|Elections in Pennsylvania|
The Democratic-Republican Peter Muhlenberg was elected to the United States Senate by the Pennsylvania General Assembly, consisting of the House of Representatives and the Senate, in February 1801. Sen. Muhlenberg resigned on June 30, 1801, after being appointed supervisor of revenue for Pennsylvania by President Thomas Jefferson.
Following the resignation of Sen. Peter Muhlenberg, the Pennsylvania General Assembly convened on December 17, 1801, to elect a new Senator to fill the vacancy. The results of the vote of both houses combined are as follows:
| Pennsylvania U.S. Senate election (Class III)