U.S. House seat for Massachusetts's 4th congressional district. Representatives serve two-year terms.

7 candidates filed, 2 active for the 2026 House election in Massachusetts District 4. Party primary on Sep 1, 2026. General election on Nov 3, 2026.
| Year | Winner | Result | Runner-Up | Total Votes |
|---|---|---|---|---|
| 2024 | Jake Auchincloss D | 100.0% | 289,347 | |
| 2022 | Jake Auchincloss D | 100.0% | 201,882 | |
| 2020 | Jake Auchincloss D | 61.0% | 411,576 | |
| 2018 | Joseph P Kennedy Iii D | 100.0% | 245,289 | |
| 2016 | Joseph P Kennedy Iii D | 70.2% | 378,878 | |
| 2014 | Joseph P Kennedy Iii D | 100.0% | 184,158 | |
| 2012 | Joseph P Kennedy Iii D | 61.1% | 361,980 | |
| 2010 | Barney Frank D | 53.9% | 234,029 | |
| 2008 | Barney Frank D | 68.0% | 298,451 | |
| 2006 | Barney Frank D | 100.0% | 176,513 | |
| 2004 | Barney Frank D | 77.9% | 281,553 | |
| 2002 | Barney Frank D | 100.0% | 166,125 | |
| 2000 | Barney Frank D | 74.9% | 267,744 | |
| 1998 | Barney Frank D | 100.0% | 148,340 | |
| 1996 | Barney Frank D | 71.7% | 256,545 |