|Elections in Pennsylvania|
Incumbent Democratic-Republican Abner Lacock, who was elected in 1812, was not a candidate for re-election to another term. The Pennsylvania General Assembly, consisting of the House of Representatives and the Senate, convened on December 8, 1818, to elect a new Senator to fill the term beginning on March 4, 1819. The results of the vote of both houses combined are as follows:
- "U.S. Senate Election - 8 December 1818" (PDF). Wilkes University. Retrieved 22 December 2013.
- Pennsylvania Election Statistics: 1682-2006 from the Wilkes University Election Statistics Project
| Pennsylvania U.S. Senate election (Class III)