Connoquenessing Township is served by four zip codes and post offices.
Butler – 16001
345 South Main Street
Butler, PA 16001
Prospect – 16052
106 South Franklin Street
Prospect, PA 16052
Evans City – 16033
126 South Jackson Street
Evans City, PA 16033
Renfrew – 16053
102 East Main Street
Renfrew, PA 16053