Elections to the United States Senate will be held on November 2, 2010, with 34 of the 100 seats in the Senate being contested. Since Senators are elected for six-year terms, those elected will serve from January 3, 2011 until January 3, 2017. They will join Senate Class III, which traces its roots back to the Senators who served full six-year terms from March 4, 1789 until March 3, 1795. Current Class III Senators, who were elected in 2004, will seek reelection or retire in 2010. The House elections will occur on the same date, as well as some state and local elections.
The composition of the Senate going into the 2010 election will depend on the results of the 2008 elections. Of the seats up for election, 19 are held by Republicans and 15 by Democrats.
There may be some additional changes of incumbent to the list below if Senators die or resign. If Senators in other classes die or resign in 2009 or 2010, there may be additional special elections in 2010.
State  |
Incumbent |
Party |
Status |
Possible opposing candidates |
2004 Election Results[15] |
|---|---|---|---|---|---|
| Alabama | Richard Shelby | Republican | Richard Shelby (R) 68%; Wayne Sowell (D) 32% | ||
| Alaska | Lisa Murkowski | Republican | Lisa Murkowski (R) 49%; Tony Knowles (D) 46%; Other 5% | ||
| Arizona | John McCain | Republican | John McCain (R) 77%; Stuart Starky (D) 21%; Other 3% | ||
| Arkansas | Blanche Lincoln | Democratic | Blanche Lincoln (D) 56%; Jim Holt (R) 44% | ||
| California | Barbara Boxer | Democratic | Running for reelection[16] | Arnold Schwarzenegger (R) | Barbara Boxer (D) 58%; Bill Jones (R) 38%; Other 4% |
| Colorado | Ken Salazar | Democratic | Ken Salazar (D) 51%; Pete Coors (R) 47%; Other 2% | ||
| Connecticut | Chris Dodd | Democratic | Chris Dodd (D) 66%; Jack Orchulli (R) 32%; Other 2% | ||
| Florida | Mel Martinez | Republican | Mel Martinez (R) 50% Betty Castor (D) 48%; Other 2% | ||
| Georgia | Johnny Isakson | Republican | Running for reelection[17] | Denise Majette, Sanford Bishop | Johnny Isakson (R) 58%; Denise Majette (D) 40%; Other 2% |
| Hawaii | Daniel Inouye | Democratic | Daniel Inouye (D) 76%; Campbell Cavasso (R) 21%; Other 3% | ||
| Idaho | Mike Crapo | Republican | Mike Crapo (R) 99%; Other 1% | ||
| Illinois | Barack Obama | Democratic | Barack Obama (D) 70%; Alan Keyes (R) 27%; Other 3% | ||
| Indiana | Evan Bayh | Democratic | Evan Bayh (D) 62%; Marvin Scott (R) 37%; Other 1% | ||
| Iowa | Chuck Grassley | Republican | Chuck Grassley (R) 70% Arthur Small 28%; Other 2% | ||
| Kansas | Sam Brownback | Republican | Retiring[18] | Sam Brownback (R) 69%; Lee Jones (D) 28%; Other 3% | |
| Kentucky | Jim Bunning | Republican | Running for reelection[19] | Jim Bunning (R) 51%; Daniel Mongiardo (D) 49% | |
| Louisiana | David Vitter | Republican | David Vitter (R) 51%; Chris John (D) 29%; John Kennedy (D)15%; Other 5% | ||
| Maryland | Barbara Mikulski | Democratic | Barbara Mikulski (D) 65%; E. J. Pipkin (R) 34%; Other 1% | ||
| Missouri | Kit Bond | Republican | Robin Carnahan (D), Russ Carnahan (D), Roger Wilson (D) | Kit Bond (R) 56%; Nancy Farmer (D) 43%; Other 1% | |
| Nevada | Harry Reid | Democratic | Running for reelection[20] | Richard Ziser, Dean Heller | Harry Reid (D) 61%; Richard Ziser (R) 35%; Other 4% |
| New Hampshire | Judd Gregg | Republican | Judd Gregg (R) 66%; Doris Haddock (D) 34% | ||
| New York | Chuck Schumer | Democratic | Chuck Schumer (D) 71%; Howard Mills (R) 24%; Other 5% | ||
| North Carolina | Richard Burr | Republican | Richard Burr (R) 52%; Erskine Bowles (D) 47%; Other 1% | ||
| North Dakota | Byron Dorgan | Democratic | Byron Dorgan (D) 68%; Mike Liffrig (R) 32% | ||
| Ohio | George Voinovich | Republican | Running for reelection[21] | George Voinovich (R) 64%; Eric Fingerhut (D) 36% | |
| Oklahoma | Tom Coburn | Republican | Running for reelection[22] | Tom Coburn (R) 53%; Brad Carson (D) 41%; Sheila Bilyeu (Independent) 6% | |
| Oregon | Ron Wyden | Democratic | Ron Wyden (D) 63%; Al King (R) 32%; Other 5% | ||
| Pennsylvania | Arlen Specter | Republican | Running for reelection[23] | Ed Rendell (D)[24], Chris Matthews[25] | Arlen Specter (R) 53%; Joe Hoeffel (D) 42%; Other 5% |
| South Carolina | Jim DeMint | Republican | Jim DeMint (R) 54%; Inez Tenenbaum (D) 44%; Other 2% | ||
| South Dakota | John Thune | Republican | Tom Daschle (D) 49%; John Thune (R) 51% | ||
| Utah | Robert Bennett | Republican | Robert Bennett (R) 69%; Paul Van Dam (D) 28%; Other 3% | ||
| Vermont | Patrick Leahy | Democratic | Patrick Leahy (D) 71%; Jack McMullen (R) 25%; Other 4% | ||
| Washington | Patty Murray | Democratic | Patty Murray (D) 55%; George Nethercutt (R) 43%; Other 2% | ||
| Wisconsin | Russ Feingold | Democratic | Russ Feingold (D) 56%; Tim Michels (R) 44% |
