StatisticUnion CityCaliforniaNational
Population density (sq mi)3,78925691
Median age37.536.037.7
Male/Female ratio1.0:11.0:11.0:1
Married (15yrs & older)62%52%55%
Families w/ Kids under 1843%46%43%
Speak English38%56%79%
Speak Spanish14%29%13%

Key findings

  • The population density in Union City is 1380% higher than California
  • The median age in Union City is 4% higher than California
  • In Union City 21.84% of the population is White
  • In Union City 4.99% of the population is Black
  • In Union City 52.37% of the population is Asian

Compare Union City, CA Demographics


      Union City population breakdown by race

      RaceUnion CityCaliforniaNational
      American Indian0.51%0.74%0.82%
      Native Hawaiian1.64%0.39%0.18%
      Mixed race6.84%4.62%3.06%
      Other race11.80%13.28%4.75%
      In Union City, 21.5% 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

      Union City age breakdown

      Marital status

      Age of children in married couples

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