Duncan is a city of 21 people in Iowa. The median age is 55.3, about 16 years above the US median. 0% of adults hold a bachelor's degree, below the 36% national rate. The poverty rate is 57.1%, above the 12.5% national rate. Owners hold 0% of the housing stock. There are 20 fewer people here than in 2023.
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans
Over time
Duncan, decade by decade
Duncan population, inflation-adjusted income and home value, education, and diversity by year
Year
Population
Median household income
Median home value
Bachelor's degree+
Diversity score
2010
131
$17,582
$78,258
13.6%
7.7
2020
57
$77,151
–
20.4%
4.3
2024
21
–
–
0.0%
0.0
Census years come from the decennial census and the latest year from the American Community Survey, so part of any change between those two rows can reflect the different surveys. Dollar figures are adjusted for inflation to 2024 dollars; a figure ending in "+" was at the Census Bureau's reporting cap that year. The diversity score runs from 0 to 100; see how it's calculated.
