Thornton, IA has a population of 482 and is the 19,753rd largest city in the United States. The population density is 387 per sq mi which is 578% higher than the Iowa average and 327% higher than the national average. The median age in Thornton is 38 which is approximately 1% lower than the Iowa average of 38. In Thornton, 60% of the population over 15 years of age are married, 98% speak English and 2% speak Spanish. 77% of Thornton residents were born in Iowa, 22% 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 Thornton is 578% higher than Iowa.
The median age in Thornton is 1% lower than Iowa.
In Thornton 96.68% of the population is White.
In Thornton 1.04% of the population is Black or African American.