Irwin, IA has a population of 328 and is the 21,999th largest city in the United States. The population density is 550 per sq mi which is 907% higher than the Iowa average and 507% higher than the national average. The median age in Irwin is 51 which is approximately 33% higher than the Iowa average of 38. In Irwin, 69% of the population over 15 years of age are married, 99% speak English and 0% speak Spanish. 71% of Irwin residents were born in Iowa, 29% 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 Irwin is 907% higher than Iowa.
The median age in Irwin is 33% higher than Iowa.
In Irwin 98.48% of the population is White.
In Irwin 0.00% of the population is Black or African American.