There are 31 zip codes in Butler County, Pennsylvania. The most populated is 16001, located in Butler. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
1600139,808Butler
1606633,071Cranberry Twp
1604618,772Mars
1600215,944Butler
1605715,067Slippery Rock
160599,394Valencia
160558,548Sarver
160638,128Zelienople
160337,376Evans City
160254,858Chicora
160374,709Harmony
160564,620Saxonburg
160234,387Cabot
160533,478Renfrew
160383,214Harrisville
160513,035Portersville
160612,705West Sunbury
160522,321Prospect
160412,105Karns City
160341,831Fenelton
160201,190Boyers
160401,066Hilliards
16045999Lyndora
16050931Petrolia
16029906East Butler
16027392Connoquenessing
16030327Eau Claire
16024291Callery
16022279Bruin
16048221North Washington
16035141Forestville
showing: 31 rows

Zip Codes in Butler County, Pennsylvania by Population (2024)