User:DukeOfDelTaco/sandbox/List of United States senators by seniority
| Cong ress |
Senator | Party | State | Seniority Date |
Left office |
Notes |
|---|---|---|---|---|---|---|
| 83rd | Strom Thurmond[a] | Democratic | South Carolina | December 24, 1954 | April 4, 1956 | |
| 84th | Thomas A. Wofford | Democratic | South Carolina | April 5, 1956 | November 6, 1956 | |
| Strom Thurmond[a] | Democratic[b] | South Carolina | November 7, 1956 | January 3, 2003 | ||
| 86th | Robert Byrd | Democratic | West Virginia | January 3, 1959 | June 28, 2010 | |
| 87th | Claiborne Pell | Democratic | Rhode Island | January 3, 1961 | January 3, 1997 | |
| Ted Kennedy | Democratic | Massachusetts | November 7, 1962 | August 25, 2009 | ||
| 88th | Daniel Inouye | Democratic | Hawaii | January 3, 1963 | December 17, 2012 | |
| 89th | Fritz Hollings | Democratic | South Carolina | November 9, 1966 | January 3, 2005 | |
| 90th | Mark Hatfield | Republican | Oregon | January 10, 1967 | January 3, 1997 | |
| Ted Stevens | Republican | Alaska | December 24, 1968 | January 3, 2009 | ||
| 91st | Bob Dole | Republican | Kansas | January 3, 1969 | June 11, 1996 | Former representative |
| William B. Saxbe | Republican | Ohio | January 3, 1974 | Ohio 5th in population (1960) | ||
| Bob Packwood | Republican | Oregon | October 1, 1995 | Oregon 32nd in population (1960) | ||
| William Roth | Republican | Delaware | January 1, 1971 | January 3, 2001 | ||
| 92nd | Lloyd Bentsen | Democratic | Texas | January 3, 1971 | January 20, 1993 | Former representative (6 years) |
| Robert Taft Jr. | Republican | Ohio | December 28, 1976 | Former representative (2 years) | ||
| Sam Nunn | Democratic | Georgia | November 8, 1972 | January 3, 1997 | ||
| J. Bennett Johnston | Democratic | Louisiana | November 14, 1972 | |||
| 93rd | Jesse Helms | Republican | North Carolina | January 3, 1973 | January 3, 2003 | North Carolina 12th in population (1970) |
| Pete Domenici | Republican | New Mexico | January 3, 2009 | New Mexico 37th in population (1970) | ||
| Joe Biden | Democratic | Delaware | January 15, 2009 | Delaware 46th in population (1970) | ||
| Howard Metzenbaum[a] | Democratic | Ohio | January 4, 1974 | December 23, 1974 | ||
| John Glenn | Democratic | Ohio | December 24, 1974 | January 3, 1999 | ||
| Wendell Ford | Democratic | Kentucky | December 28, 1974 | |||
| 94th | Dale Bumpers | Democratic | Arkansas | January 3, 1975 | Former governor | |
| Patrick Leahy | Democratic | Vermont | January 3, 2023 | |||
| John Danforth | Republican | Missouri | December 27, 1976 | January 3, 1995 | ||
| John Chafee | Republican | Rhode Island | December 29, 1976 | October 24, 1999 | Former governor | |
| Howard Metzenbaum[a] | Democratic | Ohio | January 3, 1995 | |||
| Donald Riegle | Democratic | Michigan | December 30, 1976 | |||
| 95th | Paul Sarbanes | Democratic | Maryland | January 3, 1977 | January 3, 2007 | Former representative (6 years) |
| John Heinz | Republican | Pennsylvania | April 4, 1991 | Former representative (5 years) | ||
| Daniel Patrick Moynihan | Democratic | New York | January 3, 2001 | Former cabinet member | ||
| Richard Lugar | Republican | Indiana | January 3, 2013 | Indiana 11th in population (1970) | ||
| Jim Sasser | Democratic | Tennessee | January 3, 1995 | Tennessee 17th in population (1970) | ||
| Dennis DeConcini | Democratic | Arizona | Arizona 33rd in population (1970) | |||
| Orrin Hatch | Republican | Utah | January 3, 2019 | Utah 36th in population (1970) | ||
| Malcolm Wallop | Republican | Wyoming | January 3, 1995 | Wyoming 49th in population (1970) | ||
| David Durenberger | Republican | Minnesota | November 8, 1978 | |||
| Max Baucus | Democratic | Montana | December 15, 1978 | February 6, 2014 | ||
| Nancy Kassebaum | Republican | Kansas | December 23, 1978 | January 3, 1997 | ||
| Thad Cochran | Republican | Mississippi | December 27, 1978 | April 1, 2018 | ||
| Alan Simpson | Republican | Wyoming | January 1, 1979 | January 3, 1997 | ||
| John Warner | Republican | Virginia | January 2, 1979 | January 3, 2009 | ||
| 96th | David Pryor | Democratic | Arkansas | January 3, 1979 | January 3, 1997 | Former representative (6 years); former governor |
| William Cohen | Republican | Maine | Former representative (6 years) | |||
| Larry Pressler | Republican | South Dakota | Former representative (4 years) | |||
| J. James Exon | Democratic | Nebraska | Former governor (8 years) | |||
| David Boren | Democratic | Oklahoma | November 15, 1994 | Former governor (4 years) | ||
| Carl Levin | Democratic | Michigan | January 3, 2015 | Michigan 7th in population (1970) | ||
| Bill Bradley | Democratic | New Jersey | January 3, 1997 | New Jersey 8th in population (1970) | ||
| Howell Heflin | Democratic | Alabama | Alabama 21st in population (1970) | |||
| George J. Mitchell | Democratic | Maine | May 17, 1980 | January 3, 1995 | ||
| 97th | Chris Dodd | Democratic | Connecticut | January 3, 1981 | January 3, 2011 | Former representative (6 years); Connecticut 24th in population (1970) |
| Chuck Grassley | Republican | Iowa | Incumbent | Former representative (6 years); Iowa 25th in population (1970) | ||
| Al D'Amato | Republican | New York | January 3, 1999 | New York 2nd in population (1970) | ||
| Arlen Specter | Republican[c] | Pennsylvania | January 3, 2011 | Pennsylvania 3rd in population (1970) | ||
| Slade Gorton[a] | Republican | Washington | January 3, 1987 | Washington 22nd in population (1970) | ||
| Don Nickles | Republican | Oklahoma | January 3, 2005 | Oklahoma 27th in population (1970) | ||
| Frank Murkowski | Republican | Alaska | December 2, 2002 | Alaska 50th in population (1970) | ||
| Frank Lautenberg[a] | Democratic | New Jersey | December 27, 1982 | January 3, 2001 | ||
| 98th | Jeff Bingaman | Democratic | New Mexico | January 3, 1983 | January 3, 2013 | |
| John Kerry | Democratic | Massachusetts | January 2, 1985 | February 1, 2013 | ||
| 99th | Paul Simon | Democratic | Illinois | January 3, 1985 | January 3, 1997 | Former representative (10 years); Illinois 5th in population (1980) |
| Tom Harkin | Democratic | Iowa | January 3, 2015 | Former representative (10 years); Iowa 27th in population (1980) | ||
| Al Gore | Democratic | Tennessee | January 2, 1993 | Former representative (8 years) | ||
| Phil Gramm | Republican | Texas | November 30, 2002 | Former representative (6 years) | ||
| Mitch McConnell | Republican | Kentucky | Incumbent | |||
| Jay Rockefeller | Democratic | West Virginia | January 15, 1985 | January 3, 2015 | ||
| 100th | John Breaux | Democratic | Louisiana | January 3, 1987 | January 3, 2005 | Former representative (14 years) |
| Barbara Mikulski | Democratic | Maryland | January 3, 2017 | Former representative (10 years) | ||
| Richard Shelby | Democratic[d] | Alabama | January 3, 2023 | Former representative (8 years); Alabama 22nd in population (1980) | ||
| Tom Daschle | Democratic | South Dakota | January 3, 2005 | Former representative (8 years); South Dakota 45th in population (1980) | ||
| John McCain | Republican | Arizona | August 25, 2018 | Former representative (4 years); Arizona 29th in population (1980) | ||
| Harry Reid | Democratic | Nevada | January 3, 2017 | Former representative (4 years); Nevada 43rd in population (1980) | ||
| Bob Graham | Democratic | Florida | January 3, 2005 | Former governor (8 years); Florida 7th in population (1980) | ||
| Kit Bond | Republican | Missouri | January 3, 2011 | Former governor (8 years); Missouri 15th in population (1980) | ||
| Kent Conrad | Democratic | North Dakota | January 3, 2013 | |||
| 101st | Slade Gorton[a] | Republican | Washington | January 3, 1989 | January 3, 2001 | Former senator |
| Trent Lott | Republican | Mississippi | December 18, 2007 | Former representative (16 years) | ||
| Jim Jeffords | Republican[e] | Vermont | January 3, 2007 | Former representative (14 years) | ||
| Dan Coats[a] | Republican | Indiana | January 3, 1999 | Former representative (8 years) | ||
| Connie Mack III | Republican | Florida | January 3, 2001 | Former representative (6 years) | ||
| Richard Bryan | Democratic | Nevada | Former governor (6 years) | |||
| Chuck Robb | Democratic | Virginia | Former governor (4 years); Virginia 14th in population (1980) | |||
| Bob Kerrey | Democratic | Nebraska | Former governor (4 years); Nebraska 35th in population (1980) | |||
| Herb Kohl | Democratic | Wisconsin | January 3, 2013 | Wisconsin 16th in population (1980) | ||
| Joe Lieberman | Democratic[f] | Connecticut | Connecticut 25th in population (1980) | |||
| Conrad Burns | Republican | Montana | January 3, 2007 | Montana 44th in population (1980) | ||
| Daniel Akaka | Democratic | Hawaii | May 16, 1990 | January 3, 2013 | ||
| Bob Smith | Republican | New Hampshire | December 7, 1990 | January 3, 2003 | ||
| 102nd | Hank Brown | Republican | Colorado | January 3, 1991 | January 3, 1997 | Former representative (10 years); Colorado 28th in population (1980) |
| Larry Craig | Republican | Idaho | January 3, 2009 | Former representative (10 years); Idaho 41st in population (1980) | ||
| Paul Wellstone | Democratic | Minnesota | October 25, 2002 | |||
| Harris Wofford | Democratic | Pennsylvania | May 8, 1991 | January 3, 1995 | ||
| Dianne Feinstein | Democratic | California | November 4, 1992 | Incumbent | ||
| Byron Dorgan | Democratic | North Dakota | December 14, 1992 | January 3, 2011 | ||
| Harlan Mathews | Democratic | Tennessee | January 2, 1993 | December 1, 1994 | ||
| 103rd | Barbara Boxer | Democratic | California | January 3, 1993 | January 3, 2017 | Former representative (10 years) |
| Judd Gregg | Republican | New Hampshire | January 3, 2011 | Former representative (8 years) | ||
| Ben Nighthorse Campbell | Democratic[g] | Colorado | January 3, 2005 | Former representative (6 years) | ||
| Carol Moseley Braun | Democratic | Illinois | January 3, 1999 | Illinois 6th in population (1990) | ||
| Lauch Faircloth | Republican | North Carolina | North Carolina 10th in population (1990) | |||
| Paul Coverdell | Republican | Georgia | July 18, 2000 | Georgia 11th in population (1990) | ||
| Russ Feingold | Democratic | Wisconsin | January 3, 2011 | Wisconsin 16th in population (1990) | ||
| Patty Murray | Democratic | Washington | Incumbent | Washington 18th in population (1990) | ||
| Bob Bennett | Republican | Utah | January 3, 2011 | Utah 35th in population (1990) | ||
| Dirk Kempthorne | Republican | Idaho | January 3, 1999 | Idaho 42nd in population (1990) | ||
| Bob Krueger | Democratic | Texas | January 21, 1993 | June 14, 1993 | ||
| Kay Bailey Hutchison | Republican | Texas | June 14, 1993 | January 3, 2013 | ||
| Jim Inhofe | Republican | Oklahoma | November 16, 1994 | January 3, 2023 | ||
| Fred Thompson | Republican | Tennessee | December 2, 1994 | January 3, 2003 | ||
| 104th | Mike DeWine | Republican | Ohio | January 3, 1995 | January 3, 2007 | Former representative (8 years); Ohio 7th in population (1990) |
| Jon Kyl[a] | Republican | Arizona | January 3, 2013 | Former representative (8 years); Arizona 24th in population (1990) | ||
| Craig L. Thomas | Republican | Wyoming | June 4, 2007 | Former representative (5 years) | ||
| Rick Santorum | Republican | Pennsylvania | January 3, 2007 | Former representative (4 years) | ||
| Rod Grams | Republican | Minnesota | January 3, 2001 | Former representative (2 years) | ||
| John Ashcroft | Republican | Missouri | Former governor | |||
| Spencer Abraham | Republican | Michigan | Michigan 8th in population (1990) | |||
| Bill Frist | Republican | Tennessee | January 3, 2007 | Tennessee 17th in population (1990) | ||
| Olympia Snowe | Republican | Maine | January 3, 2013 | Maine 38th in population (1990) | ||
| Ron Wyden | Democratic | Oregon | February 5, 1996 | Incumbent | ||
| Sheila Frahm | Republican | Kansas | June 11, 1996 | November 7, 1996 | ||
| Sam Brownback | Republican | Kansas | November 7, 1996 | January 3, 2011 | ||
| 105th | Pat Roberts | Republican | Kansas | January 3, 1997 | January 3, 2021 | Former representative (16 years) |
| Dick Durbin | Democratic | Illinois | Incumbent | Former representative (14 years); Illinois 6th in population (1990) | ||
| Robert Torricelli | Democratic | New Jersey | January 3, 2003 | Former representative (14 years); New Jersey 9th in population (1990) | ||
| Tim Johnson | Democratic | South Dakota | January 3, 2015 | Former representative (10 years) | ||
| Wayne Allard | Republican | Colorado | January 3, 2009 | Former representative (6 years); Colorado 26th in population (1990) | ||
| Jack Reed | Democratic | Rhode Island | Incumbent | Former representative (6 years); Rhode Island 43rd in population (1990) | ||
| Tim Hutchinson | Republican | Arkansas | January 3, 2003 | Former representative (4 years) | ||
| Max Cleland | Democratic | Georgia | Georgia 11th in population (1990) | |||
| Mary Landrieu | Democratic | Louisiana | January 3, 2015 | Louisiana 21st in population (1990) | ||
| Jeff Sessions | Republican | Alabama | February 8, 2017 | Alabama 22nd in population (1990) | ||
| Gordon H. Smith | Republican | Oregon | January 3, 2009 | Oregon 29th in population (1990) | ||
| Chuck Hagel | Republican | Nebraska | Nebraska 36th in population (1990) | |||
| Susan Collins | Republican | Maine | Incumbent | Maine 38th in population (1990) | ||
| Mike Enzi | Republican | Wyoming | January 3, 2021 | Wyoming 50th in population (1990) | ||
| 106th | Chuck Schumer | Democratic | New York | January 3, 1999 | Incumbent | Former representative (18 years) |
| Jim Bunning | Republican | Kentucky | January 3, 2011 | Former representative (12 years) | ||
| Mike Crapo | Republican | Idaho | Incumbent | Former representative (6 years) | ||
| Blanche Lincoln | Democratic | Arkansas | January 3, 2011 | Former representative (4 years) | ||
| Evan Bayh | Democratic | Indiana | Former governor (8 years) | |||
| George Voinovich | Republican | Ohio | Former governor (7 years) | |||
| Peter Fitzgerald | Republican | Illinois | January 3, 2005 | Illinois 6th in population (1990) | ||
| John Edwards | Democratic | North Carolina | North Carolina 10th in population (1990) | |||
| Lincoln Chafee | Republican | Rhode Island | November 2, 1999 | January 3, 2007 | ||
| Zell Miller | Democratic | Georgia | July 24, 2000 | January 3, 2005 | ||
| 107th | Bill Nelson | Democratic | Florida | January 3, 2001 | January 3, 2019 | Former representative (12 years) |
| Tom Carper | Democratic | Delaware | Incumbent | Former representative (10 years) | ||
| Debbie Stabenow | Democratic | Michigan | Former representative (4 years); Michigan 8th in population (1990) | |||
| John Ensign | Republican | Nevada | May 3, 2011 | Former representative (4 years); Nevada 39th in population (1990) | ||
| George Allen | Republican | Virginia | January 3, 2007 | Former representative (2 years); former governor | ||
| Maria Cantwell | Democratic | Washington | Incumbent | Former representative (2 years) | ||
| Ben Nelson | Democratic | Nebraska | January 3, 2013 | Former governor | ||
| Hillary Clinton | Democratic | New York | January 21, 2009 | New York 2nd in population (1990) | ||
| Jon Corzine | Democratic | New Jersey | January 17, 2006 | New Jersey 9th in population (1990) | ||
| Jean Carnahan | Democratic | Missouri | November 23, 2002 | Missouri 15th in population (1990) | ||
| Mark Dayton | Democratic | Minnesota | January 3, 2007 | Minnesota 20th in population (1990) | ||
| Dean Barkley | Independence | Minnesota | November 4, 2002 | January 3, 2003 | ||
| Jim Talent | Republican | Missouri | November 23, 2002 | January 3, 2007 | ||
| John Cornyn | Republican | Texas | December 2, 2002 | Incumbent | ||
| Lisa Murkowski | Republican | Alaska | December 20, 2002 | |||
| 108th | Frank Lautenberg[a] | Democratic | New Jersey | January 3, 2003 | June 3, 2013 | Former senator |
| Saxby Chambliss | Republican | Georgia | January 3, 2015 | Former representative (8 years); Georgia 10th in population (2000) | ||
| Lindsey Graham | Republican | South Carolina | Incumbent | Former representative (8 years); South Carolina 26th in population (2000) | ||
| John E. Sununu | Republican | New Hampshire | January 3, 2009 | Former representative (6 years) | ||
| Elizabeth Dole | Republican | North Carolina | Former cabinet secretary (6 years) | |||
| Lamar Alexander | Republican | Tennessee | January 3, 2021 | Former cabinet secretary (2 years) | ||
| Norm Coleman | Republican | Minnesota | January 3, 2009 | Minnesota 21st in population (2000) | ||
| Mark Pryor | Democratic | Arkansas | January 3, 2015 | Arkansas 33rd in population (2000) | ||
| 109th | Richard Burr | Republican | North Carolina | January 3, 2005 | January 3, 2023 | Former representative (10 years) |
| Jim DeMint | Republican | South Carolina | January 2, 2013 | Former representative (6 years); South Carolina 26th in population (2000) | ||
| Tom Coburn | Republican | Oklahoma | January 3, 2015 | Former representative (6 years); Oklahoma 27th in population (2000) | ||
| John Thune | Republican | South Dakota | Incumbent | Former representative (6 years); South Dakota 46th in population (2000) | ||
| Johnny Isakson | Republican | Georgia | December 31, 2019 | Former representative (5 years, 10 months) | ||
| David Vitter | Republican | Louisiana | January 3, 2017 | Former representative (5 years, 7 months) | ||
| Mel Martínez | Republican | Florida | September 9, 2009 | Former cabinet secretary | ||
| Barack Obama | Democratic | Illinois | November 16, 2008 | Illinois 5th in population (2000) | ||
| Ken Salazar | Democratic | Colorado | January 20, 2009 | Colorado 24th in population (2000) | ||
| Bob Menendez | Democratic | New Jersey | January 17, 2006 | Incumbent | ||
| 110th | Ben Cardin | Democratic | Maryland | January 3, 2007 | Former representative (20 years) | |
| Bernie Sanders | Independent | Vermont | Former representative (16 years) | |||
| Sherrod Brown | Democratic | Ohio | Former representative (14 years) | |||
| Bob Casey Jr. | Democratic | Pennsylvania | Pennsylvania 6th in population (2000) | |||
| Jim Webb | Democratic | Virginia | January 3, 2013 | Virginia 12th in population (2000) | ||
| Bob Corker | Republican | Tennessee | January 3, 2019 | Tennessee 16th in population (2000) | ||
| Claire McCaskill | Democratic | Missouri | Missouri 17th in population (2000) | |||
| Amy Klobuchar | Democratic | Minnesota | Incumbent | Minnesota 21st in population (2000) | ||
| Sheldon Whitehouse | Democratic | Rhode Island | Rhode Island 43rd in population (2000) | |||
| Jon Tester | Democratic | Montana | Montana 44th in population (2000) | |||
| John Barrasso | Republican | Wyoming | June 25, 2007 | |||
| Roger Wicker | Republican | Mississippi | December 31, 2007 | |||
| 111th | Mark Udall | Democratic | Colorado | January 3, 2009 | January 3, 2015 | Former representative (10 years); Colorado 24th in population (2000) |
| Tom Udall | Democratic | New Mexico | January 3, 2021 | Former representative (10 years); New Mexico 36th in population (2000) | ||
| Mike Johanns | Republican | Nebraska | January 3, 2015 | Former cabinet secretary | ||
| Jeanne Shaheen | Democratic | New Hampshire | Incumbent | Former governor (6 years) | ||
| Mark Warner | Democratic | Virginia | Former governor (4 years) | |||
| Jim Risch | Republican | Idaho | Former governor (7 months) | |||
| Kay Hagan | Democratic | North Carolina | January 3, 2015 | North Carolina 11th in population (2000) | ||
| Jeff Merkley | Democratic | Oregon | Incumbent | Oregon 28th in population (2000) | ||
| Mark Begich | Democratic | Alaska | January 3, 2015 | Alaska 48th in population (2000) | ||
| Roland Burris | Democratic | Illinois | January 15, 2009 | November 29, 2010 | ||
| Ted Kaufman | Democratic | Delaware | January 16, 2009 | November 15, 2010 | ||
| Michael Bennet | Democratic | Colorado | January 21, 2009 | Incumbent | ||
| Kirsten Gillibrand | Democratic | New York | January 26, 2009 | |||
| Al Franken | Democratic | Minnesota | July 7, 2009 | January 2, 2018 | ||
| George LeMieux | Republican | Florida | September 9, 2009 | January 3, 2011 | ||
| Paul G. Kirk | Democratic | Massachusetts | September 24, 2009 | February 4, 2010 | ||
| Scott Brown | Republican | Massachusetts | February 4, 2010 | January 3, 2013 | ||
| Carte Goodwin | Democratic | West Virginia | July 16, 2010 | November 15, 2010 | ||
| Joe Manchin | Democratic | West Virginia | November 15, 2010 | Incumbent | Former governor | |
| Chris Coons | Democratic | Delaware | ||||
| Mark Kirk | Republican | Illinois | November 29, 2010 | January 3, 2017 | ||
| 112th | Dan Coats[a] | Republican | Indiana | January 3, 2011 | January 3, 2017 | Former senator |
| Roy Blunt | Republican | Missouri | January 3, 2023 | Former representative (14 years); Missouri 17th in population (2000) | ||
| Jerry Moran | Republican | Kansas | Incumbent | Former representative (14 years); Kansas 32nd in population (2000) | ||
| Rob Portman | Republican | Ohio | January 3, 2023 | Former representative (12 years) | ||
| John Boozman | Republican | Arkansas | Incumbent | Former representative (9 years) | ||
| Pat Toomey | Republican | Pennsylvania | January 3, 2023 | Former representative (6 years) | ||
| John Hoeven | Republican | North Dakota | Incumbent | Former governor | ||
| Marco Rubio | Republican | Florida | Florida 4th in population (2000) | |||
| Ron Johnson | Republican | Wisconsin | Wisconsin 18th in population (2000) | |||
| Rand Paul | Republican | Kentucky | Kentucky 25th in population (2000) | |||
| Richard Blumenthal | Democratic | Connecticut | Connecticut 29th in population (2000) | |||
| Mike Lee | Republican | Utah | Utah 34th in population (2000) | |||
| Kelly Ayotte | Republican | New Hampshire | January 3, 2017 | New Hampshire 41st in population (2000) | ||
| Dean Heller | Republican | Nevada | May 9, 2011 | January 3, 2019 | ||
| Brian Schatz | Democratic | Hawaii | December 26, 2012 | Incumbent | ||
| Tim Scott | Republican | South Carolina | January 2, 2013 | |||
| 113th | Tammy Baldwin | Democratic | Wisconsin | January 3, 2013 | Former representative (14 years) | |
| Jeff Flake | Republican | Arizona | January 3, 2019 | Former representative (12 years) | ||
| Joe Donnelly | Democratic | Indiana | Former representative (6 years); Indiana 15th in population (2010) | |||
| Chris Murphy | Democratic | Connecticut | Incumbent | Former representative (6 years); Connecticut 29th in population (2010) | ||
| Mazie Hirono | Democratic | Hawaii | Former representative (6 years); Hawaii 40th in population (2010) | |||
| Martin Heinrich | Democratic | New Mexico | Former representative (4 years) | |||
| Angus King | Independent | Maine | Former governor (8 years) | |||
| Tim Kaine | Democratic | Virginia | Former governor (4 years) | |||
| Ted Cruz | Republican | Texas | Texas 2nd in population (2010) | |||
| Elizabeth Warren | Democratic | Massachusetts | Massachusetts 14th in population (2010) | |||
| Deb Fischer | Republican | Nebraska | Nebraska 38th in population (2010) | |||
| Heidi Heitkamp | Democratic | North Dakota | January 3, 2019 | North Dakota 48th in population (2010) | ||
| Mo Cowan | Democratic | Massachusetts | February 1, 2013 | July 16, 2013 | ||
| Jeffrey Chiesa | Republican | New Jersey | June 10, 2013 | October 31, 2013 | ||
| Ed Markey | Democratic | Massachusetts | July 16, 2013 | Incumbent | ||
| Cory Booker | Democratic | New Jersey | October 31, 2013 | |||
| John Walsh | Democratic | Montana | February 9, 2014 | January 3, 2015 | ||
| 114th | Shelley Moore Capito | Republican | West Virginia | January 3, 2015 | Incumbent | Former representative (14 years) |
| Gary Peters | Democratic | Michigan | Former representative (6 years); Michigan 8th in population (2010) | |||
| Bill Cassidy | Republican | Louisiana | Former representative (6 years); Louisiana 25th in population (2010) | |||
| Cory Gardner | Republican | Colorado | January 3, 2021 | Former representative (4 years); Colorado 22nd in population (2010) | ||
| James Lankford | Republican | Oklahoma | Incumbent | Former representative (4 years); Oklahoma 28th in population (2010) | ||
| Tom Cotton | Republican | Arkansas | Former representative (2 years); Arkansas 32nd in population (2010) | |||
| Steve Daines | Republican | Montana | Former representative (2 years); Montana 44th in population (2010) | |||
| Mike Rounds | Republican | South Dakota | Former governor | |||
| David Perdue | Republican | Georgia | January 3, 2021 | Georgia 9th in population (2010) | ||
| Thom Tillis | Republican | North Carolina | Incumbent | North Carolina 10th in population (2010) | ||
| Joni Ernst | Republican | Iowa | Iowa 30th in population (2010) | |||
| Ben Sasse | Republican | Nebraska | January 8, 2023 | Nebraska 38th in population (2010) | ||
| Dan Sullivan | Republican | Alaska | Incumbent | Alaska 47th in population (2010) | ||
| 115th | Chris Van Hollen | Democratic | Maryland | January 3, 2017 | Former representative (14 years) | |
| Todd Young | Republican | Indiana | Former representative (6 years) | |||
| Tammy Duckworth | Democratic | Illinois | Former representative (4 years) | |||
| Maggie Hassan | Democratic | New Hampshire | Former governor | |||
| Kamala Harris | Democratic | California | January 18, 2021 | California 1st in population (2010) | ||
| John Kennedy | Republican | Louisiana | Incumbent | Louisiana 25th in population (2010) | ||
| Catherine Cortez Masto | Democratic | Nevada | Nevada 35th in population (2010) | |||
| Luther Strange | Republican | Alabama | February 9, 2017 | January 3, 2018 | ||
| Tina Smith | Democratic | Minnesota | January 3, 2018 | Incumbent | Minnesota 21st in population (2010) | |
| Doug Jones | Democratic | Alabama | January 3, 2021 | Alabama 23rd in population (2010) | ||
| Cindy Hyde-Smith | Republican | Mississippi | April 9, 2018 | Incumbent | ||
| Jon Kyl[a] | Republican | Arizona | September 5, 2018 | December 31, 2018 | ||
| 116th | Marsha Blackburn | Republican | Tennessee | January 3, 2019 | Incumbent | Former representative (16 years) |
| Kyrsten Sinema | Democratic[h] | Arizona | Former representative (6 years); Arizona 16th in population (2010) | |||
| Kevin Cramer | Republican | North Dakota | Former representative (6 years); North Dakota 48th in population (2010) | |||
| Martha McSally | Republican | Arizona | December 2, 2020 | Former representative (4 years) | ||
| Jacky Rosen | Democratic | Nevada | Incumbent | Former representative (2 years) | ||
| Mitt Romney | Republican | Utah | Former governor | |||
| Mike Braun | Republican | Indiana | Indiana 15th in population (2010) | |||
| Josh Hawley | Republican | Missouri | Missouri 18th in population (2010) | |||
| Rick Scott | Republican | Florida | January 8, 2019 | |||
| Kelly Loeffler | Republican | Georgia | January 6, 2020 | January 20, 2021 | ||
| Mark Kelly | Democratic | Arizona | December 2, 2020 | Incumbent | ||
| 117th | Ben Ray Luján | Democratic | New Mexico | January 3, 2021 | Former representative (12 years) | |
| Cynthia Lummis | Republican | Wyoming | Former representative (8 years) | |||
| Roger Marshall | Republican | Kansas | Former representative (4 years) | |||
| John Hickenlooper | Democratic | Colorado | Former governor | |||
| Bill Hagerty | Republican | Tennessee | Tennessee 17th in population (2010) | |||
| Tommy Tuberville | Republican | Alabama | Alabama 23rd in population (2010) | |||
| Alex Padilla | Democratic | California | January 20, 2021 | California 1st in population (2010) | ||
| Jon Ossoff | Democratic | Georgia | Georgia 9th in population (2010); 'O' 15th letter in the alphabet | |||
| Raphael Warnock | Democratic | Georgia | Georgia 9th in population (2010); 'W' 23rd letter in the alphabet | |||
| 118th | Peter Welch | Democratic | Vermont | January 3, 2023 | Former representative (16 years) | |
| Markwayne Mullin | Republican | Oklahoma | Former representative (10 years) | |||
| Ted Budd | Republican | North Carolina | Former representative (6 years) | |||
| John Fetterman | Democratic | Pennsylvania | Pennsylvania 5th in population (2020) | |||
| J. D. Vance | Republican | Ohio | Ohio 7th in population (2020) | |||
| Eric Schmitt | Republican | Missouri | Missouri 19th in population (2020) | |||
| Katie Britt | Republican | Alabama | Alabama 24th in population (2020) | |||
| Pete Ricketts | Republican | Nebraska | January 23, 2023 |
- ^ a b c d e f g h i j k l Served non-consecutive terms.
- ^ Thurmond joined the Republican Party in 1964.
- ^ Specter joined the Democratic Party in 2009.
- ^ Shelby joined the Republican Party in 1994.
- ^ Jeffords became and independent in 2001.
- ^ Lieberman became an independent in 2006.
- ^ Campbell joined the Republican Party in 1995.
- ^ Sinema became an independent in 2022.