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, 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	196	93.33%
Two or more races	12	5.71%
Black or African American	2	0.95%
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 $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