List of United States Representatives in the 110th Congress by seniority U.S. House seniority list U.S. House seniority

| Rank_ | Representative | Party | District | Seniority_date | Notes_ |
|---|---|---|---|---|---|
| 396 | Joe Courtney | D | CT-2 | January 4, 2007 |  |
| 397 | David Davis | R | TN-1 | January 4, 2007 | Left the House in 2009. |
| 398 | Joe Donnelly | D | IN-2 | January 4, 2007 |  |
| 399 | Keith Ellison | D | MN-5 | January 4, 2007 |  |
| 400 | Brad Ellsworth | D | IN-8 | January 4, 2007 |  |
| 401 | Mary Fallin | R | OK-5 | January 4, 2007 |  |
| 402 | Gabrielle Giffords | D | AZ-8 | January 4, 2007 |  |
| 403 | Kirsten Gillibrand | D | NY-20 | January 4, 2007 |  |
| 404 | John Hall | D | NY-19 | January 4, 2007 |  |
| 405 | Phil Hare | D | IL-17 | January 4, 2007 |  |
| 406 | Dean Heller | R | NV-2 | January 4, 2007 |  |
| 407 | Mazie Hirono | D | HI-2 | January 4, 2007 |  |