The 1885 United States Senate election in Pennsylvania was held on January 20, 1885. J. Donald Cameron was re-elected by the Pennsylvania General Assembly to the United States Senate.[1]
The Pennsylvania General Assembly, consisting of the House of Representatives and the Senate, convened on January 20, 1885, to elect a Senator to fill the term beginning on March 4, 1885. Incumbent Republican J. Donald Cameron, who was elected in an 1877 special election and re-elected in 1879, was a successful candidate for re-election to another term. The results of the vote of both houses combined are as follows:
|-|-bgcolor="#EEEEEE"| colspan="3" align="right" | Totals| align="right" | 251| align="right" | 100.00%|}