# List of United States senators in the 112th Congress

This is a complete list of members of the United States Senate during the 112th United States Congress listed by seniority from January 3, 2011, to January 3, 2013. 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 2012 election) are listed at the end of the list with no number.
In the 112th Congress, Tom Harkin is the most senior junior senator, and Jeanne Shaheen is the most junior senior senator.

## Terms of service

| Class | Terms of service of senators that expired in years |
| Class 1 | Terms of service of senators that expired in 2013 (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.) |
| 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.) |

## U.S. Senate seniority list

U.S. Senate seniority :
| Rank | Historical rank | Senator (party-state) | Seniority date | Other factors |
| 1 | 1614 | Daniel Inouye (D-HI) | January 3, 1963 | |
| 2 | 1692 | Patrick Leahy (D-VT) | January 3, 1975 | |
| 3 | 1705 | Richard Lugar (R-IN) | January 3, 1977 | Indiana 11th in population (1970) |
| 4 | 1708 | Orrin Hatch (R-UT) | January 3, 1977 | Utah 36th in population (1970) |
| 5 | 1717 | Max Baucus (D-MT) | December 15, 1978 | |
| 6 | 1719 | Thad Cochran (R-MS) | December 27, 1978 | |
| 7 | 1730 | Carl Levin (D-MI) | January 3, 1979 | |
| 8 | 1743 | Chuck Grassley (R-IA) | January 3, 1981 | |
| 9 | 1758 | Jeff Bingaman (D-NM) | January 3, 1983 | |
| 10 | 1761 | John Kerry (D-MA) | January 2, 1985 | |
| 11 | 1763 | Tom Harkin (D-IA) | January 3, 1985 | Former member of the U.S. House of Representatives |
| 12 | 1766 | Mitch McConnell (R-KY) | January 3, 1985 | |
| 13 | 1767 | Jay Rockefeller (D-WV) | January 15, 1985 | |
| 14 | 1773 | Barbara Mikulski (D-MD) | January 3, 1987 | Former member of the U.S. House of Representatives (10 years) |
| 15 | 1775 | Richard Shelby (R-AL) | January 3, 1987 | Former member of the U.S. House of Representatives (8 years) |
| 16 | 1777 | John McCain (R-AZ) | January 3, 1987 | Former member of the U.S. House of Representatives (4 years); Arizona 29th in population (1980) |
| 17 | 1778 | Harry Reid (D-NV) | January 3, 1987 | Former member of the U.S. House of Representatives (4 years); Nevada 43rd in population (1980) |
| 18 | 1781 | Kent Conrad (D-ND) | January 3, 1987 | |
| 19 | 1790 | Herb Kohl (D-WI) | January 3, 1989 | Wisconsin 16th in population (1980) |
| 20 | 1791 | Joe Lieberman (ID-CT) | January 3, 1989 | Connecticut 25th in population (1980) |
| 21 | 1793 | Daniel Akaka (D-HI) | May 16, 1990 | |
| 22 | 1801 | Dianne Feinstein (D-CA) | November 10, 1992 | |
| 23 | 1804 | Barbara Boxer (D-CA) | January 3, 1993 | Former member of the U.S. House of Representatives |
| 24 | 1812 | Patty Murray (D-WA) | January 3, 1993 | |
| 25 | 1815 | Kay Bailey Hutchison (R-TX) | June 14, 1993 | |
| 26 | 1816 | Jim Inhofe (R-OK) | November 17, 1994 | |
| 27 | 1818 | Olympia Snowe (R-ME) | January 3, 1995 | Former member of the U.S. House of Representatives (16 years) |
| 28 | 1819 | Jon Kyl (R-AZ) | January 3, 1995 | Former member of the U.S. House of Representatives (8 years) |
| 29 | 1827 | Ron Wyden (D-OR) | February 6, 1996 | |
| 30 | 1830 | Pat Roberts (R-KS) | January 3, 1997 | Former member of the U.S. House of Representatives (16 years) |
| 31 | 1831 | Dick Durbin (D-IL) | January 3, 1997 | Former member of the U.S. House of Representatives (14 years) |
| 32 | 1833 | Tim Johnson (D-SD) | January 3, 1997 | Former member of the U.S. House of Representatives (10 years) |
| 33 | 1835 | Jack Reed (D-RI) | January 3, 1997 | Former member of the U.S. House of Representatives (6 years) |
| 34 | 1838 | Mary Landrieu (D-LA) | January 3, 1997 | Louisiana 21st in population (1990) |
| 35 | 1839 | Jeff Sessions (R-AL) | January 3, 1997 | Alabama 22nd in population (1990) |
| 36 | 1842 | Susan Collins (R-ME) | January 3, 1997 | Maine 38th in population (1990) |
| 37 | 1843 | Mike Enzi (R-WY) | January 3, 1997 | Wyoming 50th in population (1990) |
| 38 | 1844 | Chuck Schumer (D-NY) | January 3, 1999 | Former member of the U.S. House of Representatives (18 years) |
| 39 | 1846 | Mike Crapo (R-ID) | January 3, 1999 | Former member of the U.S. House of Representatives (6 years) |
| 40 | 1854 | Bill Nelson (D-FL) | January 3, 2001 | Former member of the U.S. House of Representatives (12 years) |
| 41 | 1855 | Tom Carper (D-DE) | January 3, 2001 | Former member of the U.S. House of Representatives (10 years) |
| 42 | 1856 | Debbie Stabenow (D-MI) | January 3, 2001 | Former member of the U.S. House of Representatives (4 years); Michigan 8th in population (1990) |
| 43 | 1857 | John Ensign (R-NV) | January 3, 2001 | Former member of the U.S. House of Representatives (4 years); Nevada 39th in population (1990) |
| 44 | 1859 | Maria Cantwell (D-WA) | January 3, 2001 | Former member of the U.S. House of Representatives (2 years) |
| 45 | 1860 | Ben Nelson (D-NE) | January 3, 2001 | |
| 46 | 1867 | John Cornyn (R-TX) | December 2, 2002 | |
| 47 | 1868 | Lisa Murkowski (R-AK) | December 20, 2002 | |
| 48 | 1755 | Frank Lautenberg (D-NJ) | January 3, 2003 | Former senator |
| 49 | 1869 | Saxby Chambliss (R-GA) | January 3, 2003 | Former member of the U.S. House of Representatives (8 years); Georgia 10th in population (2000) |
| 50 | 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) |
| 51 | 1872 | Lamar Alexander (R-TN) | January 3, 2003 | Former cabinet member |
| 52 | 1875 | Mark Pryor (D-AR) | January 3, 2003 | Arkansas 33rd in population (2000) |
| 53 | 1876 | Richard Burr (R-NC) | January 3, 2005 | Former member of the U.S. House of Representatives (10 years) |
| 54 | 1877 | Jim DeMint (R-SC) | January 3, 2005 | Former member of the U.S. House of Representatives (6 years); South Carolina 26th in population (2000) |
| 55 | 1878 | Tom Coburn (R-OK) | January 3, 2005 | Former member of the U.S. House of Representatives (6 years); Oklahoma 27th in population (2000) |
| 56 | 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) |
| 57 | 1880 | Johnny Isakson (R-GA) | January 3, 2005 | Former member of the U.S. House of Representatives (5 years, 10 months) |
| 58 | 1881 | David Vitter (R-LA) | January 3, 2005 | Former member of the U.S. House of Representatives (5 years, 7 months) |
| 59 | 1885 | Bob Menendez (D-NJ) | January 17, 2006 | |
| 60 | 1886 | Ben Cardin (D-MD) | January 3, 2007 | Former member of the U.S. House of Representatives (20 years) |
| 61 | 1887 | Bernie Sanders (I-VT) | January 3, 2007 | Former member of the U.S. House of Representatives (16 years) |
| 62 | 1888 | Sherrod Brown (D-OH) | January 3, 2007 | Former member of the U.S. House of Representatives (14 years) |
| 63 | 1889 | Bob Casey, Jr. (D-PA) | January 3, 2007 | Pennsylvania 6th in population (2000) |
| 64 | 1890 | Jim Webb (D-VA) | January 3, 2007 | Virginia 12th in population (2000) |
| 65 | 1891 | Bob Corker (R-TN) | January 3, 2007 | Tennessee 16th in population (2000) |
| 66 | 1892 | Claire McCaskill (D-MO) | January 3, 2007 | Missouri 17th in population (2000) |
| 67 | 1893 | Amy Klobuchar (D-MN) | January 3, 2007 | Minnesota 21st in population (2000) |
| 68 | 1894 | Sheldon Whitehouse (D-RI) | January 3, 2007 | Rhode Island 43rd in population (2000) |
| 69 | 1895 | Jon Tester (D-MT) | January 3, 2007 | Montana 44th in population (2000) |
| 70 | 1896 | John Barrasso (R-WY) | June 25, 2007 | |
| 71 | 1897 | Roger Wicker (R-MS) | December 31, 2007 | |
| 72 | 1898 | Mark Udall (D-CO) | January 3, 2009 | Former member of the U.S. House of Representatives (10 years); Colorado 24th in population (2000) |
| 73 | 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) |
| 74 | 1900 | Mike Johanns (R-NE) | January 3, 2009 | Former cabinet member |
| 75 | 1901 | Jeanne Shaheen (D-NH) | January 3, 2009 | Former governor (6 years) |
| 76 | 1902 | Mark Warner (D-VA) | January 3, 2009 | Former governor (4 years) |
| 77 | 1903 | Jim Risch (R-ID) | January 3, 2009 | Former governor (7 months) |
| 78 | 1904 | Kay Hagan (D-NC) | January 3, 2009 | North Carolina 11th in population (2000) |
| 79 | 1905 | Jeff Merkley (D-OR) | January 3, 2009 | Oregon 28th in population (2000) |
| 80 | 1906 | Mark Begich (D-AK) | January 3, 2009 | Alaska 48th in population (2000) |
| 81 | 1909 | Michael Bennet (D-CO) | January 21, 2009 | |
| 82 | 1910 | Kirsten Gillibrand (D-NY) | January 26, 2009 | |
| 83 | 1911 | Al Franken (D-MN) | July 7, 2009 | |
| 84 | 1914 | Scott Brown (R-MA) | February 4, 2010 | |
| 85 | 1916 | Joe Manchin (D-WV) | November 15, 2010 | Former governor |
| 86 | 1917 | Chris Coons (D-DE) | November 15, 2010 | |
| 87 | 1918 | Mark Kirk (R-IL) | November 29, 2010 | |
| 88 | 1785 | Dan Coats (R-IN) | January 3, 2011 | Former U.S. senator |
| 89 | 1919 | Roy Blunt (R-MO) | January 3, 2011 | Former member of the U.S. House of Representatives (14 years); Missouri 17th in population (2000) |
| 90 | 1920 | Jerry Moran (R-KS) | January 3, 2011 | Former member of the U.S. House of Representatives (14 years); Kansas 32nd in population (2000) |
| 91 | 1921 | Rob Portman (R-OH) | January 3, 2011 | Former member of the U.S. House of Representatives (12 years) |
| 92 | 1922 | John Boozman (R-AR) | January 3, 2011 | Former U.S. Representative (9 years) |
| 93 | 1923 | Pat Toomey (R-PA) | January 3, 2011 | Former U.S. Representative (6 years) |
| 94 | 1924 | John Hoeven (R-ND) | January 3, 2011 | Former governor |
| 95 | 1925 | Marco Rubio (R-FL) | January 3, 2011 | Florida 4th in population (2000) |
| 96 | 1926 | Ron Johnson (R-WI) | January 3, 2011 | Wisconsin 18th in population (2000) |
| 97 | 1927 | Rand Paul (R-KY) | January 3, 2011 | Kentucky 25th in population (2000) |
| 98 | 1928 | Richard Blumenthal (D-CT) | January 3, 2011 | Connecticut 29th in population (2000) |
| 99 | 1929 | Mike Lee (R-UT) | January 3, 2011 | Utah 34th in population (2000) |
| 100 | 1930 | Kelly Ayotte (R-NH) | January 3, 2011 | New Hampshire 41st in population (2000) |
| | 1931 | Dean Heller (R-NV) | May 9, 2011 | |
| | 1932 | Brian Schatz (D-HI) | December 26, 2012 | |
| | 1933 | Tim Scott (R-SC) | January 2, 2013 | |
The most senior senators by class were Richard Lugar (R-Indiana) from Class 1, Max Baucus (D-Montana) from Class 2, and Daniel Inouye (D-Hawaii) from Class 3. Inouye died on December 17, 2012 with Patrick Leahy (D-Vermont) became the senior senator in his class on the final days of the current congress.