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_ |
|---|---|---|---|---|---|
| 339 | Stephanie Herseth | D | SD | June 1, 2004 |  |
| 340 | G. K. Butterfield | D | NC-01 | July 20, 2004 |  |
| 341 | Dan Lungren | R | CA-03 | January 3, 2005 | Previously served from 1979 to 1989. |
| 342 | Bob Inglis | R | SC-4 | January 3, 2005 | Previously served from 1993 to 1999. |
| 343 | John Barrow | D | GA-12 | January 3, 2005 |  |
| 344 | Melissa Bean | D | IL-08 | January 3, 2005 |  |
| 345 | Dan Boren | D | OK-2 | January 3, 2005 |  |
| 346 | Charles Boustany | R | LA-7 | January 3, 2005 |  |
| 347 | Russ Carnahan | D | MO-3 | January 3, 2005 |  |
| 348 | Emanuel Cleaver | D | MO-5 | January 3, 2005 |  |
| 349 | Mike Conaway | R | TX-11 | January 3, 2005 |  |