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_ |
|---|---|---|---|---|---|
| 244 | Tom Tancredo | R | CO-6 | January 3, 1999 | Left the House in 2009 |
| 245 | Lee Terry | R | NE-2 | January 3, 1999 |  |
| 246 | Mike Thompson | D | CA-01 | January 3, 1999 |  |
| 247 | Mark Udall | D | CO-2 | January 3, 1999 | Left the House in 2009 |
| 248 | Tom Udall | D | NM-3 | January 3, 1999 | Left the House in 2009 |
| 249 | Greg Walden | R | OR-2 | January 3, 1999 |  |
| 250 | Anthony Weiner | D | NY-09 | January 3, 1999 |  |
| 251 | David Wu | D | OR-1 | January 3, 1999 |  |
| 252 | Joe Baca | D | CA-43 | November 16, 1999 |  |
| 253 | Jane Harman | D | CA-36 | January 3, 2001 | Previously served from 1993 to 1999. |
| 254 | Todd Akin | R | MO-2 | January 3, 2001 |  |