Eureka Flag

Eureka

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

Eureka is a CDP located in Winnebago County, Wisconsin. Eureka has a 2026 population of 263. Eureka is currently growing at a rate of 1.15% annually and its population has decreased by 0% since the most recent census, which recorded a population of 0 in 2020.

The median household income in Eureka is $54,500 with a poverty rate of 1.23%. The median age in Eureka is 55.2 years: 55.2 years for males, and 54.5 years for females. For every 100 females there are 85.6 males.

263
Total Population
249
Density (mi²)
3 1.15%
Growth

Eureka Population

Eureka Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
202626331.15%
202526020.78%

Median Age

Overall: 55.2 years
Female: 54.5 years
Male: 55.2 years

Eureka Adults

There are 130 adults, (37 of whom are seniors) in Eureka.

Sex Ratio

Female: 90 (53.9%)
Male: 77 (46.1%)

Demographics

The racial composition of Eureka includes 94.01% White, 5.99% Black or African American, and smaller percentages for and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White15794.01%
Black or African American105.99%
Race
Population ↓
Percentage (of total)
White15794.01%
Black or African American105.99%

Eureka Marital Status

Economics and Income Statistics

Eureka 's average per capita income is $41,625. Household income levels show a median of $54,500. The poverty rate stands at 1.23%.

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$83,125$92,348
Married Families$69,583-
Households$54,500$82,092
Families$53,875$75,328

$41,625

Average Income

$54,500

Median Household Income

1.23%

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)