Eureka demographics profile

StatisticEurekaSouth DakotaNational
Population density (sq mi)9621291
Median age59.636.837.7
Male/Female ratio0.7:11.0:11.0:1
Married (15yrs & older)74%59%55%
Families w/ Kids under 1835%44%43%
Speak English79%94%79%
Speak Spanish7%2%13%
Eureka, SD has a population of 898 and is the 15,818th largest city in the United States. The population density is 962 per sq mi which is 7920% higher than the South Dakota average and 962% higher than the national average. The median age in Eureka is 60 which is approximately 62% higher than the South Dakota average of 37. In Eureka, 74% of the population over 15 years of age are married, 79% speak English and 7% speak Spanish. 62% of Eureka residents were born in South Dakota, 38% were born out of state, 0% were born outside of the United States and 1% were foreign born.
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Did you know?

  • The population density in Eureka is 7920% higher than South Dakota.
  • The median age in Eureka is 62% higher than South Dakota.
  • In Eureka 98.44% of the population is White.
  • In Eureka 0.00% of the population is Black or African American.
  • In Eureka 0.78% of the population is Asian.

Compare Eureka, SD Demographics To Other Cities

Eureka population breakdown by race

RaceEurekaSouth DakotaNational
Black or African American0.00%1.65%12.63%
American Indian0.00%8.72%0.82%
Native Hawaiian0.00%0.04%0.18%
Mixed race0.78%2.61%3.06%
Other race0.00%0.88%4.75%
In Eureka, 7.7% of people are of Hispanic or Latino origin.
Please note: Hispanics may be of any race, so also are included in any/all of the applicable race categories above.

Languages spoken

Place of birth by citizenship

Household income distribution

Source of income

Eureka age breakdown

Marital status

Age of children in married couples

Source: The Eureka, SD demographics data displayed above is derived from the 2016 United States Census Bureau American Community Survey (ACS).
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