Population density (sq mi)3,2955691
Median age36.936.437.7
Male/Female ratio1.0:11.0:11.0:1
Married (15yrs & older)56%56%55%
Families w/ Kids under 1847%45%43%
Speak English79%83%79%
Speak Spanish17%12%13%

Key findings

  • The population density in Longmont is 5785% higher than Colorado
  • The median age in Longmont is 1% higher than Colorado
  • In Longmont 86.89% of the population is White
  • In Longmont 1.26% of the population is Black
  • In Longmont 2.68% of the population is Asian

Compare Longmont, CO Demographics


      Longmont population breakdown by race

      American Indian1.24%0.94%0.82%
      Native Hawaiian0.11%0.14%0.18%
      Mixed race2.68%3.43%3.06%
      Other race5.13%4.18%4.75%
      In Longmont, 25.9% 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

      Longmont age breakdown

      Marital status

      Age of children in married couples

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