StatisticJeffersonIowaNational
Population4,2073,155,070328,239,523
Population density (sq mi)7055791
Median age48.238.037.7
Male/Female ratio0.9:11.0:11.0:1
Married (15yrs & older)68%60%55%
Families w/ Kids under 1834%44%43%
Speak English97%92%79%
Speak Spanish2%4%13%

Key findings

  • The population density in Jefferson is 1137% higher than Iowa
  • The median age in Jefferson is 27% higher than Iowa
  • In Jefferson 97.03% of the population is White
  • In Jefferson 0.29% of the population is Black
  • In Jefferson 0.74% of the population is Asian

Compare Jefferson, IA Demographics

      vs

      Jefferson population breakdown by race

      RaceJeffersonIowaNational
      White97.03%90.90%73.35%
      Black0.29%3.32%12.63%
      Asian0.74%2.14%5.22%
      American Indian0.21%0.32%0.82%
      Native Hawaiian0.12%0.08%0.18%
      Mixed race1.62%1.97%3.06%
      Other race0.00%1.27%4.75%
      In Jefferson, 2.5% 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

      Jefferson age breakdown

      Marital status

      Age of children in married couples

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