Ionia, IA has a population of 332 and is the 21,923rd largest city in the United States. The population density is 603 per sq mi which is 958% higher than the Iowa average and 566% higher than the national average. The median age in Ionia is 36 which is approximately 4% lower than the Iowa average of 38. In Ionia, 69% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 91% of Ionia residents were born in Iowa, 9% 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 Ionia is 958% higher than Iowa.
The median age in Ionia is 4% lower than Iowa.
In Ionia 100.00% of the population is White.
In Ionia 0.00% of the population is Black or African American.