West Mifflin Flag

West Mifflin

County Seat:
No
Area (mi²):
14.218
State:
Pennsylvania

West Mifflin is a borough located in Allegheny County, Pennsylvania. West Mifflin has a 2025 population of 18,483. West Mifflin is currently declining at a rate of -1.16% annually and its population has decreased by -5.53% since the most recent census, which recorded a population of 19,565 in 2020.

The average household income in West Mifflin is $82,130 with a poverty rate of 11.85%The median age in West Mifflin is 44.7 years: 41.3 years for males, and 48.9 years for females.

18.5K
Total Population
1,300
Density (mi²)
-216 -1.16%
Growth

West Mifflin Population

Demographics

Economics and Income Statistics

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)