Eureka Flag

Eureka

County Seat:
Yes
Area (mi²):
35.876
State:
Kansas

Eureka is located in Greenwood County, Kansas. Eureka has a 2025 population of 83 . It is also the county seat of Greenwood County . Eureka is currently declining at a rate of -3.49% annually and its population has decreased by -8.79% since the most recent census, which recorded a population of 91 in 2020.

The average household income in Eureka is $67,600 with a poverty rate of 4.6%. The median age in Eureka is 63.5 years: 55.3 years for males, and 64.7 years for females. For every 100 females there are 102.3 males.

83
Total Population
2
Density (mi²)
-3 -3.49%
Growth

Eureka Population

Eureka Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Eureka includes 85.06% White, and smaller percentages for and multiracial populations.

Population by Race

White (85.06%)

Two or more races (14.94%)

Race
Population
Percentage (of total)
White7485.06%
Two or more races1314.94%

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 $53,250. Household income levels show a median of $54,545. The poverty rate stands at 4.6%.

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$54,545$67,600
Non Families$17,750$16,300
Families-$84,700
Married Families--

$53,250

Average Income

$54,545

Median Household Income

4.6%

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)