Statistic Eureka South Dakota National
Population 992 884,659 328,239,523
Population density (sq mi) 1,063 12 91
Median age 57.2 36.8 37.7
Male/Female ratio 0.7:1 1.0:1 1.0:1
Married (15yrs & older) 63% 59% 55%
Families w/ Kids under 18 24% 44% 43%
Speak English 89% 94% 79%
Speak Spanish 2% 2% 13%
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Demographics Quick Facts

  • The population density in Eureka is 8761% higher than South Dakota
  • The median age in Eureka is 55% higher than South Dakota
  • In Eureka 92.64% of the population is White
  • In Eureka 3.93% of the population is Black
  • In Eureka 1.81% of the population is Asian

Compare Eureka, SD Demographics

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      Eureka racial demographics

      Race Eureka South Dakota National
      White 92.64% 84.77% 73.35%
      Black 3.93% 1.65% 12.63%
      Asian 1.81% 1.33% 5.22%
      American Indian 0.00% 8.72% 0.82%
      Native Hawaiian 0.00% 0.04% 0.18%
      Mixed race 1.61% 2.61% 3.06%
      Other race 0.00% 0.88% 4.75%
      In Eureka, 4.1% 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.

      Household income distribution

      Place of birth by citizenship

      Eureka age breakdown

      Marital status

      Age of children in married couples

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