Borough · Pennsylvania
West Mifflin, Pennsylvania
West Mifflin, borough, in Allegheny County, Pennsylvania. West Mifflin had 18,707 residents on July 1, 2025 by the Census Bureau's estimate, down 4.5% since 2020; the 2020 Census counted 19,589 and the ACS 2020-2024 5-year estimates put it at 19,190 (±43). GEOID 4283512.
Residents, July 2025 estimate
18,707
Census Bureau estimate (no margin published)
2020 Census count: 19,589 · ACS 2020-2024: 19,190 ±43
Median household income
$76,563
±$9,410 (90% margin)
Pennsylvania: $77,971
Median home value
$151,600
±$6,893 (90% margin)
Pennsylvania: $254,500
Median gross rent
$780
±$147 (90% margin)
Pennsylvania: $1,209
Where is West Mifflin and what county is it in?
West Mifflin is a borough in Allegheny County, Pennsylvania. It covers 14.2 square miles of land, 1,378 residents per square mile in 2020.
West Mifflin is in the Pittsburgh, PA metropolitan statistical area, which takes in 8 counties (Census Bureau delineation, July 2023).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in West Mifflin, and is it growing?
The Census Bureau estimates that 18,707 people lived in West Mifflin on July 1, 2025, down 4.5% since 2020, while Pennsylvania grew 0.4%. The 2020 Census counted 19,589 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 19,190 (±43).
| Measure | West Mifflin | Allegheny County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 19,190 ±43 | 1,238,177 | −644 |
| Households | 8,286 ±536 | 545,802 | no clear change |
| Average household size | 2.30 ±0.15 | 2.20 | no clear change |
| Housing units | 8,972 ±542 | 606,827 | −690 |
West Mifflin's population since 2000
From 22,464 in 2000 to 18,707 in 2025: down 16.7%. The 2000, 2010 and 2020 figures are census counts, each for West Mifflin as it was drawn that year: a place that annexed land, or a community that has since incorporated, covered a different area then. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in West Mifflin?
The median resident of West Mifflin is 43.4 years old; 21.2% are under 18 and 19.9% are 65 or older. The largest group is non-Hispanic white residents at 83.8%, then non-Hispanic Black residents at 7.3%. 1.9% of residents were born outside the United States.
| Measure | West Mifflin | Allegheny County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 43.4 ±2.7 | 40.6 | no clear change |
| Under 18 years | 21.2% ±3.2 pts | 18.6% | – |
| 65 years and over | 19.9% ±2.0 pts | 20.2% | – |
| Male | 50.9% ±2.6 pts | 48.8% | – |
| Hispanic or Latino (any race) | 3.1% ±2.5 pts | 3.0% | – |
| White alone, not Hispanic | 83.8% ±4.1 pts | 75.5% | no clear change |
| Black or African American alone, not Hispanic | 7.3% ±2.3 pts | 12.4% | no clear change |
| Asian alone, not Hispanic | 0.9% ±0.8 pts | 4.3% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.1 pts | 0.1% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.2 pts | 0.0% | – |
| Two or more races, not Hispanic | 4.8% ±2.1 pts | 4.3% | – |
| Some other race alone, not Hispanic | 0.0% ±0.2 pts | 0.5% | – |
| Born outside the United States | 1.9% ±1.2 pts | 6.6% | no clear change |
| Speak a language other than English at home (age 5+) | 6.7% ±4.0 pts | 8.5% | – |
| Civilian veterans (age 18+) | 6.8% ±1.5 pts | 5.7% | – |
| With a disability | 14.9% ±2.1 pts | 13.9% | – |
| No health insurance coverage | 3.6% ±1.4 pts | 3.8% | no clear change |
| High school graduate or higher (age 25+) | 94.1% ±2.2 pts | 95.7% | – |
| Bachelor's degree or higher (age 25+) | 24.5% ±3.1 pts | 45.8% | no clear change |
| Graduate or professional degree (age 25+) | 8.2% ±1.9 pts | 19.3% | – |
| Lived in the same house a year earlier | 95.3% ±1.6 pts | 87.9% | – |
| Moved from another state in the past year | 0.8% ±0.7 pts | 2.3% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in West Mifflin earn?
Half of West Mifflin's 8,286 households earn less than $76,563 a year (±$9,410), against $78,548 in Allegheny County and $77,971 in Pennsylvania. In 2015-2019 the median was $64,832 in 2024 dollars, so it rose by $11,731 after inflation. 11.2% of residents live below the poverty line.
| Measure | West Mifflin | Allegheny County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $76,563 ±$9,410 | $78,548 | +$11,731 |
| Mean household income | $86,006 ±$4,432 | $110,063 | – |
| Per capita income | $37,627 ±$2,376 | $49,588 | no clear change |
| People below the poverty line | 11.2% ±3.1 pts | 11.5% | no clear change |
| Children under 18 below the poverty line | 19.3% ±11.0 pts | 14.9% | no clear change |
| Households receiving SNAP | 18.1% ±3.9 pts | 13.0% | – |
| Households with a computer | 94.6% ±1.8 pts | 94.0% | – |
| Households with a broadband subscription | 89.9% ±2.5 pts | 90.8% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in West Mifflin?
Owners occupy 79.9% of West Mifflin's occupied homes and renters 20.1%. The median owner-occupied home is valued at $151,600 by its owner (±$6,893). The median renter pays $780 a month including utilities, and 34.6% of renters pay 35% or more of their income on rent.
| Measure | West Mifflin | Allegheny County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $151,600 ±$6,893 | $227,600 | +$29,761 |
| Median gross rent | $780 ±$147 | $1,153 | no clear change |
| Renters paying 35% or more of income on rent | 34.6% ±11.6 pts | 37.4% | no clear change |
| Median monthly owner costs, with a mortgage | $1,347 ±$74 | $1,685 | – |
| Owner-occupied homes | 79.9% ±3.1 pts | 65.2% | no clear change |
| Renter-occupied homes | 20.1% ±3.1 pts | 34.8% | – |
| Housing units | 8,972 ±542 | 606,827 | −690 |
| Homeowner vacancy rate | 0.9% ±0.7 pts | 0.9% | – |
| Rental vacancy rate | 2.8% ±3.4 pts | 6.8% | – |
| Single-family detached homes | 82.5% ±3.0 pts | 61.6% | – |
| Mobile homes | 2.7% ±1.6 pts | 0.7% | – |
| Built 2020 or later | 0.3% ±0.3 pts | 0.8% | – |
| Built 2010 to 2019 | 0.7% ±0.5 pts | 4.8% | – |
| Built 1939 or earlier | 13.4% ±3.3 pts | 28.1% | – |
| Households with no vehicle | 10.3% ±2.6 pts | 11.9% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How many new homes is West Mifflin building?
Builders took permits for 0 new housing units in West Mifflin in 2025 (0 in single-family houses; the permit office reported 9 of 12 months), 0.0 per 1,000 residents against 2.0 across Pennsylvania.
Counts of units in permits a local office issued; not every permitted unit is built. A year marked with months was reported for part of the year.
Source: Building Permits Survey, annual place files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in West Mifflin work and get to work?
69.4% of West Mifflin's workers drive alone and 15.3% work from home. The average trip to work takes 26.1 minutes. The unemployment rate in 2020-2024 averaged 8.2%.
| Measure | West Mifflin | Allegheny County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 65.8% ±3.2 pts | 64.8% | – |
| Unemployment rate | 8.2% ±3.1 pts | 5.0% | no clear change |
| Drove alone to work | 69.4% ±3.9 pts | 61.9% | – |
| Carpooled | 10.6% ±2.6 pts | 6.3% | – |
| Public transportation | 3.7% ±1.6 pts | 5.4% | – |
| Walked | 0.6% ±0.5 pts | 3.5% | – |
| Worked from home | 15.3% ±2.6 pts | 21.1% | +13.0 pts |
| Mean travel time to work | 26.1 min ±2.3 | 25.2 min | −4.3 min |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in West Mifflin?
6 census tracts lie mostly in West Mifflin (2020 census blocks). Their median household incomes run from $57,257 (Tract 4884) to $96,902 (Tract 4886).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 4886Allegheny County | 4,573 | $96,902 |
| Tract 4884Allegheny County | 4,361 | $57,257 |
| Tract 4882Allegheny County | 3,590 | $61,447 |
| Tract 4885Allegheny County | 2,604 | $80,847 |
| Tract 4881Allegheny County | 2,137 | $67,964 |
| Tract 4883Allegheny County | 1,925 | $81,071 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in West Mifflin) · Census block assignment files
How does West Mifflin compare with other places in Pennsylvania?
By the Census Bureau's July 2025 estimates, West Mifflin is the 2,045th-most populous of the 19,476 U.S. incorporated places that have one and the 32nd-most populous of 1,012 in Pennsylvania.
West Mifflin ranks 1,093rd of 2,136 places in Pennsylvania with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 32nd | 1,012 |
| Growth 2020-2025 (PEP) | 1,661st | 1,764 |
| Residents per square mile | 826th | 2,159 |
| Median household income | 1,093rd | 2,136 |
| Per capita income | 1,239th | 2,157 |
| Median home value | 1,749th | 2,146 |
| Median gross rent | 1,657th | 1,963 |
| Poverty rate | 604th | 1,606 |
| Bachelor's degree or higher | 1,138th | 2,129 |
| Median age | 1,150th | 2,157 |
| Owner-occupied share | 1,124th | 2,149 |
| Work from home | 588th | 1,710 |
| Travel time to work | 1,020th | 2,156 |
West Mifflin's figures with every place in Pennsylvania (CSV)
Every place in Pennsylvania, sortable · Compare West Mifflin with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for West Mifflin?
11 of the 57 figures for West Mifflin on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for West Mifflin are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' public schools in West Mifflin.