Calamus, IA has a population of 407 and is the 20,775th largest city in the United States. The population density is 843 per sq mi which is 1443% higher than the Iowa average and 830% higher than the national average. The median age in Calamus is 37 which is approximately 3% lower than the Iowa average of 38. In Calamus, 61% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 83% of Calamus residents were born in Iowa, 17% 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 Calamus is 1443% higher than Iowa.
The median age in Calamus is 3% lower than Iowa.
In Calamus 97.79% of the population is White.
In Calamus 0.98% of the population is Black or African American.