Population density (sq mi)9125691
Median age50.036.037.7
Male/Female ratio0.9:11.0:11.0:1
Married (15yrs & older)75%52%55%
Families w/ Kids under 1841%46%43%
Speak English96%56%79%
Speak Spanish4%29%13%

Key findings

  • The population density in Waterloo is 64% lower than California
  • The median age in Waterloo is 39% higher than California
  • In Waterloo 83.06% of the population is White
  • In Waterloo 0.00% of the population is Black
  • In Waterloo 0.00% of the population is Asian

Compare Waterloo, CA Demographics


      Waterloo population breakdown by race

      American Indian0.00%0.74%0.82%
      Native Hawaiian0.00%0.39%0.18%
      Mixed race1.41%4.62%3.06%
      Other race15.52%13.28%4.75%
      In Waterloo, 15.3% 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

      Waterloo age breakdown

      Marital status

      Age of children in married couples

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