Population density (sq mi)5325691
Median age53.836.037.7
Male/Female ratio0.5:11.0:11.0:1
Married (15yrs & older)47%52%55%
Families w/ Kids under 1817%46%43%
Speak English77%56%79%
Speak Spanish23%29%13%

Key findings

  • The population density in Onyx is 79% lower than California
  • The median age in Onyx is 49% higher than California
  • In Onyx 95.25% of the population is White
  • In Onyx 0.00% of the population is Black
  • In Onyx 0.00% of the population is Asian

Compare Onyx, CA Demographics


      Onyx population breakdown by race

      American Indian0.00%0.74%0.82%
      Native Hawaiian0.00%0.39%0.18%
      Mixed race2.13%4.62%3.06%
      Other race2.62%13.28%4.75%
      In Onyx, 26.9% 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

      Onyx age breakdown

      Marital status

      Age of children in married couples

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