Eureka

County:: Greenwood County
County Seat:: Yes
Area (mi²):: 2.29
State:: Kansas

Eureka is a city located in Greenwood County, Kansas. Eureka has a 2025 population of 2,231. It is also the county seat of Greenwood County. Eureka is currently declining at a rate of -0.71% annually and its population has decreased by -3.55% since the most recent census, which recorded a population of 2,313 in 2020.

The average household income in Eureka is $64,456 with a poverty rate of 26.47%. The median age in Eureka is 44.4 years: 41.7 years for males, and 50.1 years for females.

Demographics

The racial composition of Eureka includes 90.66% White, and smaller percentages for Native American, other race, Black or African American, Asian, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Two or more races

Native American

Other race

Black or African American

Asian

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	2,059	90.66%
Two or more races	105	4.62%
Native American	56	2.47%
Other race	27	1.19%
Black or African American	19	0.84%
Asian	5	0.22%
Native Hawaiian or Pacific Islander	0	0%

Eureka Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Eureka's average per capita income is $32,331. Household income levels show a median of $45,121. The poverty rate stands at 26.47%.

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	$95,536	-
Families	$61,705	$73,444
Households	$45,121	$64,456
Non Families	$30,250	$46,761

$32,331

Average Income

$45,121

Median Household Income

26.47%

Poverty Rate