St. Mary, MT
Population 209 · Montana
About St. Mary, MT
St. Mary is a small community in Montana with a population of 209 residents. The median household income is $0 per year, which is below the national average. The median age in St. Mary is 22 years.
Housing in St. Mary has a median home value of $0 and median monthly rent of $0. Of the 80 total housing units, the majority are owner-occupied, with 17 owner-occupied and 8 renter-occupied units.
The unemployment rate in St. Mary is 8.9% and the poverty rate is 52.6%. 34.3% of residents hold a bachelor's degree or higher. The average commute time is 11.8 minutes.
Cost of Living in St. Mary, MT
Compared to national averages, St. Mary has a median household income of $0 (100% below the national median of $75,149). Home values average $0, which is 100% below the national median. Monthly rent at $0 is 100% below the US average of $1,163. Within Montana, St. Mary's income is 100% below the state average of $65,821, and home values are 100% below the state median of $288,703.
Why Live in St. Mary, MT?
St. Mary offers affordable housing with a median home value of $0, below the US average of $244,900, and rent that’s lower than the national average at $0/month, and a well-educated community where 34.3% of residents hold a bachelor’s degree or higher. Additionally, the city features short commute times averaging just 11.8 minutes.
Potential considerations include median household income ($0) that falls below the national average. However, St. Mary’s smaller community size offers a quieter lifestyle and tight-knit neighborhoods.
St. Mary has a population of 209 with a median age of 22 years. Compare St. Mary with other cities to see how it stacks up, or explore all cities in Montana.
Similar Cities Near St. Mary
Cities in Montana with a similar population size.
| City | Population | Median Income | Home Value | |
|---|---|---|---|---|
| Highwood | 209 | $71,875 | $169,100 | Compare |
| West Glacier | 209 | $87,344 | $565,500 | Compare |
| Elliston | 208 | $41,719 | $248,300 | Compare |
| Winifred | 207 | $75,089 | $0 | Compare |
| Riverview Colony | 212 | $2,499 | $0 | Compare |
| Charlos Heights | 213 | $88,042 | $0 | Compare |
| Moore | 204 | $45,972 | $180,200 | Compare |
| Gibson Flats | 203 | $0 | $0 | Compare |
Demographics
Racial & Ethnic Composition
Economy & Education
Housing
Other Cities in Montana
Data source: US Census Bureau ACS 5-Year Estimates. Last updated: 2026-04-05.
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Frequently Asked Questions about St. Mary
What is the population of St. Mary, MT?
The population of St. Mary, MT is 209 according to the latest Census data.
What is the median household income in St. Mary?
The median household income in St. Mary, MT is $0 per year.
What is the median home value in St. Mary?
The median home value in St. Mary, MT is $0.
What is the average rent in St. Mary?
The median monthly rent in St. Mary, MT is $0.
What is the unemployment rate in St. Mary?
The unemployment rate in St. Mary, MT is 8.9%.