House member (14 years)
58
58
Currentrank
58
Historicalrank
1965
Senator
Todd Young
Party
Republican
State
Indiana
Seniority date
Former House member (6 years)
59
59
Currentrank
59
Historicalrank
1966
Senator
Tammy Duckworth
Party
Democratic
State
Illinois
Seniority date
Former House member (4 years)
60
60
Currentrank
60
Historicalrank
1967
Senator
Maggie Hassan
Party
New Hampshire
Party
Former governor
61
61
Currentrank
61
Historicalrank
1969
Senator
John Kennedy
Party
Republican
State
Louisiana
Seniority date
Louisiana 25th in population (2010)
62
62
Currentrank
62
Historicalrank
1970
Senator
Catherine Cortez Masto
Party
Democratic
State
Nevada
Seniority date
Nevada 35th in population (2010)
Other factors
Vice Chair: Democratic Outreach Committee
63
63
Currentrank
63
Historicalrank
1972
Senator
Tina Smith
Party
Minnesota
Party
January 3, 2018
64
64
Currentrank
64
Historicalrank
1974
Senator
Cindy Hyde-Smith
Party
Republican
State
Mississippi
Seniority date
April 2, 2018
65
65
Currentrank
65
Historicalrank
1975
Senator
Marsha Blackburn
Party
Tennessee
Party
January 3, 2019
State
Former House member (16 years)
66
66
Currentrank
66
Historicalrank
1977
Senator
Kevin Cramer
Party
North Dakota
Party
Former House member (6 years)
67
67
Currentrank
67
Historicalrank
1979
Senator
Jacky Rosen
Party
Democratic
State
Nevada
Seniority date
Former House member (2 years)
68
68
Currentrank
68
Historicalrank
1982
Senator
Josh Hawley
Party
Republican
State
Missouri
69
69
Currentrank
69
Historicalrank
1983
Senator
Rick Scott
Party
Florida
Party
January 8, 2019
State
Chair: Republican Steering CommitteeChair: Aging
70
70
Currentrank
70
Historicalrank
1985
Senator
Mark Kelly
Party
Democratic
State
Arizona
Seniority date
December 2, 2020
71
71
Currentrank
71
Historicalrank
1986
Senator
Ben Ray Luján
Party
New Mexico
Party
January 3, 2021
State
Former House member (12 years)
72
72
Currentrank
72
Historicalrank
1987
Senator
Cynthia Lummis
Party
Republican
State
Wyoming
Seniority date
Former House member (8 years)
73
73
Currentrank
73
Historicalrank
1988
Senator
Roger Marshall
Party
Kansas
Party
Former House member (4 years)
74
74
Currentrank
74
Historicalrank
1989
Senator
John Hickenlooper
Party
Democratic
State
Colorado
Seniority date
Former governor
75
75
Currentrank
75
Historicalrank
1990
Senator
Bill Hagerty
Party
Republican
State
Tennessee
Seniority date
Tennessee 17th in population (2010)
76
76
Currentrank
76
Historicalrank
1991
Senator
Tommy Tuberville
Party
Alabama
Party
Alabama 23rd in population (2010)
77
77
Currentrank
77
Historicalrank
1992
Senator
Alex Padilla
Party
Democratic
State
California
Seniority date
January 18, 2021
Committee andleadership positions
Ranking Member: Rules
78
78
Currentrank
78
Historicalrank
1993
Senator
Jon Ossoff
Party
Georgia
Party
January 20, 2021
State
'O' 15th letter of the alphabet
79
79
Currentrank
79
Historicalrank
1994
Senator
Raphael Warnock
Party
'W' 23rd letter of the alphabet
80
80
Currentrank
80
Historicalrank
1995
Senator
Peter Welch
Party
Vermont
Party
January 3, 2023
State
Former House member (16 years)
81
81
Currentrank
81
Historicalrank
1996
Senator
Markwayne Mullin
Party
Republican
State
Oklahoma
Seniority date
Former House member (10 years)
82
82
Currentrank
82
Historicalrank
1997
Senator
Ted Budd
Party
North Carolina
Party
Former House member (6 years)
83
83
Currentrank
83
Historicalrank
1998
Senator
John Fetterman
Party
Democratic
State
Pennsylvania
Seniority date
Pennsylvania 5th in population (2020)
84
84
Currentrank
84
Historicalrank
2000
Senator
Eric Schmitt
Party
Republican
State
Missouri
Seniority date
Missouri 19th in population (2020)
85
85
Currentrank
85
Historicalrank
2001
Senator
Katie Britt
Party
Alabama
Party
Alabama 24th in population (2020)
86
86
Currentrank
86
Historicalrank
2002
Senator
Pete Ricketts
Party
Nebraska
Party
January 12, 2023
87
87
Currentrank
87
Historicalrank
2005
Senator
Adam Schiff
Party
Democratic
State
California
Seniority date
December 8, 2024
Other factors
Former House member (24 years)
88
88
Currentrank
88
Historicalrank
2006
Senator
Andy Kim
Party
New Jersey
Party
Former House member (6 years)
89
89
Currentrank
89
Historicalrank
2007
Senator
Ruben Gallego
Party
Arizona
Party
January 3, 2025
State
Former House member (10 years)
90
90
Currentrank
90
Historicalrank
2008
Senator
Jim Banks
Party
Republican
State
Indiana
Seniority date
Former House member (8 years);Indiana 17th in population (2020)
91
91
Currentrank
91
Historicalrank
2009
Senator
Lisa Blunt Rochester
Party
Democratic
State
Delaware
Seniority date
Former House member (8 years);Delaware 46th in population (2020)
92
92
Currentrank
92
Historicalrank
2010
Senator
John Curtis
Party
Republican
State
Utah
Seniority date
Former House member (7 years)
93
93
Currentrank
93
Historicalrank
2011
Senator
Elissa Slotkin
Party
Democratic
State
Michigan
Seniority date
Former House member (6 years)
94
94
Currentrank
94
Historicalrank
2012
Senator
Dave McCormick
Party
Republican
State
Pennsylvania
Seniority date
Pennsylvania 5th in population (2020)
95
95
Currentrank
95
Historicalrank
2013
Senator
Bernie Moreno
Party
Ohio
Party
Ohio 7th in population (2020)
96
96
Currentrank
96
Historicalrank
2014
Senator
Angela Alsobrooks
Party
Democratic
State
Maryland
Seniority date
Maryland 18th in population (2020)
97
97
Currentrank
97
Historicalrank
2015
Senator
Tim Sheehy
Party
Republican
State
Montana
Seniority date
Montana 44th in population (2020)
98
98
Currentrank
98
Historicalrank
2016
Senator
Jim Justice
Party
West Virginia
Party
January 14, 2025
99
99
Currentrank
99
Historicalrank
2017
Senator
Jon Husted
Party
Ohio
Party
January 18, 2025
100
100
Currentrank
100
Historicalrank
2018
Senator
Ashley Moody
Party
Florida
Party
January 21, 2025
Rank
Rank
Currentrank
Rank
Historicalrank
Historicalrank
Senator
Senator
Party
Party
Party
State
State
Seniority date
Seniority date
Other factors
Other factors
Committee and leadership positions
| Currentrank | Historicalrank | Senator | Party | State | Seniority date | Other factors | Committee andleadership positions | |
| 1 | 1743 | Chuck Grassley | Republican | Iowa | January 3, 1981 | President pro temporeChair: Judiciary | ||
| 2 | 1766 | Mitch McConnell | Kentucky | January 3, 1985 | Chair: Rules | |||
| 3 | 1812 | Patty Murray | Democratic | Washington | January 3, 1993 | President pro tempore emeritaVice Chair: Appropriations | ||
| 4 | 1827 | Ron Wyden | Oregon | February 6, 1996 | Ranking Member: Finance | |||
| 5 | 1831 | Dick Durbin | Illinois | January 3, 1997 | Former House member (14 years) | Senate Minority WhipRanking Member: Judiciary | ||
| 6 | 1835 | Jack Reed | Rhode Island | Former House member (6 years) | Ranking Member: Armed Services | |||
| 7 | 1842 | Susan Collins | Republican | Maine | Chair: Appropriations | |||
| 8 | 1844 | Chuck Schumer | Democratic | New York | January 3, 1999 | Former House member (18 years) | Senate Minority Leader | |
| 9 | 1846 | Mike Crapo | Republican | Idaho | Former House member (6 years) | Republican Chief Deputy WhipChair: Finance | ||
| 10 | 1859 | Maria Cantwell | Democratic | Washington | January 3, 2001 | Ranking Member: Commerce | ||
| 11 | 1867 | John Cornyn | Republican | Texas | December 2, 2002 | Chair: Narcotics Caucus | ||
| 12 | 1868 | Lisa Murkowski | Alaska | December 20, 2002 | Chair: Indian Affairs | |||
| 13 | 1870 | Lindsey Graham | South Carolina | January 3, 2003 | Chair: Budget | |||
| 14 | 1879 | John Thune | South Dakota | January 3, 2005 | Senate Majority Leader | |||
| 15 | 1887 | Bernie Sanders | Independent | Vermont | January 3, 2007 | Former House member | Chair: Democratic Outreach CommitteeRanking Member: HELP | |
| 16 | 1893 | Amy Klobuchar | Democratic | Minnesota | Minnesota 21st in population (2000) | Chair: Democratic Steering and Policy CommitteeRanking Member: Agriculture | ||
| 17 | 1894 | Sheldon Whitehouse | Rhode Island | Rhode Island 43rd in population (2000) | Ranking Member: EnvironmentRanking Member: Narcotics Caucus | |||
| 18 | 1896 | John Barrasso | Republican | Wyoming | June 22, 2007 | Senate Majority Whip | ||
| 19 | 1897 | Roger Wicker | Mississippi | December 31, 2007 | Chair: Armed Services | |||
| 20 | 1901 | Jeanne Shaheen | Democratic | New Hampshire | January 3, 2009 | Former governor (6 years) | Ranking Member: Foreign Relations | |
| 21 | 1902 | Mark Warner | Virginia | Former governor (4 years) | Vice Chair: Democratic Caucus Vice Chair: Intelligence | |||
| 22 | 1903 | Jim Risch | Republican | Idaho | Former governor (7 months) | Chair: Foreign Relations | ||
| 23 | 1905 | Jeff Merkley | Democratic | Oregon | Ranking Member: Budget | |||
| 24 | 1909 | Michael Bennet | Colorado | January 21, 2009 | ||||
| 25 | 1910 | Kirsten Gillibrand | New York | January 26, 2009 | Chair: DSCCRanking Member: Aging | |||
| 26 | 1917 | Chris Coons | Delaware | November 15, 2010 | Vice Chair: Ethics | |||
| 27 | 1920 | Jerry Moran | Republican | Kansas | January 3, 2011 | Former House member (14 years) | Chair: Veterans' Affairs | |
| 28 | 1922 | John Boozman | Arkansas | Former House member (9 years) | Chair: Agriculture | |||
| 29 | 1924 | John Hoeven | North Dakota | Former governor | ||||
| 30 | 1926 | Ron Johnson | Wisconsin | Wisconsin 20th in population (2000) | ||||
| 31 | 1927 | Rand Paul | Kentucky | Kentucky 25th in population (2000) | Chair: Homeland Security | |||
| 32 | 1928 | Richard Blumenthal | Democratic | Connecticut | Connecticut 29th in population (2000) | Ranking Member: Veterans' Affairs | ||
| 33 | 1929 | Mike Lee | Republican | Utah | Utah 34th in population (2000) | Chair: Energy | ||
| 34 | 1932 | Brian Schatz | Democratic | Hawaii | December 26, 2012 | Democratic Chief Deputy WhipDeputy Secretary: Democratic CaucusVice Chair: Indian Affairs | ||
| 35 | 1933 | Tim Scott | Republican | South Carolina | January 2, 2013 | Chair: NRSCChair: Banking | ||
| 36 | 1934 | Tammy Baldwin | Democratic | Wisconsin | January 3, 2013 | Former House member (14 years) | Secretary: Democratic Caucus | |
| 37 | 1937 | Chris Murphy | Connecticut | Former House member (6 years);Connecticut 29th in population (2010) | Deputy Secretary: Democratic Caucus | |||
| 38 | 1938 | Mazie Hirono | Hawaii | Former House member (6 years);Hawaii 40th in population (2010) | ||||
| 39 | 1939 | Martin Heinrich | New Mexico | Former House member (4 years) | Ranking Member: Energy | |||
| 40 | 1940 | Angus King | Independent | Maine | Former governor (8 years) | |||
| 41 | 1941 | Tim Kaine | Democratic | Virginia | Former governor (4 years) | |||
| 42 | 1942 | Ted Cruz | Republican | Texas | Texas 2nd in population (2010) | Chair: Commerce | ||
| 43 | 1943 | Elizabeth Warren | Democratic | Massachusetts | Massachusetts 14th in population (2010) | Vice Chair: Democratic CaucusRanking Member: Banking | ||
| 44 | 1944 | Deb Fischer | Republican | Nebraska | Nebraska 38th in population (2010) | |||
| 45 | 1948 | Ed Markey | Democratic | Massachusetts | July 16, 2013 | Ranking Member: Small Business | ||
| 46 | 1949 | Cory Booker | New Jersey | October 31, 2013 | Chair: Democratic Strategic Communications Committee | |||
| 47 | 1951 | Shelley Moore Capito | Republican | West Virginia | January 3, 2015 | Former House member (14 years) | Chair: Republican Policy CommitteeChair: Environment | |
| 48 | 1952 | Gary Peters | Democratic | Michigan | Former House member (6 years);Michigan 8th in population (2010) | Ranking Member: Homeland Security | ||
| 49 | 1953 | Bill Cassidy | Republican | Louisiana | Former House member (6 years);Louisiana 25th in population (2010) | Chair: HELP | ||
References
- "Historical rank" refers to the senator's seniority over the entire history of the Senate since 1789. This is an absolut
- Maria Cantwell (#10) is the Senate's most senior junior senator.
- The seniority date for an appointed senator is the date of the appointment, not necessarily the date of taking the oath
- Bernie Moreno (#95) is the Senate's most junior senior senator.
- Intelligencerhttps://nymag.com/intelligencer/2021/11/californians-move-toward-lock-on-presidential-succession.html
- Roll Callhttps://rollcall.com/2022/12/02/halls-of-powerball-new-house-members-pick-their-offices-via-lottery/
- "Senators of the United States 1789–present, A chronological list of senators since the First Congress in 1789"https://www.senate.gov/artandhistory/history/resources/pdf/chronlist.pdf
- The Muskegon Chroniclehttps://bsky.app/profile/yeargain.bsky.social/post/3lcgjewggdc2w
- The Atlanta Journal-Constitutionhttps://www.ajc.com/politics/a-new-era-ossoff-warnock-sworn-into-office-giving-democrats-control-of-senate/G4VMKL3ZGFH3TONBEPDF5LPMHI/
- 11Alive.comhttps://www.11alive.com/article/news/politics/why-jon-ossoff-georgia-senior-senator/85-03912222-b439-429f-8685-1557cb05c049
- "2000 Census State Population Rankings"https://webarchive.loc.gov/all/20090403062125/http://factfinder.census.gov/servlet/GCTTable?_bm=n&_lang=en&mt_name=DEC_2000_SF1_U_GCTPH1R_US9S&format=US-9S&_box_head_nbr=GCT-PH1-R&ds_name=DEC_2000_SF1_U&geo_id=01000US
- "Resident Population Data (Text Version) – 2010 Census, by state and census region"https://www.census.gov/2010census/data/apportionment-pop-text.php
- Ledger-Enquirerhttps://www.ledger-enquirer.com/news/state/georgia/article248630765.html