StatisticHillsdaleSan MateoCalifornia
Population density (sq mi)8,1498,428256
Median age39.938.936.0
Male/Female ratio1.0:11.0:11.0:1
Married (15yrs & older)n/a56%52%
Families w/ Kids under 1845%45%46%
Speak Englishn/a55%56%
Speak Spanishn/a22%29%

Key findings

  • The population density in Hillsdale is 3% lower than San Mateo
  • The median age in Hillsdale is 2% higher than San Mateo
  • In Hillsdale 62.08% of the population is White
  • In Hillsdale 2.42% of the population is Black
  • In Hillsdale 23.07% of the population is Asian

Compare San Mateo, CA Demographics


      Hillsdale population breakdown by race

      RaceHillsdaleSan MateoCalifornia
      American Indian0.34%0.34%0.74%
      Native Hawaiian0.68%1.63%0.39%
      Mixed race4.79%5.63%4.62%
      Other race6.62%8.98%13.28%
      In Hillsdale, 26.8% 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

      Hillsdale age breakdown

      Marital status

      Age of children in married couples

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