A special election was held in Pennsylvania's 4th congressional district on October 13, 1801 to fill a vacancy left by the resignation of Peter Muhlenberg (DR) on November 27, 1800, prior to the beginning of the 7th Congress. Muhlenberg had been elected to the Senate.
Election results
There were no other candidates for the vacant seat.
References
Pennsylvania's 4th congressional district special election, 1801 Wikipedia(Text) CC BY-SA