Mount Oliver, Pennsylvania demographics

Mount Oliver, PA demographics: median age 36.1; 17.5% of adults 25+ hold a bachelor’s degree. Age, race, households, languages and education, ACS 2020–2024 with margins of error.

ACS 2020–2024 · Mount Oliver borough, Pennsylvania · Incorporated borough · GEOID 4251744. The survey estimates a population of 3,319 for its five-year window. This is separate from the annual July 2025 population estimate on the city overview.

Median age in Mount Oliver is 36.1 years, with a 90% margin of error of 5.5 years. There are 1,199 households (±204). 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	36.1 ±5.5	40.9 ±0.2	38.9 ±0.1

Age groups · B01001 · ACS 2020–2024 Total population: 3,319
Category	Count ± MOE	Share ± MOE (pp)	Pennsylvania	U.S.
Under 18	1,077 ±334	32.4% ±10.0 pp	20.4%	22.0%
18–34	575 ±219	17.3% ±6.6 pp	21.9%	22.8%
35–64	1,389 ±287	41.8% ±8.6 pp	38.1%	38.0%
65 and older	278 ±109	8.4% ±3.3 pp	19.5%	17.2%

Sex categories as published by ACS · B01001 · ACS 2020–2024 Total population: 3,319
Category	Count ± MOE	Share ± MOE (pp)	Pennsylvania	U.S.
Male	1,594 ±263	48.0% ±7.9 pp	49.3%	49.5%
Female	1,725 ±265	52.0% ±8.0 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: 3,319
Category	Count ± MOE	Share ± MOE (pp)	Pennsylvania	U.S.
White alone	1,612 ±410	48.6% ±12.3 pp	74.5%	61.0%
Black or African American alone	1,300 ±403	39.2% ±12.1 pp	10.6%	12.2%
American Indian and Alaska Native alone	0 ±12 · low precision	0.0% ±0.4 pp · low precision	0.2%	0.9%
Asian alone	23 ±36 · low precision	0.7% ±1.1 pp · low precision	3.8%	6.0%
Native Hawaiian and Other Pacific Islander alone	0 ±12 · low precision	0.0% ±0.4 pp · low precision	0.0%	0.2%
Some other race alone	191 ±266 · low precision	5.8% ±8.0 pp · low precision	3.7%	7.1%
Two or more races	193 ±140 · low precision	5.8% ±4.2 pp · low precision	7.1%	12.6%

Hispanic or Latino origin · B03003 · ACS 2020–2024 Total population: 3,319
Category	Count ± MOE	Share ± MOE (pp)	Pennsylvania	U.S.
Not Hispanic or Latino	3,192 ±132	96.2% ±3.9 pp	91.3%	80.7%
Hispanic or Latino	127 ±130 · low precision	3.8% ±3.9 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: 1,199
Category	Count ± MOE	Share ± MOE (pp)	Pennsylvania	U.S.
Married-couple family	310 ±121	25.9% ±9.1 pp	46.2%	46.9%
Other family: male householder, no spouse present	166 ±116 · low precision	13.8% ±9.4 pp · low precision	4.7%	5.1%
Other family: female householder, no spouse present	183 ±108 · low precision	15.3% ±8.6 pp · low precision	11.5%	12.2%
Nonfamily: householder living alone	460 ±201	38.4% ±15.4 pp	30.9%	28.7%
Nonfamily: householder not living alone	80 ±56 · low precision	6.7% ±4.5 pp · low precision	6.7%	7.0%

Households with children · B11005 · ACS 2020–2024 Households: 1,199
Category	Count ± MOE	Share ± MOE (pp)	Pennsylvania	U.S.
Households with people under 18	343 ±73	28.6% ±3.7 pp	27.0%	29.5%
Households without people under 18	856 ±248	71.4% ±16.7 pp	73.0%	70.5%

Household size · B11016 · ACS 2020–2024 Households: 1,199
Category	Count ± MOE	Share ± MOE (pp)	Pennsylvania	U.S.
One-person nonfamily households	460 ±201	38.4% ±15.4 pp	30.9%	28.7%
Two-person households	313 ±138	26.1% ±10.6 pp	34.7%	33.8%
Three-person households	140 ±90 · low precision	11.7% ±7.2 pp · low precision	14.9%	15.3%
Four-person households	91 ±63 · low precision	7.6% ±5.1 pp · low precision	11.7%	12.6%
Five-person households	103 ±115 · low precision	8.6% ±9.4 pp · low precision	5.0%	5.9%
Six-person households	75 ±60 · low precision	6.3% ±4.9 pp · low precision	1.7%	2.2%
Seven or more people	17 ±30 · low precision	1.4% ±2.5 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: 3,319
Category	Count ± MOE	Share ± MOE (pp)	Pennsylvania	U.S.
Native	2,984 ±215	89.9% ±6.4 pp	92.3%	85.9%
Foreign born	335 ±218 · low precision	10.1% ±6.6 pp · low precision	7.7%	14.1%

Language spoken at home · C16001 · ACS 2020–2024 Population age 5 and older: 3,184
Category	Count ± MOE	Share ± MOE (pp)	Pennsylvania	U.S.
English only	2,749 ±345	86.3% ±10.3 pp	87.6%	77.7%
Spanish	40 ±33 · low precision	1.3% ±1.0 pp · low precision	5.6%	13.6%
French, Haitian, or Cajun	0 ±12 · low precision	0.0% ±0.4 pp · low precision	0.5%	0.7%
German or other West Germanic	32 ±52 · low precision	1.0% ±1.6 pp · low precision	0.9%	0.5%
Russian, Polish, or other Slavic	11 ±18 · low precision	0.3% ±0.6 pp · low precision	0.8%	0.7%
Other Indo-European	42 ±81 · low precision	1.3% ±2.5 pp · low precision	1.7%	2.0%
Korean	23 ±36 · low precision	0.7% ±1.1 pp · low precision	0.2%	0.3%
Chinese, including Mandarin and Cantonese	0 ±12 · low precision	0.0% ±0.4 pp · low precision	0.8%	1.1%
Vietnamese	0 ±12 · low precision	0.0% ±0.4 pp · low precision	0.3%	0.5%
Tagalog, including Filipino	0 ±12 · low precision	0.0% ±0.4 pp · low precision	0.2%	0.6%
Other Asian and Pacific Island	0 ±12 · low precision	0.0% ±0.4 pp · low precision	0.7%	1.1%
Arabic	217 ±297 · low precision	6.8% ±9.3 pp · low precision	0.4%	0.5%
Other and unspecified	70 ±108 · low precision	2.2% ±3.4 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: 2,069
Category	Count ± MOE	Share ± MOE (pp)	Pennsylvania	U.S.
Less than high school graduate	228 ±133 · low precision	11.0% ±6.2 pp · low precision	7.9%	10.4%
High school graduate or equivalency	789 ±250	38.1% ±10.6 pp	32.9%	26.0%
Some college, no degree	374 ±174	18.1% ±7.9 pp	15.1%	19.1%
Associate’s degree	315 ±132	15.2% ±5.9 pp	8.9%	8.8%
Bachelor’s degree	220 ±95	10.6% ±4.3 pp	20.9%	21.6%
Graduate or professional degree	143 ±81 · low precision	6.9% ±3.8 pp · low precision	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: 3,266
Category	Count ± MOE	Share ± MOE (pp)	Pennsylvania	U.S.
Same house	2,597 ±497	79.5% ±15.1 pp	89.3%	87.7%
Moved within same county	405 ±387 · low precision	12.4% ±11.8 pp · low precision	5.6%	6.3%
Moved from a different county in the same state	19 ±32 · low precision	0.6% ±1.0 pp · low precision	2.6%	3.1%
Moved from a different state	173 ±202 · low precision	5.3% ±6.2 pp · low precision	1.9%	2.3%
Moved from abroad	72 ±99 · low precision	2.2% ±3.0 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

10.4% of Mount Oliver residents (±5.8 percentage points) had no health insurance coverage when surveyed, compared with 5.6% in Pennsylvania and 8.4% nationally. 84.8% 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	Mount Oliver	Pennsylvania	U.S.	Compared with Pennsylvania
People without health insurance Civilian noninstitutionalized population	10.4% ±5.8 pp · low precision	5.6%	8.4%	Not statistically different
Households with a broadband subscription Households	84.8% ±3.8 pp	89.7%	91.0%	Lower
Veterans Civilian population age 18 and older	5.7% ±3.6 pp · low precision	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 Mount Oliver . 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 Mount Oliver housing and cost context or return to the city profile.