West Mifflin, Pennsylvania demographics

West Mifflin, PA demographics: median age 43.4; 24.5% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · West Mifflin borough, Pennsylvania · Incorporated borough · GEOID 4283512. The survey estimates a population of 19,190 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in West Mifflin is 43.4 years, with a 90% margin of error of 2.7 years. There are 8,286 households (±536). Age and household distributions show how these totals are composed; they do not establish which neighborhood suits a particular person.

Every count and share is an estimate. “±” is a 90% margin of error (MOE); pp means percentage points. Derived shares use the category count divided by the named universe. Aggregated category MOEs and percentage MOEs are approximate. A margin larger than half its estimate is flagged as low precision. Blank source uncertainty is shown as unavailable, never zero.

Age distribution and sex

City, state and U.S. estimates · ACS 2020–2024
Measure / survey universe	City estimate ± MOE	State estimate ± MOE	U.S. estimate ± MOE
Median age Total population · years	43.4 ±2.7	40.9 ±0.2	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 19,190
Category	Count ± MOE	Share ± MOE (pp)	Pennsylvania	U.S.
Under 18	4,069 ±733	21.2% ±3.8 pp	20.4%	22.0%
18–34	3,636 ±462	18.9% ±2.4 pp	21.9%	22.8%
35–64	7,666 ±692	39.9% ±3.6 pp	38.1%	38.0%
65 and older	3,819 ±369	19.9% ±1.9 pp	19.5%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 19,190
Category	Count ± MOE	Share ± MOE (pp)	Pennsylvania	U.S.
Male	9,762 ±492	50.9% ±2.6 pp	49.3%	49.5%
Female	9,428 ±496	49.1% ±2.6 pp	50.7%	50.5%

The age groups are mutually exclusive and cover the entire population. The sex categories follow this ACS table’s published classification; they are not a survey of gender identity.

Race and Hispanic origin

Race · B02001 · ACS 2020–2024 Total population: 19,190
Category	Count ± MOE	Share ± MOE (pp)	Pennsylvania	U.S.
White alone	16,253 ±738	84.7% ±3.8 pp	74.5%	61.0%
Black or African American alone	1,688 ±612	8.8% ±3.2 pp	10.6%	12.2%
American Indian and Alaska Native alone	28 ±30 · low precision	0.1% ±0.2 pp · low precision	0.2%	0.9%
Asian alone	176 ±161 · low precision	0.9% ±0.8 pp · low precision	3.8%	6.0%
Native Hawaiian and Other Pacific Islander alone	0 ±19 · low precision	0.0% ±0.1 pp · low precision	0.0%	0.2%
Some other race alone	35 ±39 · low precision	0.2% ±0.2 pp · low precision	3.7%	7.1%
Two or more races	1,010 ±396	5.3% ±2.1 pp	7.1%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 19,190
Category	Count ± MOE	Share ± MOE (pp)	Pennsylvania	U.S.
Not Hispanic or Latino	18,587 ±481	96.9% ±2.5 pp	91.3%	80.7%
Hispanic or Latino	603 ±480 · low precision	3.1% ±2.5 pp · low precision	8.7%	19.3%

Hispanic origin and race are separate questions. People of Hispanic or Latino origin may be of any race and appear in both tables. Do not add the Hispanic share to race shares. Race alone and two-or-more-race groups are the mutually exclusive categories of the race table.

Household types, children and living alone

Household types · B11001 · ACS 2020–2024 Households: 8,286
Category	Count ± MOE	Share ± MOE (pp)	Pennsylvania	U.S.
Married-couple family	3,624 ±287	43.7% ±2.0 pp	46.2%	46.9%
Other family: male householder, no spouse present	290 ±151 · low precision	3.5% ±1.8 pp · low precision	4.7%	5.1%
Other family: female householder, no spouse present	786 ±225	9.5% ±2.6 pp	11.5%	12.2%
Nonfamily: householder living alone	3,038 ±520	36.7% ±5.8 pp	30.9%	28.7%
Nonfamily: householder not living alone	548 ±176	6.6% ±2.1 pp	6.7%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 8,286
Category	Count ± MOE	Share ± MOE (pp)	Pennsylvania	U.S.
Households with people under 18	1,962 ±221	23.7% ±2.2 pp	27.0%	29.5%
Households without people under 18	6,324 ±651	76.3% ±6.1 pp	73.0%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 8,286
Category	Count ± MOE	Share ± MOE (pp)	Pennsylvania	U.S.
One-person nonfamily households	3,038 ±520	36.7% ±5.8 pp	30.9%	28.7%
Two-person households	2,424 ±297	29.3% ±3.0 pp	34.7%	33.8%
Three-person households	1,385 ±273	16.7% ±3.1 pp	14.9%	15.3%
Four-person households	810 ±245	9.8% ±2.9 pp	11.7%	12.6%
Five-person households	511 ±240	6.2% ±2.9 pp	5.0%	5.9%
Six-person households	118 ±79 · low precision	1.4% ±1.0 pp · low precision	1.7%	2.2%
Seven or more people	0 ±27 · low precision	0.0% ±0.3 pp · low precision	1.1%	1.4%

A family household contains related people under the Census definition. A nonfamily household can contain one person or unrelated people sharing a home. Households with children can also appear in the household-type and size tables, so those tables must not be added together. Household estimates exclude people living in group quarters from the household universe.

Nativity and languages spoken at home

Nativity · B05002 · ACS 2020–2024 Total population: 19,190
Category	Count ± MOE	Share ± MOE (pp)	Pennsylvania	U.S.
Native	18,818 ±227	98.1% ±1.2 pp	92.3%	85.9%
Foreign born	372 ±221 · low precision	1.9% ±1.2 pp · low precision	7.7%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 18,371
Category	Count ± MOE	Share ± MOE (pp)	Pennsylvania	U.S.
English only	17,148 ±765	93.3% ±3.8 pp	87.6%	77.7%
Spanish	658 ±716 · low precision	3.6% ±3.9 pp · low precision	5.6%	13.6%
French, Haitian, or Cajun	11 ±12 · low precision	0.1% ±0.1 pp · low precision	0.5%	0.7%
German or other West Germanic	42 ±38 · low precision	0.2% ±0.2 pp · low precision	0.9%	0.5%
Russian, Polish, or other Slavic	65 ±52 · low precision	0.4% ±0.3 pp · low precision	0.8%	0.7%
Other Indo-European	209 ±141 · low precision	1.1% ±0.8 pp · low precision	1.7%	2.0%
Korean	0 ±19 · low precision	0.0% ±0.1 pp · low precision	0.2%	0.3%
Chinese, including Mandarin and Cantonese	0 ±19 · low precision	0.0% ±0.1 pp · low precision	0.8%	1.1%
Vietnamese	0 ±19 · low precision	0.0% ±0.1 pp · low precision	0.3%	0.5%
Tagalog, including Filipino	0 ±19 · low precision	0.0% ±0.1 pp · low precision	0.2%	0.6%
Other Asian and Pacific Island	163 ±215 · low precision	0.9% ±1.2 pp · low precision	0.7%	1.1%
Arabic	28 ±35 · low precision	0.2% ±0.2 pp · low precision	0.4%	0.5%
Other and unspecified	47 ±41 · low precision	0.3% ±0.2 pp · low precision	0.5%	0.8%

Foreign born means not a U.S. citizen at birth; it includes naturalized citizens. Language categories describe speech at home among people age five and older. A language other than English at home does not establish that someone cannot speak English. This city page uses the published C16001 summary categories because the more detailed B16001 table does not provide these city records in this release.

Educational attainment

Highest completed education · B15003 · ACS 2020–2024 Population age 25 and older: 13,803
Category	Count ± MOE	Share ± MOE (pp)	Pennsylvania	U.S.
Less than high school graduate	821 ±277	5.9% ±2.0 pp	7.9%	10.4%
High school graduate or equivalency	5,031 ±480	36.4% ±3.1 pp	32.9%	26.0%
Some college, no degree	2,670 ±345	19.3% ±2.3 pp	15.1%	19.1%
Associate’s degree	1,893 ±324	13.7% ±2.3 pp	8.9%	8.8%
Bachelor’s degree	2,259 ±351	16.4% ±2.4 pp	20.9%	21.6%
Graduate or professional degree	1,129 ±251	8.2% ±1.8 pp	14.3%	14.1%

The denominator excludes residents under 25. Each person is counted in the highest attainment category they completed. This table does not measure the quality of local schools or the education level of every current student.

Residence one year earlier

Geographic mobility · B07003 · ACS 2020–2024 Population age 1 and older: 19,040
Category	Count ± MOE	Share ± MOE (pp)	Pennsylvania	U.S.
Same house	18,145 ±330	95.3% ±1.7 pp	89.3%	87.7%
Moved within same county	655 ±266	3.4% ±1.4 pp	5.6%	6.3%
Moved from a different county in the same state	59 ±36 · low precision	0.3% ±0.2 pp · low precision	2.6%	3.1%
Moved from a different state	151 ±137 · low precision	0.8% ±0.7 pp · low precision	1.9%	2.3%
Moved from abroad	30 ±37 · low precision	0.2% ±0.2 pp · low precision	0.4%	0.6%

These are respondents’ residence patterns one year before their survey response, pooled across the five-year window. They are not a net migration count for 2025. A person can move to a different house within the same city or county; moves within the same county should not automatically be interpreted as new arrivals to the city.

Health insurance, internet access and veterans

3.6% of West Mifflin residents (±1.5 percentage points) had no health insurance coverage when surveyed, compared with 5.6% in Pennsylvania and 8.4% nationally. 89.9% of households subscribe to broadband of any type, including cellular data plans. A subscription is not the same as available service: the FCC National Broadband Map shows providers at a specific address.

City, state and U.S. shares · ACS 2020–2024
Measure	West Mifflin	Pennsylvania	U.S.	Compared with Pennsylvania
People without health insurance Civilian noninstitutionalized population	3.6% ±1.5 pp	5.6%	8.4%	Lower
Households with a broadband subscription Households	89.9% ±8.2 pp	89.7%	91.0%	Not statistically different
Veterans Civilian population age 18 and older	6.8% ±1.5 pp	6.1%	6.2%	Not statistically different

Reading and reusing the estimates

The Census table links above lead to the original detailed tables. Counts, source universes and uncertainty are retained in the source observation download for West Mifflin . Compare these figures with the same survey window; do not compare one city’s five-year estimate with another city’s annual estimate as though they measured the same period. For methods, see uncertainty and denominator calculations.

Read West Mifflin housing and cost context or return to the city profile.