St. Mary, MO
Population 255 · Missouri
About St. Mary, MO
St. Mary is a small community in Missouri with a population of 255 residents. The median household income is $57,500 per year, which is near the national average. The median age in St. Mary is 52.2 years.
Housing in St. Mary has a median home value of $97,500 and median monthly rent of $783. Of the 145 total housing units, the majority are owner-occupied, with 75 owner-occupied and 25 renter-occupied units.
The unemployment rate in St. Mary is 6.5% and the poverty rate is 24.8%. 10.6% of residents hold a bachelor's degree or higher. The average commute time is 36.6 minutes.
Cost of Living in St. Mary, MO
Compared to national averages, St. Mary has a median household income of $57,500 (23% below the national median of $75,149). Home values average $97,500, which is 60% below the national median. Monthly rent at $783 is 33% below the US average of $1,163. Within Missouri, St. Mary's income is 6% below the state average of $61,047, and home values are 35% below the state median of $150,786.
Why Live in St. Mary, MO?
St. Mary offers affordable housing with a median home value of $97,500, below the US average of $244,900, and rent that’s lower than the national average at $783/month.
Potential considerations include median household income ($57,500) 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 255 with a median age of 52.2 years. Compare St. Mary with other cities to see how it stacks up, or explore all cities in Missouri.
Similar Cities Near St. Mary
Cities in Missouri with a similar population size.
| City | Population | Median Income | Home Value | |
|---|---|---|---|---|
| Houstonia | 255 | $37,396 | $48,900 | Compare |
| Junction City | 254 | $25,833 | $95,000 | Compare |
| Rushville | 254 | $58,750 | $39,200 | Compare |
| High Hill | 252 | $65,625 | $141,100 | Compare |
| Lohman | 258 | $66,875 | $205,000 | Compare |
| Oak Ridge | 258 | $68,542 | $145,800 | Compare |
| Stella | 252 | $39,345 | $0 | Compare |
| West Sullivan | 252 | $49,500 | $133,300 | Compare |
Demographics
Racial & Ethnic Composition
Economy & Education
Housing
Other Cities in Missouri
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, MO?
The population of St. Mary, MO is 255 according to the latest Census data.
What is the median household income in St. Mary?
The median household income in St. Mary, MO is $57,500 per year.
What is the median home value in St. Mary?
The median home value in St. Mary, MO is $97,500.
What is the average rent in St. Mary?
The median monthly rent in St. Mary, MO is $783.
What is the unemployment rate in St. Mary?
The unemployment rate in St. Mary, MO is 6.5%.