U.S. House seat for New York's 21st congressional district. Representatives serve two-year terms.

15 candidates filed, 2 active for the 2026 House election in New York District 21. Party primary on Jun 23, 2026. General election on Nov 3, 2026.
| Year | Winner | Result | Runner-Up | Total Votes |
|---|---|---|---|---|
| 2024 | Elise M. Stefanik R | 61.7% | 316,753 | |
| 2022 | Elise M Stefanik R | 56.4% | 267,016 | |
| 2020 | Elise M Stefanik R | 58.1% | 292,106 | |
| 2018 | Elise M Stefanik R | 54.6% | 213,264 | |
| 2016 | Elise M Stefanik R | 63.3% | 241,014 | |
| 2014 | Elise M Stefanik R | 52.4% | 151,993 | |
| 2012 | William L Owens D | 87.4% | 134,907 | |
| 2010 | Paul Tonko D | 83.0% | 150,430 | |
| 2008 | Paul D Tonko D | 89.2% | 179,146 | |
| 2006 | Michael R Mcnulty D | 75.0% | 186,749 | |
| 2004 | Michael R Mcnulty D | 67.6% | 247,368 | |
| 2002 | Michael R Mcnulty D | 70.6% | 182,109 | |
| 2000 | Michael R Mcnulty D | 72.3% | 218,106 | |
| 1998 | Michael R Mcnulty D | 70.8% | 174,569 | |
| 1996 | Michael R Mcnulty D | 88.0% | 155,599 |