|Elections in Pennsylvania|
Incumbent National Republican William Marks, who was elected in 1825, 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 14, 1830, to elect a new Senator to fill the term beginning on March 4, 1831. Twenty-one ballots were recorded over the next three days. The results of the twenty-first and final ballot of both houses combined are as follows:
|Democratic||James S. Stevenson||31||23.48|
|Democratic||George M. Dallas||5||3.79|
- "U.S. Senate Election - 14-16 December 1830" (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)