U.S. House seat for Massachusetts's 1st congressional district. Representatives serve two-year terms.

6 candidates filed, 2 active for the 2026 House election in Massachusetts District 1. Party primary on Sep 1, 2026. General election on Nov 3, 2026.
| Year | Winner | Result | Runner-Up | Total Votes |
|---|---|---|---|---|
| 2024 | Richard E. Neal D | 62.6% | 356,877 | |
| 2022 | Richard E Neal D | 61.6% | 256,021 | |
| 2020 | Richard E Neal D | 99.5% | 276,650 | |
| 2018 | Richard E Neal D | 100.0% | 211,790 | |
| 2016 | Richard E Neal D | 73.5% | 320,818 | |
| 2014 | Richard E Neal D | 100.0% | 167,612 | |
| 2012 | Richard E Neal D | 100.0% | 261,936 | |
| 2010 | John W Olver D | 60.0% | 213,309 | |
| 2008 | John W Olver D | 72.9% | 295,763 | |
| 2006 | John W Olver D | 76.5% | 206,631 | |
| 2004 | John W Olver D | 100.0% | 229,465 | |
| 2002 | John W Olver D | 67.6% | 203,902 | |
| 2000 | John W Olver D | 68.3% | 248,112 | |
| 1998 | John W Olver D | 71.7% | 169,918 | |
| 1996 | John W Olver D | 52.7% | 245,033 |