West Mifflin

County:: Allegheny County
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.

Demographics

The racial composition of West Mifflin includes 81.92% White, 10.07% Black or African American, and smaller percentages for Asian, other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Black or African American

Two or more races

Asian

Other race

Native American

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	15,841	81.92%
Black or African American	1,948	10.07%
Two or more races	1,295	6.7%
Asian	189	0.98%
Other race	38	0.2%
Native American	27	0.14%
Native Hawaiian or Pacific Islander	0	0%

West Mifflin Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

West Mifflin's average per capita income is $50,195. Household income levels show a median of $70,335. The poverty rate stands at 11.85%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.

Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.

Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.

Name	Median	Mean
Married Families	$98,814	-
Families	$92,747	$99,256
Households	$70,335	$82,130
Non Families	$41,727	$55,092

$50,195

Average Income

$70,335

Median Household Income

11.85%

Poverty Rate