West Mifflin, PA is a city located in Allegheny County, Pennsylvania and has a land area of 13.00 square miles (33.67 km2). The water area for the city is 0.19 square miles or 0.49 km2. There are 2 total unique zip codes in West Mifflin, Pennsylvania. The area code(s) for West Mifflin is 412.
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