Eureka Flag

Eureka

County Seat:
No
Area (mi²):
11.14
State:
Missouri

Eureka is a city located in St. Louis County, Missouri. Eureka has a 2026 population of 14,027. Eureka is currently growing at a rate of 2.75% annually and its population has increased by 19.12% since the most recent census, which recorded a population of 11,776 in 2020.

The median household income in Eureka is $108,394 with a poverty rate of 7.92%. The median age in Eureka is 37.5 years: 35.3 years for males, and 39.3 years for females. For every 100 females there are 110.4 males.

14K
Total Population
1,259
Density (mi²)
375 2.75%
Growth

Eureka Population

Eureka Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
202614,0273752.75%
202513,6523752.82%
202413,2771411.07%
202313,1363973.12%
202212,7395414.44%
202112,1985024.29%
202011,7768127.41%
201910,9641921.78%
201810,7722091.98%
201710,563280.27%
201610,535-47-0.44%
201510,582520.49%
201410,530790.76%
201310,451670.65%
201210,3841051.02%
201110,279740.73%
201010,205160.16%
20007,6762,99363.91%
19904,68382121.26%
19803,86200%

Median Age

Overall: 37.5 years
Female: 39.3 years
Male: 35.3 years

Eureka Adults

There are 9,113 adults, (1,766 of whom are seniors) in Eureka.

Sex Ratio

Female: 6,217 (47.5%)
Male: 6,864 (52.5%)

Demographics

The racial composition of Eureka includes 86.46% White, and smaller percentages for Asian, other race, Black or African American, Native American and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White11,31086.46%
Two or more races1,1779%
Asian2922.23%
Other race1961.5%
Black or African American1050.8%
Native American10.01%
Race
Population ↓
Percentage (of total)
Two or more races1721.31%
White1150.88%
Other race1050.8%
Race
Population ↓
Percentage (of total)
White11,19585.58%
Two or more races1,0057.68%
Asian2922.23%
Black or African American1050.8%
Other race910.7%
Native American10.01%

Eureka Marital Status

Economics and Income Statistics

Eureka 's average per capita income is $76,089. Household income levels show a median of $108,394. The poverty rate stands at 7.92%.

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$149,488-
Families$139,596$163,241
Households$108,394$135,296
Non Families$54,945$74,775

$76,089

Average Income

$108,394

Median Household Income

7.92%

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)