Eureka

County:: Winnebago County
County Seat:: No
Area (mi²):: 1.056
State:: Wisconsin

Eureka is a CDP located in Winnebago County, Wisconsin. Eureka has a 2025 population of 295. Eureka is currently growing at a rate of 1.72% annually but its population has decreased by -28.05% since the most recent census, which recorded a population of 410 in 2020.

The average household income in Eureka is $81,413 with a poverty rate of 3.19%. The median age in Eureka is 34.2 years: 29.7 years for males, and 34.6 years for females.

Demographics

The racial composition of Eureka includes 95.69% White, 4.31% Black or African American, and smaller percentages for Native American, Asian, Native Hawaiian or Pacific Islander, other race, Two or more races and multiracial populations.

Population by Race

White

Black or African American

Native American

Asian

Native Hawaiian or Pacific Islander

Other race

Two or more races

Race	Population	Percentage (of total)
White	244	95.69%
Black or African American	11	4.31%
Native American	0	0%
Asian	0	0%
Native Hawaiian or Pacific Islander	0	0%
Other race	0	0%
Two or more races	0	0%

Eureka Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Eureka's average per capita income is $41,136. Household income levels show a median of $67,083. The poverty rate stands at 3.19%.

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
Non Families	$102,917	$94,532
Married Families	$77,625	-
Households	$67,083	$81,413
Families	$60,000	$76,727

$41,136

Average Income

$67,083

Median Household Income

3.19%

Poverty Rate