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

6 candidates filed, 2 active for the 2026 House election in Pennsylvania District 4. Party primary on May 19, 2026. General election on Nov 3, 2026.
| Year | Winner | Result | Runner-Up | Total Votes |
|---|---|---|---|---|
| 2024 | Madeleine Dean D | 59.1% | 455,523 | |
| 2022 | Madeleine Dean D | 61.3% | 366,785 | |
| 2020 | Madeleine Dean Cunnane D | 59.5% | 444,563 | |
| 2018 | Madeleine Dean Cunnane D | 63.5% | 332,991 | |
| 2016 | Scott Perry R | 66.1% | 334,000 | |
| 2014 | Scott Perry R | 74.5% | 197,340 | |
| 2012 | Scott Perry R | 59.7% | 303,980 | |
| 2010 | Jason Altmire D | 50.8% | 237,785 | |
| 2008 | Jason Altmire D | 55.9% | 333,947 | |
| 2006 | Jason Altmire D | 51.9% | 253,896 | |
| 2004 | Melissa A Hart R | 63.1% | 323,917 | |
| 2002 | Melissa A Hart R | 64.6% | 202,208 | |
| 2000 | Melissa Hart R | 59.0% | 246,385 | |
| 1998 | Ron Klink D | 63.8% | 161,668 | |
| 1996 | Ron Klink D | 64.2% | 222,069 |