U.S. House seat for Massachusetts's 6th congressional district. Representatives serve two-year terms.

12 candidates filed, 2 active for the 2026 House election in Massachusetts District 6. Party primary on Sep 1, 2026. General election on Nov 3, 2026.
| Year | Winner | Result | Runner-Up | Total Votes |
|---|---|---|---|---|
| 2024 | Seth Moulton D | 100.0% | 321,186 | |
| 2022 | Seth Moulton D | 62.9% | 314,884 | |
| 2020 | Seth Moulton D | 65.5% | 437,072 | |
| 2018 | Seth W Moulton D | 65.2% | 333,810 | |
| 2016 | Seth Moulton D | 100.0% | 308,923 | |
| 2014 | Seth W Moulton D | 55.0% | 272,000 | |
| 2012 | John F Tierney D | 48.3% | 374,293 | |
| 2010 | John F Tierney D | 56.9% | 250,662 | |
| 2008 | John F Tierney D | 70.5% | 321,061 | |
| 2006 | John F Tierney D | 69.7% | 241,053 | |
| 2004 | John F Tierney D | 70.0% | 305,055 | |
| 2002 | John F Tierney D | 68.3% | 238,362 | |
| 2000 | John F Tierney D | 71.1% | 288,825 | |
| 1998 | John F Tierney D | 54.6% | 214,662 | |
| 1996 | John F Tierney D | 48.2% | 275,785 |