Duncombe, IA has a population of 313 and is the 22,275th largest city in the United States. The population density is 156 per sq mi which is 185% higher than the Iowa average and 72% higher than the national average. The median age in Duncombe is 43 which is approximately 14% higher than the Iowa average of 38. In Duncombe, 46% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 84% of Duncombe residents were born in Iowa, 16% were born out of state, 0% were born outside of the United States and 0% were foreign born.
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The population density in Duncombe is 185% higher than Iowa.
The median age in Duncombe is 14% higher than Iowa.
In Duncombe 100.00% of the population is White.
In Duncombe 0.00% of the population is Black or African American.