The Pennsylvania General Assembly, consisting of the House of Representatives and the Senate, convened on January 21, 1873, to elect a Senator to fill the term beginning on March 4, 1873. Incumbent Republican Simon Cameron, who was elected in 1867, was a successful candidate for re-election to another term. The results of the vote of both houses combined are as follows:
|Republican||Simon Cameron (Inc.)||76||57.14|
|Democratic||William A. Wallace||50||37.59|
|Liberal Republican||Thomas Marshall||1||0.75|
- "U.S. Senate Election - 21 January 1873" (PDF). Wilkes University. Retrieved 22 December 2013.