United States › Ohio › St. Marys CITY
St. Marys Ohio · 8,398 residents (2025 est.) · 4.67 sq mi
Time machine
COMPARE TO 1990 Census 2000 Census 2009 ACS 2010 ACS 2011 ACS 2012 ACS 2013 ACS 2014 ACS 2015 ACS 2016 ACS 2017 ACS 2018 ACS 2019 ACS 2020 ACS 2021 ACS 2022 ACS 2023 ACS
The short version
With 8,301 people, St. Marys is a city in Ohio. Four-year degrees are less common here than nationally, at 18% of adults. Owners hold 79% of the housing stock. 0% of people here were born outside the United States. The typical home is worth $148,500, having more than doubled since 2000. The average commute runs 16 minutes.
At a glance
Average income
near the US median
US median: $82,259
Younger
median age 36.6
US median: 38.9
Less educated
18% hold a bachelor's degree
US average: 36%
Stable housing
home values roughly flat, inflation adjusted
US median home: $376,019
Section 01
Population & growth from 8,342 in 2000
8,398 in 2025 (Census Bureau estimate)
1,778 / sq mi
Unchangedsince 2009
from 1,783 / sq mi in 2009
US average: 281
from 34.9 in 2000
US average: 38.9
Population, 1990 – 2024
8K 8K 8K 8K 8K 1990 2000 2010 2020 2024 St. Marys Age distribution, 2024
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02
Income & economy $79,516
+13%inflation adjusted, since 2000
from $38,673 in 2000
US average: $82,259
from $17,682 in 2000
US average: $44,673
Households earning $100K+
from 19.4% in 2009
US average: 53.3%
from 7.3% in 2000
US average: 12.5%
from 0.364 in 2010
US average: 0.476
Workforce by industry, 2024
Professional, scientific, technical 1.5%
Transportation & warehousing 1.2%
Agriculture, forestry, fishing 1.1%
Public administration 0.7%
Arts, entertainment, food 0.2%
Education & health services 0%
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$148,500
+5%inflation adjusted, since 2000
from $77,900 in 2000
US average: $376,019
$848
−3%inflation adjusted, since 2000
from $479 in 2000
US average: $1,442
from 70.6% in 2000
21.0% rent
from 5.3% in 2009
US average: 10.0%
from 2.50 people in 2009
US average: 2.54
from 24.4% in 2009
US average: 22.9%
from 35.1% in 2009
US average: 47.4%
from 2.0 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.
Our index, 0 to 100. Higher means faster recent growth in incomes, home values, and college degrees.
Section 04
Race & ethnicity 2000
White, non-Hispanic 97.2%(8,106)
Hispanic / Latino 0.5%(38)
2024
White, non-Hispanic 90.9%(7,542)
Hispanic / Latino 5.9%(490)
from 9 in 2009
Our index, 0 to 100. Higher means a more even mix of racial and ethnic groups.
Section 04 · Origins
Detailed origins & ancestry Ancestry
+ 4 more ancestry groups with data from 11.8% in 2000
US average: 35.6%
High school or higher
from 82.1% in 2000
US average: 89.6%
from 4.1% in 2000
US average: 14.0%
Section 06
Commute & transportation from 12.4 min in 2000
US average: 26.5
from 89.8% in 2009
US average: 68.9%
from 3.9% in 2009
US average: 8.5%
from 0.2% in 2009
US average: 3.2%
from 1.8% in 2009
US average: 15.0%
from 2.8% in 2009
US average: 2.4%
from 0.2% in 2009
US average: 0.4%
from 2.4% in 2009
US average: 8.3%
Section 07
Work & employment from 9.7% in 2011
US average: 5.2%
from 68.8% in 2011
US average: 63.5%
Women 20-64 in the labor force
from 78.7% in 2020
US average: 74.6%
from 6.8% in 2009
US average: 13.1%
from 19.4% in 2009
US average: 42.5%
Section 08
People & community from 1.7% in 2009
US average: 14.1%
from 10.9% in 2009
US average: 6.2%
from 10.9% in 2012
US average: 13.3%
from 8.8% in 2013
US average: 8.4%
from 74.0% in 2017
US average: 91.0%
Computer in household
from 90.2% in 2020
US average: 95.5%
from 87.5% in 2020
US average: 87.7%
from 97.8% in 2016
US average: 77.7%
from 0.2% in 2016
US average: 13.6%
Marital status
Men 15+
Never married 36.6%(1,224)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
Section 09
Health coverage from 8.8% in 2013
US average: 8.4%
from 70.4% in 2020
US average: 54.8%
Direct-purchase
from 13.0% in 2020
US average: 13.8%
from 16.0% in 2020
US average: 18.4%
from 16.1% in 2020
US average: 20.9%
VA health care
from 1.3% in 2020
US average: 2.2%
Any private
from 80.6% in 2020
US average: 67.1%
Any public
from 31.0% in 2020
US average: 36.7%
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, 2024
Gulf War (2001 or later) 31.1%(174)
Gulf War (1990s) 22.7%(127)
Share of the 560 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
Celina
Income $62,849 −21%
Home value $164,100 +11%
Population 10,936 +30%
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ST. MARYS VS
Wapakoneta
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ST. MARYS VS
Lima
Income $46,240 −42%
Home value $107,200 −28%
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ST. MARYS VS
Sidney
Income $60,668 −24%
Home value $169,900 +14%
Population 20,124 +140%
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Frequently asked
How many people live in St. Marys, Ohio? St. Marys, Ohio has about 8,301 residents according to the 2024 American Community Survey.
What is the median household income in St. Marys, Ohio? The typical household in St. Marys, Ohio earns about $79,516 a year. Half of households make more than that, and half make less.
Is St. Marys, Ohio expensive? In St. Marys, Ohio, the median home is worth about $148,500, and the typical rent is about $848 a month.
How educated are people in St. Marys, Ohio? About 17.5% of adults age 25 and over in St. Marys, Ohio hold a bachelor's degree or higher.
What is the poverty rate in St. Marys, Ohio? About 6.6% of people in St. Marys, Ohio live below the federal poverty line.
Has St. Marys, Ohio grown since 1990? Yes, St. Marys, Ohio has shrunk since 1990. The population has lost about 140 residents, a change of about -2 percent over that period.
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