Eureka Flag

Eureka

County Seat:
Yes
Area (mi²):
36.255
State:
Kansas

Eureka is located in Greenwood County, Kansas. Eureka has a 2025 population of 616 . It is also the county seat of Greenwood County . Eureka is currently declining at a rate of -0.16% annually and its population has decreased by -2.22% since the most recent census, which recorded a population of 630 in 2020.

The average household income in Eureka is $74,111 with a poverty rate of 8.98%. The median age in Eureka is 52.1 years: 51.1 years for males, and 52.4 years for females. For every 100 females there are 115.9 males.

616
Total Population
17
Density (mi²)
-1 -0.16%
Growth

Eureka Population

Eureka Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Eureka includes 89.05% White, and smaller percentages for Asian, Black or African American, Native American and multiracial populations.

Population by Race

White (89.05%)

Two or more races (10.23%)

Asian (0.36%)

Black or African American (0.18%)

Native American (0.18%)

Race
Population
Percentage (of total)
White49689.05%
Two or more races5710.23%
Asian20.36%
Black or African American10.18%
Native American10.18%

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 $45,402. Household income levels show a median of $72,857. The poverty rate stands at 8.98%.

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
Married Families$87,353-
Families$86,193$98,583
Households$72,857$74,111
Non Families$32,054$35,995

$45,402

Average Income

$72,857

Median Household Income

8.98%

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)