# List of United States senators in the 113th Congress

This is a complete list of members of the United States Senate during the 113th United States Congress listed by seniority, from January 3, 2013, to January 3, 2015. It is a historical listing and will contain people who have not served the entire two-year Congress should anyone resign, die, or be expelled.
Order of service is based on the commencement of the senator's first term. Behind this is former service as a senator (only giving the senator seniority within his or her new incoming class), service as vice president, a House member, a cabinet secretary, or a governor of a state. The final factor is the population of the senator's state.
Senators who were sworn in during the middle of the two-year Congress (up until the last senator who was not sworn in early after winning the November 2014 election) are listed at the end of the list with no number.
In this Congress, Tom Harkin (D-Iowa) was the most senior junior senator. Brian Schatz (Hawaii) was the most junior senior senator until February 1, 2013, when John Kerry's resignation to become Secretary of State made freshwoman Elizabeth Warren (D-Massachusetts) the most junior senior Senator.
The 113th Congress was the first Congress since the 103rd Congress (1993–95) without a senator who had served for at least 40 years. The most senior senator, Patrick Leahy, did not reach the 40-year mark until January 3, 2015. From November 7, 1996, when Strom Thurmond reached the 40-year mark during the 104th Congress, until Daniel Inouye died on December 17, 2012, there was always at least one senator who had served for 40 years.
In the 113th Congress, 17 states (Nevada, Alaska, New Hampshire, Maine, Florida, North Carolina, North Dakota, South Dakota, Wisconsin, Iowa, Illinois, Indiana, Ohio, Pennsylvania, Missouri, Arkansas, Louisiana) had split delegations (1 senator caucusing with Democrats & 1 caucusing with Republicans). Maine had a Republican up for re-election in 2014 & a Democrat up in 2018. Nevada had a Democrat up in 2016 & a Republican up in 2018. All 15 other states with split delegations had a Republican up in 2016 and a Democrat up in either 2014 or 2018. This is a stark difference from the 118th Congress, which has only 5 split Senate delegations.

## Terms of service

| Class | Terms of service of senators that expired in years |
| Class 2 | Terms of service of senators that expired in 2015 (AK, AL, AR, CO, DE, GA, IA, ID, IL, KS, KY, LA, MA, ME, MI, MN, MS, MT, NC, NE, NH, NJ, NM, OK, OR, RI, SC, SD, TN, TX, VA, WV, and WY.) |
| Class 3 | Terms of service of senators that expired in 2017 (AK, AL, AR, AZ, CA, CO, CT, FL, GA, HI, IA, ID, IL, IN, KS, KY, LA, MD, MO, NC, ND, NH, NV, NY, OH, OK, OR, PA, SC, SD, UT, VT, WA, and WI.) |
| Class 1 | Terms of service of senators that expired in 2019 (AZ, CA, CT, DE, FL, HI, IN, MA, MD, ME, MI, MN, MO, MS, MT, ND, NE, NJ, NM, NV, NY, OH, PA, RI, TN, TX, UT, VA, VT, WA, WI, WV, and WY.) |

## U.S. Senate seniority list

U.S. Senate seniority :
| Current rank | Historical rank | Senator (party-state) | Seniority date | Other factors |
| 1 | 1692 | Patrick Leahy (D-VT) | January 3, 1975 | |
| 2 | 1708 | Orrin Hatch (R-UT) | January 3, 1977 | |
| 3 | 1717 | Max Baucus (D-MT) | December 15, 1978 | |
| 4 | 1719 | Thad Cochran (R-MS) | December 27, 1978 | |
| 5 | 1730 | Carl Levin (D-MI) | January 3, 1979 | |
| 6 | 1743 | Chuck Grassley (R-IA) | January 3, 1981 | |
| 7 | 1761 | John Kerry (D-MA) | January 2, 1985 | |
| 8 | 1763 | Tom Harkin (D-IA) | January 3, 1985 | Former member of the U.S. House of Representatives |
| 9 | 1766 | Mitch McConnell (R-KY) | January 3, 1985 | |
| 10 | 1767 | Jay Rockefeller (D-WV) | January 15, 1985 | |
| 11 | 1773 | Barbara Mikulski (D-MD) | January 3, 1987 | Former member of the U.S. House of Representatives (10 years) |
| 12 | 1775 | Richard Shelby (R-AL) | January 3, 1987 | Former member of the U.S. House of Representatives (8 years) |
| 13 | 1777 | John McCain (R-AZ) | January 3, 1987 | Former member of the U.S. House of Representatives (4 years); Arizona 29th in population (1980) |
| 14 | 1778 | Harry Reid (D-NV) | January 3, 1987 | Former member of the U.S. House of Representatives (4 years); Nevada 43rd in population (1980) |
| 15 | 1801 | Dianne Feinstein (D-CA) | November 10, 1992 | |
| 16 | 1804 | Barbara Boxer (D-CA) | January 3, 1993 | Former member of the U.S. House of Representatives |
| 17 | 1812 | Patty Murray (D-WA) | January 3, 1993 | |
| 18 | 1816 | Jim Inhofe (R-OK) | November 17, 1994 | |
| 19 | 1827 | Ron Wyden (D-OR) | February 6, 1996 | |
| 20 | 1830 | Pat Roberts (R-KS) | January 3, 1997 | Former member of the U.S. House of Representatives (16 years) |
| 21 | 1831 | Dick Durbin (D-IL) | January 3, 1997 | Former member of the U.S. House of Representatives (14 years) |
| 22 | 1833 | Tim Johnson (D-SD) | January 3, 1997 | Former member of the U.S. House of Representatives (10 years) |
| 23 | 1835 | Jack Reed (D-RI) | January 3, 1997 | Former member of the U.S. House of Representatives (6 years) |
| 24 | 1838 | Mary Landrieu (D-LA) | January 3, 1997 | Louisiana 21st in population (1990) |
| 25 | 1839 | Jeff Sessions (R-AL) | January 3, 1997 | Alabama 22nd in population (1990) |
| 26 | 1842 | Susan Collins (R-ME) | January 3, 1997 | Maine 38th in population (1990) |
| 27 | 1843 | Mike Enzi (R-WY) | January 3, 1997 | Wyoming 50th in population (1990) |
| 28 | 1844 | Chuck Schumer (D-NY) | January 3, 1999 | Former member of the U.S. House of Representatives (18 years) |
| 29 | 1846 | Mike Crapo (R-ID) | January 3, 1999 | Former member of the U.S. House of Representatives (6 years) |
| 30 | 1854 | Bill Nelson (D-FL) | January 3, 2001 | Former member of the U.S. House of Representatives (12 years) |
| 31 | 1855 | Tom Carper (D-DE) | January 3, 2001 | Former member of the U.S. House of Representatives (10 years) |
| 32 | 1856 | Debbie Stabenow (D-MI) | January 3, 2001 | Former member of the U.S. House of Representatives (4 years) |
| 33 | 1859 | Maria Cantwell (D-WA) | January 3, 2001 | Former member of the U.S. House of Representatives (2 years) |
| 34 | 1867 | John Cornyn (R-TX) | December 2, 2002 | |
| 35 | 1868 | Lisa Murkowski (R-AK) | December 20, 2002 | |
| 36 | 1755 | Frank Lautenberg (D-NJ) | January 3, 2003 | Previously a senator |
| 37 | 1869 | Saxby Chambliss (R-GA) | January 3, 2003 | Former member of the U.S. House of Representatives (8 years); Georgia 10th in population (2000) |
| 38 | 1870 | Lindsey Graham (R-SC) | January 3, 2003 | Former member of the U.S. House of Representatives (8 years); South Carolina 26th in population (2000) |
| 39 | 1872 | Lamar Alexander (R-TN) | January 3, 2003 | Former cabinet member |
| 40 | 1875 | Mark Pryor (D-AR) | January 3, 2003 | |
| 41 | 1876 | Richard Burr (R-NC) | January 3, 2005 | Former member of the U.S. House of Representatives (10 years) |
| 42 | 1878 | Tom Coburn (R-OK) | January 3, 2005 | Former member of the U.S. House of Representatives (6 years); Oklahoma 27th in population (2000) |
| 43 | 1879 | John Thune (R-SD) | January 3, 2005 | Former member of the U.S. House of Representatives (6 years); South Dakota 46th in population (2000) |
| 44 | 1880 | Johnny Isakson (R-GA) | January 3, 2005 | Former member of the U.S. House of Representatives (5 years, 10 months) |
| 45 | 1881 | David Vitter (R-LA) | January 3, 2005 | Former member of the U.S. House of Representatives (5 years, 7 months) |
| 46 | 1885 | Bob Menendez (D-NJ) | January 17, 2006 | |
| 47 | 1886 | Ben Cardin (D-MD) | January 3, 2007 | Former member of the U.S. House of Representatives (20 years) |
| 48 | 1887 | Bernie Sanders (I-VT) | January 3, 2007 | Former member of the U.S. House of Representatives (16 years) |
| 49 | 1888 | Sherrod Brown (D-OH) | January 3, 2007 | Former member of the U.S. House of Representatives (14 years) |
| 50 | 1889 | Bob Casey, Jr. (D-PA) | January 3, 2007 | Pennsylvania 6th in population (2000) |
| 51 | 1891 | Bob Corker (R-TN) | January 3, 2007 | Tennessee 16th in population (2000) |
| 52 | 1892 | Claire McCaskill (D-MO) | January 3, 2007 | Missouri 17th in population (2000) |
| 53 | 1893 | Amy Klobuchar (D-MN) | January 3, 2007 | Minnesota 21st in population (2000) |
| 54 | 1894 | Sheldon Whitehouse (D-RI) | January 3, 2007 | Rhode Island 43rd in population (2000) |
| 55 | 1895 | Jon Tester (D-MT) | January 3, 2007 | Montana 44th in population (2000) |
| 56 | 1896 | John Barrasso (R-WY) | June 25, 2007 | |
| 57 | 1897 | Roger Wicker (R-MS) | December 31, 2007 | |
| 58 | 1898 | Mark Udall (D-CO) | January 3, 2009 | Former member of the U.S. House of Representatives (10 years); Colorado 24th in population (2000) |
| 59 | 1899 | Tom Udall (D-NM) | January 3, 2009 | Former member of the U.S. House of Representatives (10 years); New Mexico 36th in population (2000) |
| 60 | 1900 | Mike Johanns (R-NE) | January 3, 2009 | Former cabinet member |
| 61 | 1901 | Jeanne Shaheen (D-NH) | January 3, 2009 | Former governor (6 years) |
| 62 | 1902 | Mark Warner (D-VA) | January 3, 2009 | Former governor (4 years) |
| 63 | 1903 | Jim Risch (R-ID) | January 3, 2009 | Former governor (7 months) |
| 64 | 1904 | Kay Hagan (D-NC) | January 3, 2009 | North Carolina 11th in population (2000) |
| 65 | 1905 | Jeff Merkley (D-OR) | January 3, 2009 | Oregon 28th in population (2000) |
| 66 | 1906 | Mark Begich (D-AK) | January 3, 2009 | Alaska 48th in population (2000) |
| 67 | 1909 | Michael Bennet (D-CO) | January 21, 2009 | |
| 68 | 1910 | Kirsten Gillibrand (D-NY) | January 26, 2009 | |
| 69 | 1911 | Al Franken (D-MN) | July 7, 2009 | |
| 70 | 1916 | Joe Manchin (D-WV) | November 15, 2010 | Former governor |
| 71 | 1917 | Chris Coons (D-DE) | November 15, 2010 | |
| 72 | 1918 | Mark Kirk (R-IL) | November 29, 2010 | |
| 73 | 1785 | Dan Coats (R-IN) | January 3, 2011 | Previously a senator |
| 74 | 1919 | Roy Blunt (R-MO) | January 3, 2011 | Former member of the U.S. House of Representatives (14 years); Missouri 17th in population (2010) |
| 75 | 1920 | Jerry Moran (R-KS) | January 3, 2011 | Former member of the U.S. House of Representatives (14 years); Kansas 32nd in population (2010) |
| 76 | 1921 | Rob Portman (R-OH) | January 3, 2011 | Former member of the U.S. House of Representatives (12 years) |
| 77 | 1922 | John Boozman (R-AR) | January 3, 2011 | Former member of the U.S. House of Representatives (9 years) |
| 78 | 1923 | Pat Toomey (R-PA) | January 3, 2011 | Former member of the U.S. House of Representatives (6 years) |
| 79 | 1924 | John Hoeven (R-ND) | January 3, 2011 | Former governor |
| 80 | 1925 | Marco Rubio (R-FL) | January 3, 2011 | Florida 4th in population (2010) |
| 81 | 1926 | Ron Johnson (R-WI) | January 3, 2011 | Wisconsin 18th in population (2010) |
| 82 | 1927 | Rand Paul (R-KY) | January 3, 2011 | Kentucky 25th in population (2010) |
| 83 | 1928 | Richard Blumenthal (D-CT) | January 3, 2011 | Connecticut 29th in population (2010) |
| 84 | 1929 | Mike Lee (R-UT) | January 3, 2011 | Utah 34th in population (2010) |
| 85 | 1930 | Kelly Ayotte (R-NH) | January 3, 2011 | New Hampshire 41st in population (2010) |
| 86 | 1931 | Dean Heller (R-NV) | May 9, 2011 | |
| 87 | 1932 | Brian Schatz (D-HI) | December 27, 2012 | |
| 88 | 1933 | Tim Scott (R-SC) | January 2, 2013 | |
| 89 | 1934 | Tammy Baldwin (D-WI) | January 3, 2013 | Former member of the U.S. House of Representatives (14 years) |
| 90 | 1935 | Jeff Flake (R-AZ) | January 3, 2013 | Former member of the U.S. House of Representatives (12 years) |
| 91 | 1936 | Joe Donnelly (D-IN) | January 3, 2013 | Former member of the U.S. House of Representatives (6 years); Indiana 16th in population (2010) |
| 92 | 1937 | Chris Murphy (D-CT) | January 3, 2013 | Former member of the U.S. House of Representatives (6 years); Connecticut 29th in population (2010) |
| 93 | 1938 | Mazie Hirono (D-HI) | January 3, 2013 | Former member of the U.S. House of Representatives (6 years); Hawaii 42nd in population (2010) |
| 94 | 1939 | Martin Heinrich (D-NM) | January 3, 2013 | Former member of the U.S. House of Representatives (4 years) |
| 95 | 1940 | Angus King (I-ME) | January 3, 2013 | Former governor (8 years) |
| 96 | 1941 | Tim Kaine (D-VA) | January 3, 2013 | Former governor (4 years) |
| 97 | 1942 | Ted Cruz (R-TX) | January 3, 2013 | Texas 2nd in population (2010) |
| 98 | 1943 | Elizabeth Warren (D-MA) | January 3, 2013 | Massachusetts 15th in population (2010) |
| 99 | 1944 | Deb Fischer (R-NE) | January 3, 2013 | Nebraska 38th in population (2010) |
| 100 | 1945 | Heidi Heitkamp (D-ND) | January 3, 2013 | North Dakota 48th in population (2010) |
| | 1946 | Mo Cowan (D-MA) | February 1, 2013 | |
| | 1947 | Jeffrey Chiesa (R-NJ) | June 6, 2013 | |
| | 1948 | Ed Markey (D-MA) | July 16, 2013 | |
| | 1949 | Cory Booker (D-NJ) | October 31, 2013 | |
| | 1950 | John Walsh (D-MT) | February 9, 2014 | |
The most senior senators by class were Orrin Hatch (R-Utah) from Class 1, Max Baucus (D-Montana) from Class 2, and Patrick Leahy (D-Vermont) from Class 3. Baucus resigned on February 6, 2014 with Thad Cochran (R-Mississippi) became the senior senator from his class.