Decatur City, IA has a population of 205 and is the 24,337th largest city in the United States. The population density is 516 per sq mi which is 844% higher than the Iowa average and 469% higher than the national average. The median age in Decatur City is 37 which is approximately 3% lower than the Iowa average of 38. In Decatur City, 65% of the population over 15 years of age are married, 90% speak English and 3% speak Spanish. 62% of Decatur City residents were born in Iowa, 38% 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 Decatur City is 844% higher than Iowa.
The median age in Decatur City is 3% lower than Iowa.
In Decatur City 99.02% of the population is White.
In Decatur City 0.00% of the population is Black or African American.