Party | Seats Won | Seats Not Up | Total Seats | |
Democratic | 12 | 32 | 44 | |
Republican | 24 | 30 | 54 | |
Independent | 0 | 2 | 2 |
State | Name | Party | Elect 2014 | First Year | Term Expires |
Alabama | Jefferson B. Sessions, III | Republican | • | 1997 | 2021 |
Alabama | Richard C. Shelby | Republican | 1987 | 2017 | |
Alaska | Daniel 'Dan' Sullivan | Republican | • | 2015 | 2021 |
Alaska | Lisa Murkowski | Republican | 2002 | 2017 | |
Arizona | Jeffrey L. Flake | Republican | 2013 | 2019 | |
Arizona | John S. McCain, III | Republican | 1987 | 2017 | |
Arkansas | Thomas 'Tom' Cotton | Republican | • | 2015 | 2021 |
Arkansas | John Boozman | Republican | 2011 | 2017 | |
California | Dianne G. B. Feinstein | Democratic | 1992 | 2019 | |
California | Barbara L. Boxer | Democratic | 1993 | 2017 | |
Colorado | Cory Gardner | Republican | • | 2015 | 2021 |
Colorado | Michael Bennet | Democratic | 2009 | 2017 | |
Connecticut | Christopher S. Murphy | Democratic | 2013 | 2019 | |
Connecticut | Richard Blumenthal | Democratic | 2011 | 2017 | |
Delaware | Thomas R. Carper | Democratic | 2001 | 2019 | |
Delaware | Christopher Coons | Democratic | • | 2010 | 2021 |
Florida | C. William Nelson | Democratic | 2001 | 2019 | |
Florida | Marco Rubio | Republican | 2011 | 2017 | |
Georgia | David Perdue | Republican | • | 2015 | 2021 |
Georgia | John Isakson | Republican | 2005 | 2017 | |
Hawaii | Mazie Hirono | Democratic | 2013 | 2019 | |
Hawaii | Brian Schatz 1 | Democratic | • | 2012 | 2017 |
Idaho | James E. Risch | Republican | • | 2009 | 2021 |
Idaho | Michael D. Crapo | Republican | 1999 | 2017 | |
Illinois | Richard J. Durbin | Democratic | • | 1997 | 2021 |
Illinois | Mark S. Kirk | Republican | 2010 | 2017 | |
Indiana | Joseph S. Donnelly, Sr | Democratic | 2013 | 2019 | |
Indiana | Daniel R. Coats | Republican | 2011 | 2017 | |
Iowa | Joni Ernst | Republican | • | 2015 | 2021 |
Iowa | Charles E. Grassley | Republican | 1981 | 2017 | |
Kansas | C. Patrick Roberts | Republican | • | 1997 | 2021 |
Kansas | Jerry Moran | Republican | 2011 | 2017 | |
Kentucky | A. Mitchell McConnell, Jr. | Republican | • | 1985 | 2021 |
Kentucky | Rand Paul | Republican | 2011 | 2017 | |
Louisiana | William 'Bill' Cassidy | Republican | • | 2015 | 2021 |
Louisiana | David Vitter | Republican | 2005 | 2017 | |
Maine | Angus S. King, Jr. | Independent | 2013 | 2019 | |
Maine | Susan M. Collins | Republican | • | 1997 | 2021 |
Maryland | Benjamin L. Cardin | Democratic | 2007 | 2019 | |
Maryland | Barbara A. Mikulski | Democratic | 1987 | 2017 | |
Massachusetts | Elizabeth Warren | Democratic | 2013 | 2019 | |
Massachusetts | Edward 'Ed' Markey | Democratic | • | 2013 | 2021 |
Michigan | Debbie A. Stabenow | Democratic | 2001 | 2019 | |
Michigan | Gary Peters | Democratic | • | 2015 | 2021 |
Minnesota | Amy Klobuchar | Democratic | 2007 | 2019 | |
Minnesota | Alan S. Franken | Democratic | • | 2009 | 2021 |
Mississippi | Roger F. Wicker | Republican | 2007 | 2019 | |
Mississippi | W. Thad Cochran | Republican | • | 1979 | 2021 |
Missouri | Claire McCaskill | Democratic | 2007 | 2019 | |
Missouri | Roy Blunt | Republican | 2011 | 2017 | |
Montana | Jon Tester | Democratic | 2007 | 2019 | |
Montana | Steven 'Steve' Daines | Republican | • | 2015 | 2021 |
Nebraska | Debra S. Fischer | Republican | 2013 | 2019 | |
Nebraska | Benjamin 'Ben' Sasse | Republican | • | 2015 | 2021 |
Nevada | Dean A. Heller | Republican | 2011 | 2019 | |
Nevada | Harry M. Reid | Democratic | 1987 | 2017 | |
New Hampshire | Jeanne Shaheen | Democratic | • | 2009 | 2021 |
New Hampshire | Kelly Ayotte | Republican | 2011 | 2017 | |
New Jersey | Robert Menendez | Democratic | 2006 | 2019 | |
New Jersey | Cory Booker | Democratic | • | 2013 | 2021 |
New Mexico | Martin T. Heinrich | Democratic | 2013 | 2019 | |
New Mexico | Thomas S. Udall | Democratic | • | 2009 | 2021 |
New York | Kirsten Gillibrand | Democratic | 2009 | 2019 | |
New York | Charles E. Schumer | Democratic | 1999 | 2017 | |
North Carolina | Thomas Roland Tillis | Republican | • | 2015 | 2021 |
North Carolina | Richard M. Burr | Republican | 2005 | 2017 | |
North Dakota | Mary K. 'Heidi' Heitkamp | Democratic | 2013 | 2019 | |
North Dakota | John Hoeven | Republican | 2011 | 2017 | |
Ohio | Sherrod Brown | Democratic | 2007 | 2019 | |
Ohio | Rob Portman | Republican | 2011 | 2017 | |
Oklahoma | James Inhofe | Republican | • | 1994 | 2021 |
Oklahoma | James Lankford | Republican | • | 2015 | 2017 |
Oregon | Jeffrey A. Merkley | Democratic | • | 2009 | 2021 |
Oregon | Ronald L. Wyden | Democratic | 1996 | 2017 | |
Pennsylvania | Robert Casey, Jr. | Democratic | 2007 | 2019 | |
Pennsylvania | Pat Toomey | Republican | 2011 | 2017 | |
Rhode Island | Sheldon Whitehouse | Democratic | 2007 | 2019 | |
Rhode Island | John F. Reed | Democratic | • | 1997 | 2021 |
South Carolina | Lindsey O. Graham | Republican | • | 2003 | 2021 |
South Carolina | Timothy E. Scott 2 | Republican | • | 2013 | 2017 |
South Dakota | Marion Michael 'Mike' Rounds | Republican | • | 2015 | 2021 |
South Dakota | John R. Thune | Republican | 2005 | 2017 | |
Tennessee | Robert P. 'Bob' Corker, Jr. | Republican | 2007 | 2019 | |
Tennessee | Lamar A. Alexander | Republican | • | 2003 | 2021 |
Texas | Rafael E. 'Ted' Cruz | Republican | 2013 | 2019 | |
Texas | John Cornyn | Republican | • | 2002 | 2021 |
Utah | Orrin G. Hatch | Republican | 1977 | 2019 | |
Utah | Mike Lee | Republican | 2011 | 2017 | |
Vermont | Bernard Sanders | Independent | 2007 | 2019 | |
Vermont | Patrick J. Leahy | Democratic | 1975 | 2017 | |
Virginia | Timothy M. Kaine | Democratic | 2013 | 2019 | |
Virginia | Mark Warner | Democratic | • | 2009 | 2021 |
Washington | Maria Cantwell | Democratic | 2001 | 2019 | |
Washington | Patricia Murray | Democratic | 1993 | 2017 | |
West Virginia | Joe Manchin, III | Democratic | 2010 | 2019 | |
West Virginia | Shelley Moore Capito | Republican | • | 2015 | 2021 |
Wisconsin | Tammy Baldwin | Democratic | 2013 | 2019 | |
Wisconsin | Ron Johnson | Republican | 2011 | 2017 | |
Wyoming | John A. Barrasso | Republican | 2007 | 2019 | |
Wyoming | Michael B. Enzi | Republican | • | 1997 | 2021 |
Notes: 1: Special Election to serve the remainder of Sen. Daniel K. Inouye's term (Sen. Inouye died on December 17, 2012) 2: Special Election (was appointed in 2012 after Jim DeMint, Jr. resigned). |