Eureka Flag

Eureka

County Seat:
Yes
Area (mi²):
57.609
State:
Kansas

Eureka is located in Greenwood County, Kansas. Eureka has a 2025 population of 359 . It is also the county seat of Greenwood County . Eureka is currently declining at a rate of -0.55% annually and its population has decreased by -1.37% since the most recent census, which recorded a population of 364 in 2020.

The average household income in Eureka is $69,396 with a poverty rate of 0%. The median age in Eureka is 62.4 years: 53.8 years for males, and 63.7 years for females. For every 100 females there are 250.0 males.

359
Total Population
6
Density (mi²)
-2 -0.55%
Growth

Eureka Population

Eureka Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Eureka includes 97.71% White, and smaller percentages for Two or more races and multiracial populations.

Population by Race

White (97.71%)

Two or more races (2.29%)

Race
Population
Percentage (of total)
White17197.71%
Two or more races42.29%

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 $45,156. Household income levels show a median of $68,630. 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
Families$68,822$75,187
Married Families$68,654-
Households$68,630$69,396
Non Families$46,250$50,333

$45,156

Average Income

$68,630

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)