Eureka Flag

Eureka

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.

295
Total Population
279
Density (mi²)
5 1.72%
Growth

Eureka Population

Eureka Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Eureka includes 95.69% White, 4.31% Black or African American, and smaller percentages for and multiracial populations.

Population by Race

Race
Population
Percentage (of total)
White24495.69%
Black or African American114.31%

Eureka Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

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

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)