| Senate class | | State | Senator's image | Senator's name | Senator's party | Governor's party | Senator's prior experience | Senator's education | Senator first took
office | Senator born |
| 3 | | Alabama |  | Richard Shelby | Republican | Republican (Bob Riley) | Alabama Senate; U.S. House (AL-7) | Alabama (BA, JD) | 1987 | 1934 |
| 2 | | Alabama |  | Jeff Sessions | Republican | Republican (Bob Riley) | State Attorney General | Huntingdon College, University of Alabama | 1997 | 1946 |
| 3 | | Alaska |  | Lisa Murkowski | Republican | Republican (Sean Parnell) | Alaska House of Representatives | Georgetown, Willamette | 2002 | 1957 |
| 2 | | Alaska |  | Mark Begich | Democratic | Republican (Sean Parnell) | Mayor of Anchorage | University of Alaska Anchorage (attended) | 2009 | 1962 |
| 3 | | Arizona |  | John McCain | Republican | Republican (Jan Brewer) | Military, U.S. House | U.S. Naval Academy[1] | 1987 | 1936 |
| 1 | | Arizona |  | Jon Kyl | Republican | Republican (Jan Brewer) | Attorney, U.S. House | Arizona (BA, JD) | 1995 | 1942 |
| 3 | | Arkansas |  | Blanche Lincoln | Democratic | Democratic (Mike Beebe) | U.S. House | Randolph-Macon Women's College, Arkansas | 1999 | 1960 |
| 2 | | Arkansas |  | Mark Pryor | Democratic | Democratic (Mike Beebe) | Arkansas House of Representatives, State Attorney General | Arkansas (BA, JD) | 2003 | 1963 |
| 1 | | California |  | Dianne Feinstein | Democratic | Republican (Arnold Schwarzenegger) | Mayor of San Francisco, San Francisco Board of Supervisors | Stanford | 1992 | 1933 |
| 3 | | California |  | Barbara Boxer | Democratic | Republican (Arnold Schwarzenegger) | Marin County Board of Supervisors, U.S. House | Brooklyn | 1993 | 1940 |
| 2 | | Colorado |  | Mark Udall | Democratic | Democratic (Bill Ritter) | State Representative, U.S. House | Williams | 2009 | 1950 |
| 3 | | Colorado |  | Michael Bennet | Democratic | Democratic (Bill Ritter) | Superintendent, Denver Public Schools | Wesleyan, Yale Law | 2009 | 1964 |
| 3 | | Connecticut |  | Chris Dodd | Democratic | Republican (M. Jodi Rell) | U.S. House | Providence, Louisville | 1981 | 1944 |
| 1 | | Connecticut |  | Joe Lieberman | Independent Democratic | Republican (M. Jodi Rell) | State Attorney General | Yale (BA, LLB) | 1989 | 1942 |
| 1 | | Delaware |  | Tom Carper | Democratic | Democratic (Jack Markell) | Governor; U.S. House; Delaware Treasurer | Ohio State, Delaware | 2001 | 1947 |
| 2 | | Delaware |  | Ted Kaufman | Democratic | Democratic (Jack Markell) | Chief of Staff of Senator Joe Biden | Duke, Pennsylvania | 2009 | 1939 |
| 1 | | Florida |  | Bill Nelson | Democratic | Republican (Charlie Crist) | U.S. House of Representatives, State Treasurer | Yale, Virginia | 2001 | 1942 |
| 3 | | Florida |  | Mel Martinez | Republican | Republican (Charlie Crist) | U.S. Secretary of Housing and Urban Development | Florida State (BA, JD) | 2005 | 1946 |
| 2 | | Georgia |  | Saxby Chambliss | Republican | Republican (Sonny Perdue) | U.S. House | Georgia, Tennessee | 2003 | 1943 |
| 3 | | Georgia |  | Johnny Isakson | Republican | Republican (Sonny Perdue) | U.S. House (GA-6) | Georgia | 2005 | 1944 |
| 3 | | Hawaii |  | Daniel Inouye | Democratic | Republican (Linda Lingle) | U.S. House (HI-At Large) | Hawaii, George Washington | 1963 | 1924 |
| 1 | | Hawaii |  | Daniel Akaka | Democratic | Republican (Linda Lingle) | U.S. House | Hawaii (BA, M.Ed.) | 1991 | 1924 |
| 3 | | Idaho |  | Mike Crapo | Republican | Republican (Butch Otter) | Idaho State Senate, U.S. House (ID-2) | Brigham Young, Harvard Law | 1999 | 1951 |
| 2 | | Idaho |  | Jim Risch | Republican | Republican (Butch Otter) | State Senate Majority Leader, Governor of Idaho, Lieutenant Governor of Idaho | Idaho | 2009 | 1943 |
| 2 | | Illinois |  | Dick Durbin | Democratic | Democratic (Pat Quinn) | U.S. House | Georgetown (BS, JD) | 1997 | 1944 |
| 3 | | Illinois |  | Roland Burris | Democratic | Democratic (Pat Quinn) | Illinois Attorney General, Illinois Comptroller | Howard University School of Law, Southern Illinois University Carbondale (JD, BA) | 2009 | 1937 |
| 1 | | Indiana |  | Richard Lugar | Republican | Republican (Mitch Daniels) | Mayor of Indianapolis | Denison, Oxford | 1977 | 1932 |
| 3 | | Indiana |  | Evan Bayh | Democratic | Republican (Mitch Daniels) | Indiana Secretary of State, Governor | Indiana University, Virginia | 1999 | 1955 |
| 3 | | Iowa |  | Chuck Grassley | Republican | Democratic (Chet Culver) | Iowa House of Representatives, U.S. House (IA-3) | Northern Iowa (BA, MA) | 1981 | 1933 |
| 2 | | Iowa |  | Tom Harkin | Democratic | Democratic (Chet Culver) | U.S. House (IA-5) | Iowa State, Catholic | 1985 | 1939 |
| 3 | | Kansas |  | Sam Brownback | Republican | Democratic (Mark Parkinson) | U.S. House (KS-2) | Kansas State, Kansas | 1996 | 1956 |
| 2 | | Kansas |  | Pat Roberts | Republican | Democratic (Mark Parkinson) | U.S. House (KS-1) | Kansas State | 1997 | 1936 |
| 2 | | Kentucky |  | Mitch McConnell | Republican | Democratic (Steve Beshear) | Jefferson County Executive | Louisville, Kentucky | 1985 | 1942 |
| 3 | | Kentucky |  | Jim Bunning | Republican | Democratic (Steve Beshear) | MLB Baseball player, Fort Thomas City Council, Kentucky State Senate, U.S. House (KY-4) | Xavier | 1999 | 1931 |
| 2 | | Louisiana |  | Mary Landrieu | Democratic | Republican (Bobby Jindal) | State Treasurer | Louisiana State | 1997 | 1955 |
| 3 | | Louisiana |  | David Vitter | Republican | Republican (Bobby Jindal) | U.S. House (LA-1) | Harvard, Oxford, Tulane | 2005 | 1961 |
| 1 | | Maine |  | Olympia Snowe | Republican | Democratic (John Baldacci) | Maine House of Representatives;Maine Senate; U.S. House (ME-2), First Lady of Maine | Maine | 1995 | 1947 |
| 2 | | Maine |  | Susan Collins | Republican | Democratic (John Baldacci) | Deputy State Treasurer | St. Lawrence | 1997 | 1952 |
| 3 | | Maryland |  | Barbara Mikulski | Democratic | Democratic (Martin O'Malley) | Baltimore City Council, U.S. House (MD-3) | Mount Saint Agnes, Maryland | 1987 | 1936 |
| 1 | | Maryland |  | Ben Cardin | Democratic | Democratic (Martin O'Malley) | Maryland House of Delegates, U.S. House (MD-3) | Pittsburgh, Maryland | 2007 | 1943 |
| 1 | | Massachusetts |  | Ted Kennedy | Democratic | Democratic (Deval Patrick) | lawyer | Harvard, Virginia | 1962 | 1932 |
| 2 | | Massachusetts |  | John Kerry | Democratic | Democratic (Deval Patrick) | Lieutenant Governor | Yale, Boston College | 1985 | 1943 |
| 2 | | Michigan |  | Carl Levin | Democratic | Democratic (Jennifer Granholm) | Detroit City Council | Swarthmore, Harvard | 1979 | 1934 |
| 1 | | Michigan |  | Debbie Stabenow | Democratic | Democratic (Jennifer Granholm) | Ingham County Board of Commissioners, Michigan House of Representatives, Michigan Senate, U.S. House (MI-8) | Michigan State (BA, MSW) | 2001 | 1950 |
| 1 | | Minnesota |  | Amy Klobuchar | Democratic-Farmer-Labor | Republican (Tim Pawlenty) | Hennepin County Attorney | Yale, Chicago | 2007 | 1960 |
| 2 | | Minnesota |  | Al Franken | Democratic-Farmer-Labor | Republican (Tim Pawlenty) | Comedian, actor, author, screenwriter, political commentator, and radio host | Harvard | 2009 | 1951 |
| 2 | | Mississippi |  | Thad Cochran | Republican | Republican (Haley Barbour) | U.S. House (MS-4) | Mississippi (BA, JD) | 1979 | 1937 |
| 1 | | Mississippi |  | Roger Wicker | Republican | Republican (Haley Barbour) | U.S. House (MS-1) | Mississippi (BA, JD) | 2007 | 1951 |
| 3 | | Missouri |  | Kit Bond | Republican | Democratic (Jay Nixon) | State Auditor, Governor | Princeton, Virginia | 1987 | 1939 |
| 1 | | Missouri |  | Claire McCaskill | Democratic | Democratic (Jay Nixon) | State Auditor; Missouri House of Representatives;Jackson County Prosecutor | University of Missouri (BS, JD) | 2007 | 1953 |
| 2 | | Montana |  | Max Baucus | Democratic | Democratic (Brian Schweitzer) | U.S. House (MT-1) | Stanford (BS, LLB) | 1979 | 1941 |
| 1 | | Montana |  | Jon Tester | Democratic | Democratic (Brian Schweitzer) | Montana State Senate President | Great Falls | 2007 | 1956 |
| 1 | | Nebraska |  | Ben Nelson | Democratic | Republican (Dave Heineman) | Governor | University of Nebraska (BA, MA, JD) | 2001 | 1941 |
| 2 | | Nebraska |  | Mike Johanns | Republican | Republican (Dave Heineman) | Mayor of Lincoln, Governor of Nebraska, US Secretary of Agriculture | St. Mary's University, Creighton University | 2009 | 1950 |
| 3 | | Nevada |  | Harry Reid | Democratic | Republican (Jim Gibbons) | Nevada Assembly, Lt. Governor of Nevada, U.S. House (NV-1) | Southern Utah, Utah State, George Washington | 1987 | 1939 |
| 1 | | Nevada |  | John Ensign | Republican | Republican (Jim Gibbons) | U.S. House (NV-1) | UNLV, Oregon State, Colorado | 2001 | 1958 |
| 3 | | New Hampshire |  | Judd Gregg | Republican | Democratic (John Lynch) | Governor, U.S. House (NH-2) | Columbia, Boston University | 1993 | 1947 |
| 2 | | New Hampshire |  | Jeanne Shaheen | Democratic | Democratic (John Lynch) | New Hampshire State Senate, Governor | Shippensburg University, University of Mississippi | 2009 | 1947 |
| 2 | | New Jersey |  | Frank Lautenberg | Democratic | Democratic (Jon Corzine) | U.S. Senate, Class 1 | Columbia | 2003 | 1924 |
| 1 | | New Jersey |  | Bob Menendez | Democratic | Democratic (Jon Corzine) | Union City Board of Education, Mayor of Union City, New Jersey General Assembly, New Jersey Senate, U.S. House (NJ-13) | Saint Peter's College, Rutgers | 2006 | 1954 |
| 1 | | New Mexico |  | Jeff Bingaman | Democratic | Democratic (Bill Richardson) | State Attorney General | Harvard, Stanford | 1983 | 1943 |
| 2 | | New Mexico |  | Tom Udall | Democratic | Democratic (Bill Richardson) | U.S. House (NM-3), State Attorney General | Prescott College, Cambridge University (J.D.), University of New Mexico School of Law | 2009 | 1948 |
| 3 | | New York |  | Chuck Schumer | Democratic | Democratic (David Paterson) | New York State Assembly, U.S. House (NY-9) | Harvard (BA, JD) | 1999 | 1950 |
| 1 | | New York |  | Kirsten Gillibrand | Democratic | Democratic (David Paterson) | U.S. House (NY-20) | Dartmouth, UCLA | 2009 | 1966 |
| 3 | | North Carolina |  | Richard Burr | Republican | Democratic (Beverly Perdue) | U.S. House (NC-5) | Wake Forest | 2005 | 1955 |
| 2 | | North Carolina |  | Kay Hagan | Democratic | Democratic (Beverly Perdue) | Sunday School Teacher, North Carolina State Senate (27, 32) | Florida State University, Wake Forest University | 2009 | 1953 |
| 1 | | North Dakota | File:SenatorConradOfficialPortrait.jpg | Kent Conrad | Democratic | Republican (John Hoeven) | State Tax Commissioner | Stanford, George Washington | 1987 | 1948 |
| 3 | | North Dakota |  | Byron Dorgan | Democratic | Republican (John Hoeven) | U.S. House (ND-At Large) | North Dakota, Denver | 1993 | 1942 |
| 3 | | Ohio |  | George Voinovich | Republican | Democratic (Ted Strickland) | Mayor of Cleveland; Governor | Ohio, Ohio State | 1999 | 1936 |
| 1 | | Ohio |  | Sherrod Brown | Democratic | Democratic (Ted Strickland) | State Secretary of State, U.S. House (OH-13) | Yale, Ohio State | 2007 | 1952 |
| 2 | | Oklahoma |  | Jim Inhofe | Republican | Democratic (Brad Henry) | Oklahoma House of Rep; Oklahoma Senate; Mayor of Tulsa; U.S. House (OK-1) | Tulsa | 1995 | 1934 |
| 3 | | Oklahoma |  | Tom Coburn | Republican | Democratic (Brad Henry) | Physician, U.S. House (OK-2) | Oklahoma State, Oklahoma | 2005 | 1948 |
| 3 | | Oregon |  | Ron Wyden | Democratic | Democratic (Ted Kulongoski) | U.S. House (OR-3) | Stanford, Oregon | 1996 | 1949 |
| 2 | | Oregon |  | Jeff Merkley | Democratic | Democratic (Ted Kulongoski) | State House Speaker | Stanford (B.A.), Princeton (M.P.P.) | 2009 | 1956 |
| 3 | | Pennsylvania |  | Arlen Specter | Democratic | Democratic (Ed Rendell) | Philadelphia District Attorney | Pennsylvania, Yale | 1981 | 1930 |
| 1 | | Pennsylvania |  | Bob Casey, Jr. | Democratic | Democratic (Ed Rendell) | State Treasurer, State Auditor | Holy Cross, Catholic | 2007 | 1960 |
| 2 | | Rhode Island |  | Jack Reed | Democratic | Republican (Donald Carcieri) | State Senate; U.S. House (RI-2) | United States Military Academy, Harvard | 1997 | 1949 |
| 1 | | Rhode Island |  | Sheldon Whitehouse | Democratic | Republican (Donald Carcieri) | US Attorney for Rhode Island, State Attorney General | Yale, Virginia | 2007 | 1955 |
| 2 | | South Carolina |  | Lindsey Graham | Republican | Republican (Mark Sanford) | U.S. House (SC-3) | South Carolina (BA, JD) | 2003 | 1955 |
| 3 | | South Carolina |  | Jim DeMint | Republican | Republican (Mark Sanford) | U.S. House (SC-4) | Tennessee, Clemson University | 2005 | 1951 |
| 2 | | South Dakota |  | Tim Johnson | Democratic | Republican (Mike Rounds) | U.S. House (SD-At Large) | South Dakota (BA, MPA, JD) | 1997 | 1946 |
| 3 | | South Dakota |  | John Thune | Republican | Republican (Mike Rounds) | U.S. House (SD-At Large) | Biola, South Dakota | 2005 | 1961 |
| 2 | | Tennessee |  | Lamar Alexander | Republican | Democratic (Phil Bredesen) | Governor; U.S. Secretary of Education | Vanderbilt, New York University | 2003 | 1940 |
| 1 | | Tennessee |  | Bob Corker | Republican | Democratic (Phil Bredesen) | Mayor of Chattanooga | Tennessee | 2007 | 1952 |
| 1 | | Texas |  | Kay Bailey Hutchison | Republican | Republican (Rick Perry) | State Treasurer | Texas (BA, JD) | 1993 | 1943 |
| 2 | | Texas |  | John Cornyn | Republican | Republican (Rick Perry) | State Attorney General | Trinity University, St. Mary's University, Virginia | 2003 | 1952 |
| 1 | | Utah |  | Orrin Hatch | Republican | Republican (Gary Herbert) | attorney | Brigham Young, Pittsburgh | 1977 | 1934 |
| 3 | | Utah |  | Robert Foster Bennett | Republican | Republican (Gary Herbert) | businessman | Utah | 1993 | 1933 |
| 3 | | Vermont |  | Patrick Leahy | Democratic | Republican (Jim Douglas) | Chittenden County State's Attorney | St. Michael's College, Georgetown | 1975 | 1940 |
| 1 | | Vermont |  | Bernie Sanders | Independent | Republican (Jim Douglas) | U.S. House (VT-At Large) | Brooklyn College, Chicago | 2007 | 1941 |
| 1 | | Virginia |  | Jim Webb | Democratic | Democratic (Tim Kaine) | U.S. Secretary of the Navy | U.S. Naval Academy, USC, Georgetown University | 2007 | 1946 |
| 2 | | Virginia |  | Mark Warner | Democratic | Democratic (Tim Kaine) | Entrepreneur, Governor | George Washington, Harvard | 2009 | 1954 |
| 3 | | Washington |  | Patty Murray | Democratic | Democratic (Christine Gregoire) | State Senate | Washington State | 1993 | 1950 |
| 1 | | Washington | | Maria Cantwell | Democratic | Democratic (Christine Gregoire) | Washington State House of Representatives, U.S. House (WA-1) | Miami University | 2001 | 1958 |
| 1 | | West Virginia |  | Robert Byrd | Democratic | Democratic (Joe Manchin) | U.S. House (WV-6) | Marshall, George Washington, American | 1959 | 1917 |
| 2 | | West Virginia |  | Jay Rockefeller | Democratic | Democratic (Joe Manchin) | Governor | Harvard | 1985 | 1937 |
| 1 | | Wisconsin |  | Herb Kohl | Democratic | Democratic (Jim Doyle) | State Democratic Party chairman | Wisconsin-Madison, Harvard | 1989 | 1935 |
| 3 | | Wisconsin |  | Russ Feingold | Democratic | Democratic (Jim Doyle) | State Senate | Wisconsin-Madison, Oxford, Harvard | 1993 | 1953 |
| 2 | | Wyoming |  | Mike Enzi | Republican | Democratic (Dave Freudenthal) | Mayor of Gillette; Wyoming House of Representatives; State Senate | George Washington, Denver | 1997 | 1944 |
| 1 | | Wyoming |  | John Barrasso | Republican | Democratic (Dave Freudenthal) | State Senate | Georgetown (BS, MD) | 2007 | 1952 |
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