Mount Oliver, PA

Borough in Allegheny County, PA, US

By Neilsberg Research

Last updated May 1, 2026

Key Indicators

A quick look at key numbers

Population

3,319

Source: U.S. Census Bureau American Community Survey (ACS) 2020-2024 5-Year Estimates

Median Age

36.1

years ∙ half population younger than 36.1, half older

Diversity Index

61.3%

chance two random people differ in race and ethnicity

Nativity

10.1%

foreign-born population

89.9%Native

10.1% Foreign-born

Geographic Context

Location, size, and surroundings

About

Mount Oliver is a borough within Allegheny County, Pennsylvania, United States.

Location

Borough in Allegheny County, PA, US

Co-ordinates

DEC40.411274° N, 79.985639° W

DMS40° 24′ 40.59″ N, 79° 59′ 08.30″ W

Population Density & area

9,762/sq mi (3,776/km²)

Total Area

0.34 sq mi (0.879 km²)

Land Area

0.34 sq mi (0.879 km²) · 100%

Water Area

0 sq mi (0 km²) · 0%

Demographics & Living

Who lives here, how households are formed, and community composition

Population Composition

Key characteristics of the population

Sex Distribution

48% male

Male 48%

Female 52%

males per 100 females

Mount Oliver 92.4

Allegheny County 95.3

Pennsylvania 97.2

Nativity

10.1%

foreign-born population

89.9%Native

10.1% Foreign-born

% Foreign-born

Mount Oliver 10.1%

Allegheny County 6.6%

Pennsylvania 7.7%

Age Distribution

How the population is spread across age groups

Median Age

36.1

years ∙ half population younger than 36.1, half older

Mount Oliver

36.1

Allegheny County

40.6

Pennsylvania

40.9

Dependency ratio

dependents per 100 working-age adults

Mount Oliver 69

Allegheny County 63.3

Pennsylvania 66.4

AGE DISTRIBUTION

Distribution of age group

Median age

	Mount Oliver	Allegheny County	Pennsylvania
Age Group
Children (Under 18)	32.4%	18.6%	20.4%
Working age (18-64)	59.2%	61.2%	60.1%
Senior (65+)	8.4%	20.2%	19.5%
Dependency ratio
Total dependency ratio	69	63.3	66.4
Child dependency ratio	54.8	30.4	34
Old-age dependency ratio	14.2	33	32.4

Racial & Ethnic Composition

Racial and ethnic makeup and how it compares

Race & Ethnicity

White

48.1%

Black

38.8%

Asian

0.7%

Hispanic

3.8%

Other

8.6%

Note: White, Black, and Asian refer to individuals belonging to a single race and not of Hispanic origin. Hispanics may be of any race.

Diversity Index

61.3%

chance two random people differ in race and ethnicity

Mount Oliver 61.3%

Allegheny County 41%

Pennsylvania 44.6%

Note: The Diversity Index (DI), based on the Blau Index, measures the probability that two randomly selected individuals differ in race and ethnicity. Values range from 0 (no diversity) to 1 (high diversity) and are shown as percentages.

RACIAL & ETHNIC COMPOSITION

Race & Ethnicity

Percentage of Mount Oliver population

	Mount Oliver	Allegheny County	Pennsylvania
Hispanic or Latino	3.8%	3%	8.7%
Mexican	0.5%	1%	1.4%
Puerto Rican	2.2%	0.6%	3.7%
Cuban	0.3%	0.1%	0.2%
Other Hispanic / Latino	0.8%	1.3%	3.4%
Not Hispanic or Latino	96.2%	97%	91.3%
One race	90.4%	92.7%	87.7%
White	48.1%	75.5%	73%
Black or African American	38.8%	12.4%	10.3%
American Indian and Alaska Native	0%	0.1%	0.1%
Asian	0.7%	4.3%	3.8%
Native Hawaiian and Other Pacific Islander	0%	0%	0%
Some Other Race	2.7%	0.5%	0.5%
Two or more races (Multiracial)	5.8%	4.3%	3.6%

Household & Families Composition

Household size, type, and family structure

Household structure

55% family

Family 55%

Non family 45%

% family households

Mount Oliver 55%

Allegheny County 55.4%

Pennsylvania 62.4%

Average household size

2.77

persons per household

Mount Oliver

2.77

Allegheny County

2.2

Pennsylvania

2.39

Household & Family COMPOSITION

Households

Percentage of Mount Oliver population

	Mount Oliver	Allegheny County	Pennsylvania
Total households	1,199	545,802	5,274,853
Average houshold size	2.77	2.2	2.39
Family households	659	302,270	3,291,192
Average family size	3.74	2.92	3.01
Married couple family	310	225,008	2,437,812
Other families	349	77,262	853,380
Male householder	166	19,850	246,246
Female householder	183	57,412	607,134
Non-family households	540	243,532	1,983,661
One-person households	460	200,796	1,629,974
Male householder	275	90,645	733,485
Senior (65+) living alone	27	27,423	246,162
Female householder	185	110,151	896,489
Senior (65+) living alone	76	55,733	477,851
Other living arrangements	80	42,736	353,687

Housing Profile

Housing stock, ownership, rentals, and cost burdens

Total housing units

1,489

housing units

Mount Oliver 1,489

Allegheny County 606,827

Pennsylvania 5,806,452

Occupancy status

80.5% occupied

Occupied 80.5%

Vacant 19.5%

vacancy rate

Mount Oliver 19.5%

Allegheny County 10.1%

Pennsylvania 9.2%

Housing Characteristics

How the housing supply is structured and used

Types of Housing unit

77.4%

Single family houses

77.4%

Apartments in multi-unit structures

22.3%

Mobile homes

0.3%

Boat, RV, van, etc

Median Year Built

1940

Half of houses were built before 1940, and half after.

Historic ∙ 1939 or earlier

54.2%

Postwar & mid-century ∙ 1940 - 1969

32.6%

Late 20th century ∙ 1970 - 1999

10.8%

Modern ∙ 2000 or later

2.4%

Note: Median year built reflects occupied units only; distribution includes all units.

Housing Characteristics

Units, rooms & bedrooms

Physical characteristics of housing units

	Mount Oliver	Allegheny County	Pennsylvania
Rooms per unit
Median rooms	5.9	5.9	6
1–3 rooms	13.2%	14.1%	11.7%
4–6 rooms	53.1%	48.7%	47.7%
7+ rooms	33.8%	37.3%	40.7%
Bedrooms
No bedroom / studio	0%	2.5%	2.3%
1 bedroom	12.6%	13.8%	10.4%
2 bedrooms	34.3%	26.2%	22.5%
3 bedrooms	27.8%	37.6%	42.3%
4+ bedrooms	25.4%	19.9%	22.6%
At a glance
Median year built	1940	1958	1966
Total housing units	1,489	606,827	5,806,452

Occupancy Profile

Who is inside and how they use it

Homeownership

40.5% owners

Renter-occupied 59.5%

Owner-occupied 40.5%

homeownership rate

Mount Oliver 40.5%

Allegheny County 65.2%

Pennsylvania 69.3%

Average household size

2.08

Owner-occupied

3.24

Renter-occupied

owner-occupied average size

Mount Oliver 2.08

Allegheny County 2.39

Pennsylvania 2.53

Housing Characteristics

Occupied unit characteristics

Tenure, crowding, and utilities

	Mount Oliver	Allegheny County	Pennsylvania
Total occupied units	1,199	545,802	5,274,853
Year moved in
2020 or later	28.5%	22.3%	20.2%
2010 to 2019	36.6%	36.1%	36.1%
2000 to 2009	18.1%	15.5%	17.5%
1999 or earlier	16.9%	26.2%	26.2%
Occupants per room
1.00 or fewer	98.6%	99%	98.4%
1.01 to 1.50	0%	0.6%	1%
1.51 or more	1.4%	0.4%	0.6%
Vehicles availability
No vehicles	35%	11.9%	10.4%
1 vehicle	41.3%	40.5%	35.1%
2 vehicles	18.3%	35%	35.9%
3 or more vehicles	5.4%	12.6%	18.6%
House heating fuel used
Gas	81%	82%	56.4%
Electricity	18.5%	16.1%	25.3%
Solar	0%	0.1%	0.1%
Fuel oil, kerosene etc	0.4%	1%	14%
All other fuels	0%	0.5%	3.7%
No fuel used	0%	0.4%	0.5%
Selected characteristics
Lacking complete plumbing	0%	0.3%	0.4%
Lacking complete kitchen	1.3%	0.8%	0.8%
No telephone service available	1.4%	0.7%	0.9%

Housing Value

What owner-occupied units are worth

Median home value

$96,900

owner-occupied units

Median value(USD)

Mount Oliver

$96,900

Allegheny County

$227,600

Pennsylvania

$254,500

Housing Cost Burden

28.7%

of homeowners with a mortgage are cost-burdened

% Cost-Burdened Households

Owners with a mortgage

28.7%

Owners without a mortgage

Renters

61.2%

Note: Households spending 30% or more of their income on housing costs are considered cost-burdened.

Financial characteristics

Property value and housing costs

Tenure, crowding, and utilities

	Mount Oliver	Allegheny County	Pennsylvania
Property value
Median Value	$96,900	$227,600	$254,500
Under $100,000	53.1%	15.8%	13.9%
$100,000 - $200,000	38.7%	26.3%	22.4%
$200,000 - $300,000	0%	24.1%	22.9%
$300,000 - $500,000	8.2%	22.4%	25.9%
$500,000 - $1,000,000	0%	9.7%	12.8%
$1,000,000 and more	0%	1.7%	2.1%
Owner-occupied households
With a mortgage	48.8%	57.5%	58%
Without a mortgage	51.2%	42.5%	42%
Median monthly owner costs
With a mortgage	$895	$1,685	$1,762
Without a mortgage	$629	$654	$644
Gross rent
Median rent	$1,302	$1,153	$1,209

Education Profile

How educated is the community and how education pays off

Adults with a college degree

17.5%

of adults 25+ with a bachelor's degree or higher

Mount Oliver 17.5%

Allegheny County 45.8%

Pennsylvania 35.2%

Adults without a high school diploma

11%

of adults (25+) without a high school diploma

Mount Oliver 11%

Allegheny County 4.4%

Pennsylvania 7.9%

School Enrollment

Who is enrolled in school and at what level

School enrollment

1,167

population (age 3+) enrolled in school

Nursery / Preschool

5.5%

K–12

80.7%

College / Undergraduate

8.1%

Graduate / Professional

5.7%

College-going rate (18-24 yr olds)

51.4%

of 18-24-year-olds in college or graduate school

Mount Oliver

51.4%

Allegheny County

52.3%

Pennsylvania

44%

Enrollment & school type

Enrollment levels, college-going rate, and public vs private school split

Population 3+ currently enrolled in a school

	Mount Oliver	Allegheny County	Pennsylvania
Total enrolled (age 3+)	1,167	271,864	2,913,513
Nursery / preschool	5.5%	5.9%	5.7%
K–12	80.7%	61.5%	66.9%
Kindergarten	2.4%	4.9%	4.8%
Elementary: Grades 1–4	23.6%	18.8%	19.7%
Elementary: Grades 5–8	31%	18.5%	20.7%
High School: Grades 9–12	23.7%	19.3%	21.7%
College or graduate school	13.8%	32.6%	27.4%
College, undergraduate	8.1%	23.4%	21.2%
Graduate, professional school	5.7%	9.2%	6.2%
College-going rate · 18-24 yr olds	51.4%	52.3%	44%
School type
Public school	81.5%	75.6%	75.3%
Private school	18.5%	24.4%	24.7%

Education Attainment by Level & Gender

What is the highest level of education completed among adults

Education attainment

2,069

population 25 years and over

Total adults (25+)

Less than 9th grade

4.9%

9th-12th, no diploma

6.1%

HS graduate

38.1%

Some college no degree

18.1%

Associates degree

15.2%

Bachelors degree

10.6%

Graduate or professional degree

6.9%

Attainment by gender

Male vs Female

Adults (25+) · Share within each education level

% male · % female

Less than 9th grade

100% · 0%

9th-12th, no diploma

13.4% · 86.6%

HS graduate

52.3% · 47.7%

Some college no degree

54.3% · 45.7%

Associates degree

43.5% · 56.5%

Bachelors degree

57.7% · 42.3%

Graduate or professional degree

69.9% · 30.1%

Educational Attainment Overview

Distribution and key education attainment rates for adults (25+)

Highest credential completed · adults 25+

	Mount Oliver	Allegheny County	Pennsylvania
Population (25+)	2,069	899,968	9,189,697
Less than 9th grade	4.9%	1.5%	2.9%
9th–12th, no diploma	6.1%	2.9%	5%
High school diploma or GED	38.1%	25.2%	32.9%
Some college, no degree	18.1%	14.8%	15.1%
Associate's degree	15.2%	9.9%	8.9%
Bachelor's degree or higher	17.5%	45.8%	35.2%
Bachelor's degree	10.6%	26.4%	20.9%
Graduate or professional	6.9%	19.3%	14.3%
High School or higher	89%	95.7%	92.1%

Earnings by education level

percentage as applicable

Median Earnings

$34,481

Median earnings for adults 25+, by level

Less than HS graduate

$33,351

HS graduate

$26,651

Some college or associates

$34,102

Bachelors degree

$65,054

Graduate or professional degree

$65,625

Poverty Rate

for ages 25+, with bachelors degree or higher

Less than HS graduate

7.9%

HS graduate

23.3%

Some college or associates

15.4%

Bachelors degree or higher

Outcomes by Education Level

Earnings and poverty rates across education levels (25+)

Adults 25+

	Mount Oliver	Allegheny County	Pennsylvania
Median earnings
Population 25+, with earnings	$34,481	$57,377	$53,549
Less than high school graduate	$33,351	$30,069	$33,591
High school graduate (includes equivalency)	$26,651	$38,876	$40,643
Some college or associate's degree	$34,102	$46,794	$47,736
Bachelor's degree	$65,054	$68,256	$69,335
Graduate or professional degree	$65,625	$86,164	$87,132
Poverty rates
Less than high school graduate	7.9%	29.5%	25.2%
High school graduate (includes equivalency)	23.3%	14.9%	13.3%
Some college or associate's degree	15.4%	10.5%	9.1%
Bachelor's degree or higher	0%	4.2%	4.1%

Insights for Mount Oliver, by topic

Income By year By race By age By gender

Population By year By race By age By gender

About Neilsberg Research

Neilsberg Research team are data scientists with expertise in processing, analysis and visualization of big data helping small businesses make right decisions.

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