Castalia, IA has a population of 188 and is the 24,738th largest city in the United States. The population density is 326 per sq mi which is 496% higher than the Iowa average and 259% higher than the national average. The median age in Castalia is 53 which is approximately 40% higher than the Iowa average of 38. In Castalia, 65% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 83% of Castalia residents were born in Iowa, 16% were born out of state, 0% were born outside of the United States and 1% were foreign born.
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The population density in Castalia is 496% higher than Iowa.
The median age in Castalia is 40% higher than Iowa.
In Castalia 100.00% of the population is White.
In Castalia 0.00% of the population is Black or African American.