Eureka

County:: Woodford County
County Seat:: No
Area (mi²):: 2.737
State:: Illinois

Eureka is a city located in Woodford County, Illinois. Eureka has a 2025 population of 5,166. Eureka is currently declining at a rate of -0.19% annually and its population has decreased by -0.96% since the most recent census, which recorded a population of 5,216 in 2020.

The average household income in Eureka is $72,759 with a poverty rate of 13.94%.The median age in Eureka is 40.7 years: 36.2 years for males, and 49.9 years for females.

Demographics

The racial composition of Eureka includes 93.07% White, and smaller percentages for Black or African American, other race, Asian and multiracial populations.

Population by Race

Race	Population	Percentage (of total)
White	4,742	93.07%
Two or more races	156	3.06%
Black or African American	96	1.88%
Other race	90	1.77%
Asian	11	0.22%

Eureka Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Eureka's average per capita income is $55,878. Household income levels show a median of $55,172. The poverty rate stands at 13.94%.

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	$100,658	-
Families	$86,582	$101,689
Households	$55,172	$72,759
Non Families	$22,336	$32,018

$55,878

Average Income

$55,172

Median Household Income

13.94%

Poverty Rate