Eureka Flag

Eureka

County Seat:
Yes
Area (mi²):
35.929
State:
Kansas

Eureka is located in Greenwood County, Kansas. Eureka has a 2025 population of 21 . It is also the county seat of Greenwood County . Eureka is currently declining at a rate of 0% annually and its population has decreased by 0% since the most recent census, which recorded a population of 21 in 2020.

21
Total Population
1
Density (mi²)

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)
White63100%

Eureka Marital Status

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

Married

Widowed

Divorced

Separated

Never Married

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)