Eureka

County:: St. Louis County
County Seat:: No
Area (mi²):: 11.14
State:: Missouri

Eureka is a city located in St. Louis County, Missouri. Eureka has a 2025 population of 13,974. Eureka is currently growing at a rate of 3.26% annually and its population has increased by 18.74% since the most recent census, which recorded a population of 11,769 in 2020.

The average household income in Eureka is $136,584 with a poverty rate of 6.16%. The median age in Eureka is 37.5 years: 36.3 years for males, and 38.9 years for females.

Demographics

The racial composition of Eureka includes 87.49% White, and smaller percentages for Asian, other race, Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Two or more races

Asian

Other race

Black or African American

Native American

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	10,824	87.49%
Two or more races	1,068	8.63%
Asian	269	2.17%
Other race	160	1.29%
Black or African American	49	0.4%
Native American	1	0.01%
Native Hawaiian or Pacific Islander	0	0%

Eureka Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Eureka's average per capita income is $75,134. Household income levels show a median of $108,947. The poverty rate stands at 6.16%.

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	$146,083	-
Families	$139,200	$158,404
Households	$108,947	$136,584
Non Families	$52,104	$79,501

$75,134

Average Income

$108,947

Median Household Income

6.16%

Poverty Rate