St. Mary is located in Waseca County, Minnesota. St. Mary has a 2025 population of 390 . St. Mary is currently declining at a rate of -1.52% annually and its population has decreased by -3.23% since the most recent census, which recorded a population of 403 in 2020.
The average household income in St. Mary is $94,203 with a poverty rate of 5.06%. The median age in St. Mary is 40.4 years: 42.8 years for males, and 38 years for females. For every 100 females there are 116.4 males.
Data after 2023 is projected based on recent change
The racial composition of St. Mary includes 91.81% White, and smaller percentages for other race, Black or African American, Asian and multiracial populations.
White (91.81%)
Two or more races (3.78%)
Other race (1.89%)
Black or African American (1.26%)
Asian (1.26%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 437 | 91.81% |
| Two or more races | 18 | 3.78% |
| Other race | 9 | 1.89% |
| Black or African American | 6 | 1.26% |
| Asian | 6 | 1.26% |
Married
Widowed
Divorced
Separated
Never Married
St. Mary's average per capita income is $52,679. Household income levels show a median of $89,063. The poverty rate stands at 5.06%.
Name | Median | Mean |
|---|---|---|
| Married Families | $108,750 | - |
| Families | $100,250 | $105,027 |
| Households | $89,063 | $94,203 |
| Non Families | $25,000 | $47,329 |
Average Income
Median Household Income
Poverty Rate