St. Marys, Ohio Demographics & Population 2026
During the 2020–2024 ACS period, St. Marys, Ohio had a total population of 8,301, the 216th largest city in Ohio, with a median household income of $79,516, which is 11% higher than the state average. The poverty rate is 6.6%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Housing is very affordable with a home-value-to-income ratio of just 1.9x.
- Near full employment with an unemployment rate of just 1.8%.
St. Marys Quick Facts
How St. Marys Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 8,319 | 8,301 | -0.2% |
| Median household income | $72,056 | $79,516 | +10.4% |
| Median home value | $138,500 | $148,500 | +7.2% |
How St. Marys Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
A less diverse community where one racial or ethnic group represents a large majority.
State average: 41 | National average: 61
Education
Educational Attainment (Adults 25+)
St. Marys Rankings in Ohio
Explore Ohio Rankings
Other Cities in Auglaize County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Wapakoneta | 9,894 | $65,570 | 11.8% | $158,400 |
| New Bremen | 2,787 | $82,019 | 5.4% | $234,600 |
| Cridersville | 1,801 | $55,221 | 18.2% | $144,300 |
| New Knoxville | 1,058 | $81,685 | 3.3% | $180,700 |
| Waynesfield | 752 | $65,156 | 11.7% | $121,300 |
| New Hampshire | 445 | $162,813 | 1.4% | $118,100 |
| Buckland | 226 | $67,500 | 4.9% | $104,800 |
| Uniopolis | 166 | $88,237 | 6.6% | $94,000 |
| St. Johns | 163 | N/A | 0.0% | $135,400 |
Cities Similar to St. Marys
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Oberlin | 8,329 | $81,308 | $225,600 | 53.8% | 16.1% |
| Orrville | 8,343 | $72,569 | $188,900 | 24.6% | 15.2% |
| Napoleon | 8,802 | $76,639 | $146,600 | 19.5% | 7.9% |
| Blacklick Estates | 8,389 | $69,368 | $165,000 | 14.0% | 12.7% |
| Northridge | 7,817 | $84,974 | $193,800 | 23.1% | 8.2% |
Population Overview
St. Marys is a small city located in Ohio, within Auglaize County. The total population is 8,301. It ranks as the 216th most populous out of 1,264 Census-designated places in Ohio.
Age Demographics
The median age in St. Marys is 36.6 years. This is 8% lower than the state median of 39.7 years.
Economy, Income & Housing
The median household income in St. Marys is $79,516. This is 11% higher than the state median of $71,389. It is also 2% lower than the national median of $80,734. The poverty rate stands at 6.6%. This is 50% lower than the state poverty rate of 13.3%. The unemployment rate is 1.8%. This is 62% lower than the state rate of 4.8%. The median home value is $148,500. Housing costs are 31% lower than the state median of $214,800. With a home-value-to-income ratio of just 1.9x, St. Marys is one of the most affordable housing markets in the area. 79.0% of occupied housing units are owner-occupied. This homeownership rate is 18% higher than the state average of 67.2%.
Race & Ethnicity
St. Marys has a predominantly White (non-Hispanic) population, comprising 90.9% of all residents. Hispanic or Latino residents account for 5.9%. The Black or African American population (1.7%) is well below the state average of 12.0%. The Asian population (0.1%) is well below the state average of 2.5%.
Education
17.5% of residents aged 25 and older hold a bachelor's degree or higher. This is 44% lower than the state rate of 31.5%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 96.1%.
Data Sources & Methodology
All demographic data for St. Marys, Ohio is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Ohio state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,264 Census-designated places in Ohio. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
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Frequently Asked Questions
What is the population of St. Marys, Ohio?
St. Marys, Ohio has a population of 8,301 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in St. Marys, OH?
The median household income in St. Marys is $79,516, which is 2% lower than the national median of $80,734.
What is the poverty rate in St. Marys, OH?
The poverty rate in St. Marys is 6.6%. This means approximately 540 residents live below the federal poverty line.
What is the racial makeup of St. Marys, Ohio?
St. Marys's population is 90.9% White, 1.7% Black, 5.9% Hispanic/Latino, and 0.1% Asian.
What is the median home value in St. Marys, OH?
The median home value in St. Marys is $148,500. The home-value-to-income ratio is 1.9x.
How educated is St. Marys, Ohio?
17.5% of adults (25+) in St. Marys hold a bachelor's degree or higher, and 4.9% hold a graduate or professional degree.