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, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Two or more races

Black or African American

Other race

Asian

Native American

Native Hawaiian or Pacific Islander

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%
Native American	0	0%
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 $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