House Races
| State | Filing Deadline | Primary Date | No. of Seats |
| Alabama | April 4 | June 3 | 7 |
| Alaska | June 2 | Aug. 26 | 1 |
| Arizona | June 4 | Sept. 2 | 8 |
| Arkansas | March 10 | May 20 | 4 |
| California | March 7 | June 3 | 53 |
| Colorado | June 17 | Aug. 12 | 7 |
| Connecticut | June 10 | Aug. 12 | 5 |
| Delaware | July 25 | Sept. 9 | 1 |
| Florida | June 20 | Aug. 26 | 25 |
| Georgia | May 2 | July 15 | 13 |
| Hawaii | July 22 | Sept. 20 | 2 |
| Idaho | March 21 | May 27 | 2 |
| Illinois | Nov. 5, 2007 | Feb. 5 | 19 |
| Indiana | Feb. 22 | May 6 | 9 |
| Iowa | March 14 | June 3 | 5 |
| Kansas | June 10 | Aug. 5 | 4 |
| Kentucky | Jan. 29 | May 20 | 6 |
| Louisiana | July 11 | Sept. 6 | 7 |
| Maine | March 15 | June 10 | 2 |
| Maryland | Dec. 3, 2007 | Feb. 12 | 8 |
| Massachusetts | May 6 | Sept. 16 | 10 |
| Michigan | May 13 | Aug. 5 | 15 |
| Minnesota | July 15 | Sept. 9 | 8 |
| Mississippi | Jan. 11 | March 11 | 4 |
| Missouri | March 25 | Aug. 5 | 9 |
| Montana | March 20 | June 3 | 1 |
| Nebraska | March 1 | May 13 | 3 |
| Nevada | May 16 | Aug. 12 | 3 |
| New Hampshire | June 13 | Sept. 9 | 2 |
| New Jersey | April 7 | June 3 | 13 |
| New Mexico | Feb. 12 | June 3 | 3 |
| New York | July 10 | Sept. 9 | 29 |
| North Carolina | Feb. 29 | May 6 | 13 |
| North Dakota | April 11 | June 10 | 1 |
| Ohio | Jan. 4 | March 4 | 18 |
| Oklahoma | June 4 | July 29 | 5 |
| Oregon | March 11 | May 20 | 5 |
| Pennsylvania | Feb. 12 | April 22 | 19 |
| Rhode Island | June 25 | Sept. 9 | 2 |
| South Carolina | March 31 | June 10 | 6 |
| South Dakota | March 25 | June 3 | 1 |
| Tennessee | April 3 | Aug. 7 | 9 |
| Texas | Jan. 2 | March 4 | 32 |
| Utah | March 17 | June 24 | 3 |
| Vermont | July 21 | Sept. 9 | 1 |
| Virginia | April 16 | June 10 | 11 |
| Washington | June 6 | Aug. 19 | 9 |
| West Virginia | Jan. 26 | May 13 | 3 |
| Wisconsin | July 8 | Sept. 9 | 8 |
| Wyoming | May 30 | Aug. 19 | 1 |
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