Duncan demographics profile

Population density (sq mi)1225591
Median age39.338.037.7
Male/Female ratio1.1:11.0:11.0:1
Married (15yrs & older)0%60%55%
Families w/ Kids under 18n/a44%43%
Speak English89%92%79%
Speak Spanish11%4%13%
Duncan, IA has a population of 96 and is the 27,042nd largest city in the United States. The population density is 122 per sq mi which is 124% higher than the Iowa average and 35% higher than the national average. The median age in Duncan is 39 which is approximately 3% higher than the Iowa average of 38. In Duncan, 0% of the population over 15 years of age are married, 89% speak English and 11% speak Spanish. 77% of Duncan residents were born in Iowa, 0% were born out of state, 11% were born outside of the United States and 11% were foreign born.
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Did you know?

  • The population density in Duncan is 124% higher than Iowa.
  • The median age in Duncan is 3% higher than Iowa.
  • In Duncan 77.08% of the population is White.
  • In Duncan 11.46% of the population is Black or African American.
  • In Duncan 0.00% of the population is Asian.

Compare Duncan, IA Demographics To Other Cities

Duncan population breakdown by race

Black or African American11.46%3.32%12.63%
American Indian0.00%0.32%0.82%
Native Hawaiian0.00%0.08%0.18%
Mixed race11.46%1.97%3.06%
Other race0.00%1.27%4.75%
In Duncan, 11.5% 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.

Languages spoken

Place of birth by citizenship

Household income distribution

Source of income

Duncan age breakdown

Marital status

Age of children in married couples

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