St. Mary Flag

St. Mary

County Seat:
No
Area (mi²):
0.599
State:
Missouri

St. Mary is a city located in Ste. Genevieve County, Missouri. St. Mary has a 2025 population of 305 . St. Mary is currently declining at a rate of -0.33% annually and its population has decreased by -0.65% since the most recent census, which recorded a population of 307 in 2020.

The average household income in St. Mary is $57,010 with a poverty rate of 24.8%. The median age in St. Mary is 52.2 years: 38.3 years for males, and 56.8 years for females. For every 100 females there are 87.5 males.

305
Total Population
509
Density (mi²)
-1 -0.33%
Growth

St. Mary Population

St. Mary Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of St. Mary includes 81.18% White, 8.63% Black or African American, and smaller percentages for and multiracial populations.

Population by Race

White (81.18%)

Two or more races (10.2%)

Black or African American (8.63%)

Race
Population
Percentage (of total)
White20781.18%
Two or more races2610.2%
Black or African American228.63%

St. Mary Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

St. Mary's average per capita income is $32,614. Household income levels show a median of $57,500. The poverty rate stands at 24.8%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median
Mean
Families$66,250$69,935
Married Families$66,250-
Households$57,500$57,010
Non Families$29,375$38,091

$32,614

Average Income

$57,500

Median Household Income

24.8%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)