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 2026 population of 305. St. Mary is currently declining at a rate of 0% annually and its population has decreased by -0.65% since the most recent census, which recorded a population of 307 in 2020.

The median household income in St. Mary is $49,643 with a poverty rate of 25.09%. The median age in St. Mary is 48.9 years: 38.3 years for males, and 53.1 years for females. For every 100 females there are 102.1 males.

305
Total Population
509
Density (mi²)

St. Mary Population

St. Mary Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
202630500%
2025305-1-0.33%
2024306-2-0.65%
2023308-1-0.32%
202230900%
202130920.65%
2020307-1-0.32%
201934900%
201834910.29%
2017348-1-0.29%
2016349-1-0.29%
2015350-3-0.85%
2014353-1-0.28%
201335400%
2012354-9-2.48%
201136330.83%
201036200%

Median Age

Overall: 48.9 years
Female: 53.1 years
Male: 38.3 years

St. Mary Adults

There are 229 adults, (45 of whom are seniors) in St. Mary.

Sex Ratio

Female: 141 (49.5%)
Male: 144 (50.5%)

Demographics

The racial composition of St. Mary includes 87.72% White, 3.16% Black or African American, and smaller percentages for and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White25087.72%
Two or more races269.12%
Black or African American93.16%
Race
Population ↓
Percentage (of total)
Two or more races10.35%
Race
Population ↓
Percentage (of total)
White25087.72%
Two or more races258.77%
Black or African American93.16%

St. Mary Marital Status

Economics and Income Statistics

St. Mary 's average per capita income is $34,722. Household income levels show a median of $49,643. The poverty rate stands at 25.09%.

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
Married Families$86,250-
Families$83,125$72,000
Households$49,643$59,120
Non Families$23,333$37,100

$34,722

Average Income

$49,643

Median Household Income

25.09%

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)