U.S. House seat for Massachusetts's 5th congressional district. Representatives serve two-year terms.

3 candidates filed, 1 active for the 2026 House election in Massachusetts District 5. Party primary on Sep 1, 2026. General election on Nov 3, 2026.
| Year | Winner | Result | Runner-Up | Total Votes |
|---|---|---|---|---|
| 2024 | Katherine M. Clark D | 100.0% | 286,689 | |
| 2022 | Katherine M Clark D | 74.0% | 275,485 | |
| 2020 | Katherine M Clark D | 74.4% | 395,778 | |
| 2018 | Katherine M Clark D | 75.9% | 311,099 | |
| 2016 | Katherine M Clark D | 100.0% | 285,606 | |
| 2014 | Katherine M Clark D | 100.0% | 182,100 | |
| 2012 | Edward J Markey D | 75.6% | 340,434 | |
| 2010 | Niki Tsongas D | 54.9% | 223,882 | |
| 2008 | Niki Tsongas D | 100.0% | 225,947 | |
| 2006 | Martin T Meehan D | 100.0% | 159,120 | |
| 2004 | Martin T Meehan D | 67.1% | 267,884 | |
| 2002 | Martin T Meehan D | 60.2% | 203,628 | |
| 2000 | Martin T Meehan D | 100.0% | 199,601 | |
| 1998 | Martin T Meehan D | 70.7% | 180,143 | |
| 1996 | Martin T Meehan D | 100.0% | 183,429 |