Population density (sq mi)2,87725691
Median age36.936.037.7
Male/Female ratio1.1:11.0:11.0:1
Married (15yrs & older)44%52%55%
Families w/ Kids under 1842%46%43%
Speak English87%56%79%
Speak Spanish6%29%13%

Key findings

  • The population density in Eureka is 1024% higher than California
  • The median age in Eureka is 3% higher than California
  • In Eureka 77.86% of the population is White
  • In Eureka 1.84% of the population is Black
  • In Eureka 5.92% of the population is Asian

Compare Eureka, CA Demographics


      Eureka population breakdown by race

      American Indian2.86%0.74%0.82%
      Native Hawaiian0.00%0.39%0.18%
      Mixed race7.38%4.62%3.06%
      Other race4.15%13.28%4.75%
      In Eureka, 10.3% 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, CA demographics data displayed above is derived from the 2016 United States Census Bureau American Community Survey (ACS).