United States › Pennsylvania › St. Marys CITY · 2020 ACS
St. Marys Pennsylvania · 12,738 residents · 99.3 sq mi
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The short version
With 12,738 people, St. Marys is a city in Pennsylvania. The median age is 48.3, about 9 years above the US median. Four-year degrees are less common here than nationally, at 20% of adults. Getting to work takes 13 minutes on average. 76% of homes are owner-occupied. The foreign-born share is 1%.
At a glance
Lower income
below the US median
US median: $66,278
Older
median age 48.3
US median: 38.8
Less educated
20% hold a bachelor's degree
US average: 33%
More affordable
home values down 9%, inflation adjusted
US median home: $265,253
Section 01
Population & growth from 39.4 in 2000
US average: 38.8
Population, 1990 – 2024
5K 7K 10K 13K 15K 1990 2000 2010 2020 2024 St. Marys Age distribution, 2020
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Section 02
Income & economy $54,950
−12%inflation adjusted, since 2000
from $41,593 in 2000
US average: $66,278
from $19,885 in 2000
US average: $35,364
Households earning $100K+
from 25.1% in 2009
US average: 43.9%
from 4.8% in 2000
US average: 12.8%
Workforce by industry, 2020
Transportation & warehousing 3%
Professional, scientific, technical 2.4%
Education & health services 1.5%
Public administration 1.2%
Agriculture, forestry, fishing 1.1%
Arts, entertainment, food 1.1%
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$120,400
−9%inflation adjusted, since 2000
from $87,900 in 2000
US average: $265,253
$654
−4%inflation adjusted, since 2000
from $454 in 2000
US average: $1,124
from 77.4% in 2000
24.1% rent
2.02 people
−13%since 2009
from 2.32 people in 2009
US average: 2.61
from 2.4 in 2009
Years of local income it takes to buy a local home, on a scale of about 0 to 15. Lower is more affordable.
Section 04
Race & ethnicity 2000
White, non-Hispanic 98.6%(14,299)
Hispanic / Latino 0.3%(44)
2020
White, non-Hispanic 95.4%(12,146)
No data for the years selected.
Section 04 · Origins
Detailed origins & ancestry Ancestry
+ 16 more ancestry groups with data from 15.5% in 2000
US average: 32.9%
High school or higher
from 84.4% in 2000
US average: 88.5%
from 4.9% in 2000
US average: 12.7%
Section 06
Commute & transportation from 10.2 min in 2000
US average: 26.9
from 87.1% in 2009
US average: 75.1%
from 6.9% in 2009
US average: 8.4%
Section 07
Work & employment from 5.7% in 2011
US average: 5.4%
from 62.6% in 2011
US average: 63.4%
Women 20-64 in the labor force
US average: 73.3%
from 26.7% in 2009
US average: 39.3%
Section 08
People & community from 0.4% in 2009
US average: 13.5%
from 6.1% in 2013
US average: 8.8%
Computer in household
US average: 91.9%
Marital status (2024)
Men 15+
Never married 31.6%(1,704)
Women 15+
Never married 21.4%(1,154)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
Section 09
Health coverage from 6.1% in 2013
US average: 8.8%
Direct-purchase
US average: 13.7%
VA health care
US average: 2.3%
Any private
US average: 68.1%
Any public
US average: 35.2%
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans Veterans by period of service, 2020
Gulf War (2001 or later) 13.3%(115)
Gulf War (1990s) 11.8%(102)
Share of the 862 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.
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Drill deeper
Places similar to St. Marys Head to head
Compare St. Marys to nearby cities ST. MARYS VS
Warren
Income $53,815 −2%
Home value $103,800 −14%
Population 9,046 −26%
SEE FULL COMPARISON →
ST. MARYS VS
Olean
Income $51,261 −7%
Home value $86,100 −28%
Population 13,508 +10%
SEE FULL COMPARISON →
ST. MARYS VS
Park Forest
Income $79,120 +44%
Home value $389,600 +224%
Population 8,624 −30%
SEE FULL COMPARISON →
ST. MARYS VS
State College
Income $45,424 −17%
Home value $437,800 +264%
Population 40,844 +233%
SEE FULL COMPARISON →
Frequently asked
How many people live in St. Marys, Pennsylvania? St. Marys, Pennsylvania has about 12,738 residents according to the 2020 American Community Survey.
What is the median household income in St. Marys, Pennsylvania? The typical household in St. Marys, Pennsylvania earns about $54,950 a year. Half of households make more than that, and half make less.
Is St. Marys, Pennsylvania expensive? In St. Marys, Pennsylvania, the median home is worth about $120,400, and the typical rent is about $654 a month.
How educated are people in St. Marys, Pennsylvania? About 20.4% of adults age 25 and over in St. Marys, Pennsylvania hold a bachelor's degree or higher.
What is the poverty rate in St. Marys, Pennsylvania? About 9.2% of people in St. Marys, Pennsylvania live below the federal poverty line.
Has St. Marys, Pennsylvania grown since 1990? Yes, St. Marys, Pennsylvania has grown since 1990. The population has added about 7,227 residents, a change of about 131 percent over that period.
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