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CITY

St. Marys

Pennsylvania · 12,253 residents (2025 est.) · 99.316 sq mi
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The short version

St. Marys has lower-than-average household income, with a median household income of $67,167. Population has declined 14% since 2000. 21% of adults hold a bachelor's degree or higher, below the national rate of 36%. Median home value has risen by half since 2000, reaching $149,000. With a median age of 51.6, the population is older than the US median of 38.9.

At a glance
Lower income
below the US median
US median: $82,259
Older
median age 51.6
US median: 38.9
Less educated
21% hold a bachelor's degree
US average: 36%
More affordable
home values down 7%, inflation adjusted
US median home: $376,019
Section 01

Population & growth

Total population
12,529
−14%since 2000
from 14,502 in 2000
1990 – 2025
Population density
126 / sq mi
−14%since 2000
from 146 / sq mi in 2000
US average: 281
Median age
51.6
+31%since 2000
from 39.4 in 2000
US average: 38.9

PEP 2025 EST:12,253 residents (Census Bureau Vintage 2025, released March 2026)

Population, 1990 – 2024
5K7K10K13K15K1990201020202024St. Marys
202413K
1990201020202024
Section 02

Income & economy

Median household income
$67,167
−11%inflation adjusted, since 2000
from $41,593 in 2000
US average: $82,259
1990 – 2024
Per capita income
$37,323
+88%since 2000
from $19,885 in 2000
US average: $44,673
Households earning $100K+
44.0%
+18.9 ptssince 2009
from 25.1% in 2009
US average: 53.3%
Poverty rate
7.8%
+3.0 ptssince 2000
from 4.8% in 2000
US average: 12.5%
Income inequality (Gini)
0.404
+1%since 2010
from 0.401 in 2010
US average: 0.476
Workforce by industry, 2024
Retail trade36.6%
US avg: 9.9%
Information7.4%
US avg: 10.8%
Wholesale trade5.5%
US avg: 6.9%
Finance & insurance4.3%
US avg: 5.9%
Professional, scientific, technical4.3%
US avg: 5.1%
Transportation & warehousing3.5%
US avg: 2.2%
Other services2.3%
US avg: 6.7%
Arts, entertainment, food2.1%
US avg: 1.9%
Public administration1.4%
US avg: 4.8%
Agriculture, forestry, fishing0.3%
US avg: 1.6%
Manufacturing0.3%
US avg: 0.4%
Construction0%
US avg: 1.2%
Education & health services0%
US avg: 0.9%
BARS: THIS PLACE · TICKS: US AVERAGE
Section 03

Housing

Median home value
$149,000
−7%inflation adjusted, since 2000
from $87,900 in 2000
US average: $376,019
1990 – 2024
Median gross rent
$762
−8%inflation adjusted, since 2000
from $454 in 2000
US average: $1,442
Owner-occupied
77.6%
+0.2 ptssince 2000
from 77.4% in 2000
22.4% rent
Vacancy rate
9.7%
+3.0 ptssince 2009
from 6.6% in 2009
US average: 10.0%
Owner cost-burdened
8.4%
−8.2 ptssince 2009
from 16.6% in 2009
US average: 22.9%
Renter cost-burdened
41.4%
−2.0 ptssince 2009
from 43.4% in 2009
US average: 47.4%
Afford Score
2.2
+5%since 2000
from 2.1 in 2000
1990 – 2024
Gentrification Score
34
RELATED:See current rent listings in St. Marys on RentDataNow
Section 04

Race & ethnicity

2000
White, non-Hispanic98.6%(14,299)
Black0.2%(30)
Hispanic / Latino0.3%(44)
Asian0.4%(60)
Other0%
Diversity Score2.3%(334)
2024
White, non-Hispanic93.8%(11,756)
Black1.3%(165)
Hispanic / Latino1.6%(196)
Asian0.2%(20)
Other3.1%(392)
Diversity Score14.8%(1,851)
Diversity Score
15
+541%since 2000
from 2 in 2000
1990 – 2024
Section 05

Education

Bachelor's degree or higher
21.4%
+5.9 ptssince 2000
from 15.5% in 2000
US average: 35.6%
High school or higher
95.2%
+10.8 ptssince 2000
from 84.4% in 2000
US average: 89.6%
Graduate degree
7.5%
+2.6 ptssince 2000
from 4.9% in 2000
US average: 14.0%
Section 06

Commute & transportation

Average commute
14.2 min
+39%since 2000
from 10.2 min in 2000
US average: 26.5
Drive alone to work
84.5%
−2.6 ptssince 2009
from 87.1% in 2009
US average: 68.9%
Carpooled to work
10.2%
+3.3 ptssince 2009
from 6.9% in 2009
US average: 8.5%
Public transit
0.3%
−0.4 ptssince 2009
from 0.7% in 2009
US average: 3.2%
Worked from home
1.8%
+0.6 ptssince 2009
from 1.1% in 2009
US average: 15.0%
Walked to work
1.2%
−1.3 ptssince 2009
from 2.5% in 2009
US average: 2.4%
Biked to work
0.0%
Unchangedsince 2009
from 0.0% in 2009
US average: 0.4%
No vehicle available
8.7%
+1.7 ptssince 2009
from 6.9% in 2009
US average: 8.3%
Section 07

Work & employment

Unemployment rate
7.7%
+1.9 ptssince 2011
from 5.7% in 2011
US average: 5.2%
Labor force participation
62.2%
−0.5 ptssince 2011
from 62.6% in 2011
US average: 63.5%
Self-employed
8.5%
+0.1 ptssince 2009
from 8.4% in 2009
US average: 13.1%
Management & professional
29.0%
−31.0 ptssince 2009
from 60.0% in 2009
US average: 42.5%
Section 08

People & community

Male
48.6%
−0.4 ptssince 2009
from 49.0% in 2009
Female
51.4%
+0.4 ptssince 2009
from 51.0% in 2009
Foreign born
1.4%
+1.1 ptssince 2009
from 0.4% in 2009
US average: 14.1%
Veterans
5.8%
−43.3 ptssince 2009
from 49.1% in 2009
US average: 6.2%
With a disability
16.9%
+3.2 ptssince 2012
from 13.7% in 2012
US average: 13.3%
Uninsured
1.3%
−92.6 ptssince 2013
from 93.9% in 2013
US average: 8.4%
Broadband at home
86.2%
+10.0 ptssince 2017
from 76.2% in 2017
US average: 91.0%
English only at home
97.8%
−0.5 ptssince 2016
from 98.3% in 2016
US average: 77.7%
Spanish at home
0.6%
+0.4 ptssince 2016
from 0.2% in 2016
US average: 13.6%
Drill deeper

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Compare St. Marys to nearby cities

ST. MARYS VS
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Home value$103,800−30%
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ST. MARYS VS
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Home value$86,100−42%
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ST. MARYS VS
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ST. MARYS VS
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Home value$437,800+194%
Population40,844+233%
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Frequently asked

How many people live in St. Marys, Pennsylvania?

St. Marys, Pennsylvania has about 12,529 residents according to the 2024 American Community Survey.

What is the median household income in St. Marys, Pennsylvania?

The typical household in St. Marys, Pennsylvania earns about $67,167 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 $149,000, and the typical rent is about $762 a month.

How educated are people in St. Marys, Pennsylvania?

About 21.4% 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 7.8% 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 7,018 residents, a change of about 127 percent over that period.

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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

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