St. Mary

County:: Marion County
County Seat:: No
Area (mi²):: 0.778
State:: Kentucky

St. Mary is a city located in Marion County, Kentucky. St. Mary has a 2025 population of 146. St. Mary is currently growing at a rate of 1.39% annually and its population has increased by 5.8% since the most recent census, which recorded a population of 138 in 2020.

The average household income in St. Mary is $64,719 with a poverty rate of 4.29%.The median age in St. Mary is 28.3 years: 26.4 years for males, and 31.8 years for females.

Demographics

The racial composition of St. Mary includes 93.33% White, and smaller percentages for Black or African American and multiracial populations.

Population by Race

Race	Population	Percentage (of total)
White	196	93.33%
Two or more races	12	5.71%
Black or African American	2	0.95%

St. Mary Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

St. Mary's average per capita income is $41,806. Household income levels show a median of $60,833. The poverty rate stands at 4.29%.

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
Households	$60,833	$64,719
Families	$60,625	$68,135
Married Families	-	-
Non Families	-	$57,888

$41,806

Average Income

$60,833

Median Household Income

4.29%

Poverty Rate