St. Mary

County:: Ste. Genevieve County
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 307. St. Mary is currently declining at a rate of 0% annually and its population has increased by 0.33% since the most recent census, which recorded a population of 306 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.

Demographics

The racial composition of St. Mary includes 81.18% White, 8.63% Black or African American, and smaller percentages for Native American, Asian, Native Hawaiian or Pacific Islander, other race and multiracial populations.

Population by Race

White

Two or more races

Black or African American

Native American

Asian

Native Hawaiian or Pacific Islander

Other race

Race	Population	Percentage (of total)
White	207	81.18%
Two or more races	26	10.2%
Black or African American	22	8.63%
Native American	0	0%
Asian	0	0%
Native Hawaiian or Pacific Islander	0	0%
Other race	0	0%

St. Mary Marital Status

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