West Mifflin, PA Profile: Facts, Map & Data


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West Mifflin, Pennsylvania - Basic Facts

The Borough of West Mifflin had a population of 20,269 as of July 1, 2017. West Mifflin ranks in the upper quartile for Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in Pennsylvania. See peer rankings below.

The primary coordinate point for West Mifflin is located at latitude 40.3577 and longitude -79.9054 in Allegheny County. The formal boundaries for the Borough of West Mifflin (see map below) encompass a land area of 14.21 sq. miles and a water area of 0.29 sq. miles. Allegheny County is in the Eastern time zone (GMT -5). The elevation is 1,089 feet.

The Borough of West Mifflin (GNIS ID: 1214837) has a C5 Census Class Code which indicates an active incorporated place that is independent of any county subdivision and serves as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

Beneath the boundary map are tables with West Mifflin population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2017.

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Borough of West Mifflin, PA Boundary Map

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West Mifflin, PA Data & Demographics (As of July 1, 2017)


Total Population 20,269
Daytime Population: Workers 12,699
Daytime Population: Residents 10,713
Total Daytime Population (TDP) 23,412
Ratio TDP/Total Population1 1.16
Population in Households 20,176
Population in Familes 16,065
Population in Group Qrtrs 93
Population Density2 1,426
Diversity Index3 28


Median Household Income $50,975
Average Household Income $61,272
Per Capita Income $26,866


Total Housing Units 9,581 (100%)
Owner Occupied HU 6,737 (70.3%)
Renter Occupied HU 2,117 (22.1%)
Vacant Housing Units 727 ( 7.6%)
Median Home Value $89,317
Average Home Value $105,982


Total Households 8,854
Average Household Size 2.28
Family Households 5,635
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2017 2017-2022
Population -0.03% 0.04%
Households 0.08% 0.09%
Families -0.06% -0.01%
Median Household Income   1.84%
Per Capita Income   2.77%

West Mifflin, PA - Peer Comparisons by Rank and Percentile

The table below compares West Mifflin to the other 1,762 incorporated cities, towns and CDPs in Pennsylvania by rank and percentile using July 1, 2017 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 30 98th
Population Density # 877 50th
Diversity Index # 362 80th
Median Household Income # 917 48th
Per Capita Income # 799 55th

Additional comparisons and rankings can be made with a VERY EASY TO USE Pennsylvania Census Data Comparison Tool.

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