Duncan, IA Demographics

Statistic Duncan Iowa National
Population 102 3,155,070 328,239,523
Population density (sq mi) 130 57 91
Median age 41.3 38.0 37.7
Male/Female ratio 2.4:1 1.0:1 1.0:1
Married (15yrs & older) 27% 60% 55%
Families w/ Kids under 18 100% 44% 43%
Speak English 88% 92% 79%
Speak Spanish 12% 4% 13%
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Demographics Quick Facts

  • The population density in Duncan is 128% higher than Iowa
  • The median age in Duncan is 9% higher than Iowa
  • In Duncan 89.22% of the population is White
  • In Duncan 0.00% of the population is Black
  • In Duncan 0.00% of the population is Asian

Compare Duncan, IA Demographics

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      Duncan racial demographics

      Race Duncan Iowa National
      White 89.22% 90.90% 73.35%
      Black 0.00% 3.32% 12.63%
      Asian 0.00% 2.14% 5.22%
      American Indian 0.00% 0.32% 0.82%
      Native Hawaiian 0.00% 0.08% 0.18%
      Mixed race 10.78% 1.97% 3.06%
      Other race 0.00% 1.27% 4.75%
      In Duncan, 10.8% 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.

      The best places in Iowa

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      Household income distribution

      Place of birth by citizenship

      Duncan age breakdown

      Marital status

      Age of children in married couples

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