Eureka Flag

Eureka

County Seat:
Yes
Area (mi²):
36.599
State:
Kansas

Eureka is located in Greenwood County, Kansas. Eureka has a 2025 population of 33 . It is also the county seat of Greenwood County . Eureka is currently declining at a rate of -2.94% annually and its population has decreased by -2.94% since the most recent census, which recorded a population of 34 in 2020.

The average household income in Eureka is $51,188 with a poverty rate of 0%. The median age in Eureka is 67.4 years: 67.5 years for males, and 34.5 years for females. For every 100 females there are 457.1 males.

33
Total Population
1
Density (mi²)
-1 -2.94%
Growth

Eureka Population

Eureka Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Eureka includes 100% White, and smaller percentages for and multiracial populations.

Population by Race

White (100%)

Race
Population
Percentage (of total)
White39100%

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 $0. Household income levels show a median of $38,879. The poverty rate stands at 0%.

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
Households$38,879$51,188
Families$38,879$51,188
Married Families$38,879-
Non Families--

$0

Average Income

$38,879

Median Household Income

0%

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)