ZIP Code 15123
About West Mifflin
West Mifflin is a borough in Allegheny County, Pennsylvania, United States, located southeast of Pittsburgh. The population was 19,589 at the 2020 census. It is named after Thomas Mifflin, the first governor of Pennsylvania and a U.S. Founding Father.
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Area Profile
US Census (ACS 5-year · Gazetteer)
2
population
29
people / sq mi
0
housing units
0
households
0.1
land area (sq mi)