On May 1, 1826, Alexander Thomson (J) of Pennsylvania's 13th district resigned.[1] A special election was held to fill the resulting vacancy on October 10, 1826, the same day as the general elections to the 20th Congress.
Election results
| Candidate | Party | Votes[2] | Percent |
|---|---|---|---|
| Chauncey Forward | Jacksonian | 2,597 | 65.3% |
| William Piper | [3] | 1,378 | 34.7% |
Forward took his seat on December 4, 1826, at the start of the Second Session of Congress.[4]