Current rank
|
Historical rank
|
Senator
|
Party
|
State
|
Seniority date
|
Other factors
|
Committee and leadership positions
|
1
|
1743
|
Chuck Grassley
|
|
Republican
|
Iowa
|
January 3, 1981
|
|
President pro tempore emeritus Ranking Member: Budget Ranking Member: Narcotics Caucus
|
2
|
1766
|
Mitch McConnell
|
Kentucky
|
January 3, 1985
|
Senate Minority Leader
|
3
|
1810
|
Patty Murray
|
|
Democratic
|
Washington
|
January 3, 1993
|
President pro tempore Chair: Appropriations
|
4
|
1827
|
Ron Wyden
|
Oregon
|
February 6, 1996
|
Chair: Finance
|
5
|
1831
|
Dick Durbin
|
Illinois
|
January 3, 1997
|
Former House member (14 years)
|
Senate Majority Whip Chair: Judiciary
|
6
|
1835
|
Jack Reed
|
Rhode Island
|
Former House member (6 years)
|
Chair: Armed Services
|
7
|
1842
|
Susan Collins
|
|
Republican
|
Maine
|
|
Ranking Member: Appropriations
|
8
|
1844
|
Chuck Schumer
|
|
Democratic
|
New York
|
January 3, 1999
|
Former House member (18 years)
|
Senate Majority Leader
|
9
|
1846
|
Mike Crapo
|
|
Republican
|
Idaho
|
Former House member (6 years)
|
Republican Chief Deputy Whip Ranking Member: Finance
|
10
|
1855
|
Tom Carper
|
|
Democratic
|
Delaware
|
January 3, 2001
|
Former House member (10 years)
|
Chair: Environment
|
11
|
1856
|
Debbie Stabenow
|
Michigan
|
Former House member (4 years)
|
Chair: Democratic Policy Committee Chair: Agriculture
|
12
|
1859
|
Maria Cantwell
|
Washington
|
Former House member (2 years)
|
Chair: Commerce
|
13
|
1867
|
John Cornyn
|
|
Republican
|
Texas
|
December 2, 2002
|
|
|
14
|
1868
|
Lisa Murkowski
|
Alaska
|
December 20, 2002
|
Ranking Member: Indian Affairs
|
15
|
1870
|
Lindsey Graham
|
South Carolina
|
January 3, 2003
|
Ranking Member: Judiciary
|
16
|
1879
|
John Thune
|
South Dakota
|
January 3, 2005
|
Senate Minority Whip
|
17
|
1885
|
Bob Menendez
|
|
Democratic
|
New Jersey
|
January 17, 2006
|
|
18
|
1886
|
Ben Cardin
|
Maryland
|
January 3, 2007
|
Former House member (20 years)
|
Chair: Foreign Relations
|
19
|
1887
|
Bernie Sanders
|
|
Independent
|
Vermont
|
Former House member (16 years)
|
Chair: Democratic Outreach Committee Chair: HELP
|
20
|
1888
|
Sherrod Brown
|
|
Democratic
|
Ohio
|
Former House member (14 years)
|
Chair: Banking
|
21
|
1890
|
Bob Casey Jr.
|
Pennsylvania
|
Pennsylvania 6th in population (2000)
|
Chair: Aging
|
22
|
1893
|
Amy Klobuchar
|
Minnesota
|
Minnesota 21st in population (2000)
|
Chair: Democratic Steering Committee Chair: Rules
|
23
|
1894
|
Sheldon Whitehouse
|
Rhode Island
|
Rhode Island 43rd in population (2000)
|
Chair: Budget Chair: Narcotics Caucus
|
24
|
1895
|
Jon Tester
|
Montana
|
Montana 44th in population (2000)
|
Chair: Veterans' Affairs
|
25
|
1896
|
John Barrasso
|
|
Republican
|
Wyoming
|
June 22, 2007
|
|
Chair: Republican Conference Ranking Member: Energy
|
26
|
1897
|
Roger Wicker
|
Mississippi
|
December 31, 2007
|
Ranking Member: Armed Services
|
27
|
1901
|
Jeanne Shaheen
|
|
Democratic
|
New Hampshire
|
January 3, 2009
|
Former governor (6 years)
|
Vice Chair: Democratic Steering Committee Chair: Small Business
|
28
|
1902
|
Mark Warner
|
Virginia
|
Former governor (4 years)
|
Vice Chair: Democratic Caucus Chair: Intelligence
|
29
|
1903
|
Jim Risch
|
|
Republican
|
Idaho
|
Former governor (7 months)
|
Ranking Member: Foreign Relations
|
30
|
1905
|
Jeff Merkley
|
|
Democratic
|
Oregon
|
|
Democratic Chief Deputy Whip
|
31
|
1909
|
Michael Bennet
|
Colorado
|
January 21, 2009
|
|
32
|
1910
|
Kirsten Gillibrand
|
New York
|
January 26, 2009
|
33
|
1916
|
Joe Manchin
|
|
Independent
|
West Virginia
|
November 15, 2010
|
Former governor
|
Vice Chair: Democratic Policy Committee Chair: Energy
|
34
|
1917
|
Chris Coons
|
|
Democratic
|
Delaware
|
|
Chair: Ethics
|
35
|
1920
|
Jerry Moran
|
|
Republican
|
Kansas
|
January 3, 2011
|
Former House member (14 years)
|
Ranking Member: Veterans' Affairs
|
36
|
1922
|
John Boozman
|
Arkansas
|
Former House member (9 years)
|
Ranking Member: Agriculture
|
37
|
1924
|
John Hoeven
|
North Dakota
|
Former governor
|
|
38
|
1925
|
Marco Rubio
|
Florida
|
Florida 4th in population (2000)
|
Vice Chair: Intelligence
|
39
|
1926
|
Ron Johnson
|
Wisconsin
|
Wisconsin 20th in population (2000)
|
|
40
|
1927
|
Rand Paul
|
Kentucky
|
Kentucky 25th in population (2000)
|
Ranking Member: Homeland Security
|
41
|
1928
|
Richard Blumenthal
|
|
Democratic
|
Connecticut
|
Connecticut 29th in population (2000)
|
|
42
|
1929
|
Mike Lee
|
|
Republican
|
Utah
|
Utah 34th in population (2000)
|
Chair: Republican Steering Committee
|
43
|
1932
|
Brian Schatz
|
|
Democratic
|
Hawaii
|
December 26, 2012
|
|
Deputy Secretary: Democratic Caucus Chair: Indian Affairs
|
44
|
1933
|
Tim Scott
|
|
Republican
|
South Carolina
|
January 2, 2013
|
Ranking Member: Banking
|
45
|
1934
|
Tammy Baldwin
|
|
Democratic
|
Wisconsin
|
January 3, 2013
|
Former House member (14 years)
|
Secretary: Democratic Caucus
|
46
|
1937
|
Chris Murphy
|
Connecticut
|
Former House member (6 years); Connecticut 29th in population (2010)
|
|
47
|
1938
|
Mazie Hirono
|
Hawaii
|
Former House member (6 years); Hawaii 40th in population (2010)
|
48
|
1939
|
Martin Heinrich
|
New Mexico
|
Former House member (4 years)
|
49
|
1940
|
Angus King
|
|
Independent
|
Maine
|
Former governor (8 years)
|
50
|
1941
|
Tim Kaine
|
|
Democratic
|
Virginia
|
Former governor (4 years)
|
51
|
1942
|
Ted Cruz
|
|
Republican
|
Texas
|
Texas 2nd in population (2010)
|
Ranking Member: Commerce
|
52
|
1943
|
Elizabeth Warren
|
|
Democratic
|
Massachusetts
|
Massachusetts 14th in population (2010)
|
Vice Chair: Democratic Caucus
|
53
|
1944
|
Deb Fischer
|
|
Republican
|
Nebraska
|
Nebraska 38th in population (2010)
|
Ranking Member: Rules
|
54
|
1948
|
Ed Markey
|
|
Democratic
|
Massachusetts
|
July 16, 2013
|
|
|
55
|
1949
|
Cory Booker
|
New Jersey
|
October 31, 2013
|
Vice Chair: Democratic Policy Committee
|
56
|
1951
|
Shelley Moore Capito
|
|
Republican
|
West Virginia
|
January 3, 2015
|
Former House member (14 years)
|
Vice Chair: Republican Conference Ranking Member: Environment
|
57
|
1952
|
Gary Peters
|
|
Democratic
|
Michigan
|
Former House member (6 years); Michigan 8th in population (2010)
|
Chair: DSCC Chair: Homeland Security
|
58
|
1953
|
Bill Cassidy
|
|
Republican
|
Louisiana
|
Former House member (6 years); Louisiana 25th in population (2010)
|
Ranking Member: HELP
|
59
|
1955
|
James Lankford
|
Oklahoma
|
Former House member (4 years)
|
Ranking Member: Ethics
|
60
|
1956
|
Tom Cotton
|
Arkansas
|
Former House member (2 years); Arkansas 32nd in population (2010)
|
|
61
|
1957
|
Steve Daines
|
Montana
|
Former House member (2 years); Montana 44th in population (2010)
|
Chair: NRSC
|
62
|
1958
|
Mike Rounds
|
South Dakota
|
Former governor
|
|
63
|
1960
|
Thom Tillis
|
North Carolina
|
North Carolina 10th in population (2010)
|
64
|
1961
|
Joni Ernst
|
Iowa
|
Iowa 30th in population (2010)
|
Chair: Republican Policy Committee Ranking Member: Small Business
|
65
|
1963
|
Dan Sullivan
|
Alaska
|
Alaska 47th in population (2010)
|
|
66
|
1964
|
Chris Van Hollen
|
|
Democratic
|
Maryland
|
January 3, 2017
|
Former House member (14 years)
|
67
|
1965
|
Todd Young
|
|
Republican
|
Indiana
|
Former House member (6 years)
|
68
|
1966
|
Tammy Duckworth
|
|
Democratic
|
Illinois
|
Former House member (4 years)
|
69
|
1967
|
Maggie Hassan
|
New Hampshire
|
Former governor
|
70
|
1969
|
John Neely Kennedy
|
|
Republican
|
Louisiana
|
Louisiana 25th in population (2010)
|
71
|
1970
|
Catherine Cortez Masto
|
|
Democratic
|
Nevada
|
Nevada 35th in population (2010)
|
Vice Chair: Democratic Outreach Committee
|
72
|
1972
|
Tina Smith
|
Minnesota
|
January 3, 2018
|
|
Vice Chair: DSCC
|
73
|
1974
|
Cindy Hyde-Smith
|
|
Republican
|
Mississippi
|
April 2, 2018
|
|
74
|
1975
|
Marsha Blackburn
|
Tennessee
|
January 3, 2019
|
Former House member (16 years)
|
75
|
1976
|
Kyrsten Sinema
|
|
Independent
|
Arizona
|
Former House member (6 years); Arizona 16th in population (2010)
|
76
|
1977
|
Kevin Cramer
|
|
Republican
|
North Dakota
|
Former House member (6 years); North Dakota 48th in population (2010)
|
77
|
1979
|
Jacky Rosen
|
|
Democratic
|
Nevada
|
Former House member (2 years)
|
78
|
1980
|
Mitt Romney
|
|
Republican
|
Utah
|
Former governor
|
79
|
1981
|
Mike Braun
|
Indiana
|
Indiana 15th in population (2010)
|
Ranking Member: Aging
|
80
|
1982
|
Josh Hawley
|
Missouri
|
Missouri 18th in population (2010)
|
|
81
|
1983
|
Rick Scott
|
Florida
|
January 8, 2019
|
|
82
|
1985
|
Mark Kelly
|
|
Democratic
|
Arizona
|
December 2, 2020
|
83
|
1986
|
Ben Ray Luján
|
New Mexico
|
January 3, 2021
|
Former House member (12 years)
|
84
|
1987
|
Cynthia Lummis
|
|
Republican
|
Wyoming
|
Former House member (8 years)
|
85
|
1988
|
Roger Marshall
|
Kansas
|
Former House member (4 years)
|
86
|
1989
|
John Hickenlooper
|
|
Democratic
|
Colorado
|
Former governor
|
87
|
1990
|
Bill Hagerty
|
|
Republican
|
Tennessee
|
Tennessee 17th in population (2010)
|
88
|
1991
|
Tommy Tuberville
|
Alabama
|
Alabama 23rd in population (2010)
|
89
|
1992
|
Alex Padilla
|
|
Democratic
|
California
|
January 18, 2021
|
|
Vice Chair: DSCC
|
90
|
1993
|
Jon Ossoff
|
Georgia
|
January 20, 2021
|
'O' 15th letter of the alphabet
|
|
91
|
1994
|
Raphael Warnock
|
'W' 23rd letter of the alphabet
|
92
|
1995
|
Peter Welch
|
Vermont
|
January 3, 2023
|
Former House member (16 years)
|
93
|
1996
|
Markwayne Mullin
|
|
Republican
|
Oklahoma
|
Former House member (10 years)
|
94
|
1997
|
Ted Budd
|
North Carolina
|
Former House member (6 years)
|
95
|
1998
|
John Fetterman
|
|
Democratic
|
Pennsylvania
|
Pennsylvania 5th in population (2020)
|
96
|
1999
|
J. D. Vance
|
|
Republican
|
Ohio
|
Ohio 7th in population (2020)
|
97
|
2000
|
Eric Schmitt
|
Missouri
|
Missouri 19th in population (2020)
|
98
|
2001
|
Katie Britt
|
Alabama
|
Alabama 24th in population (2020)
|
99
|
2002
|
Pete Ricketts
|
Nebraska
|
January 12, 2023
|
|
100
|
2003
|
Laphonza Butler
|
|
Democratic
|
California
|
October 1, 2023
|
Rank
|
Historical rank
|
Senator
|
Party
|
State
|
Seniority date
|
Other factors
|
Committee and leadership positions
|