Clayton, IA has a population of 39 and is the 28,409th largest city in the United States. The population density is 79 per sq mi which is 44% higher than the Iowa average and 13% lower than the national average. The median age in Clayton is 65 which is approximately 71% higher than the Iowa average of 38. In Clayton, 56% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 77% of Clayton residents were born in Iowa, 23% 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 Clayton is 44% higher than Iowa.
The median age in Clayton is 71% higher than Iowa.
In Clayton 100.00% of the population is White.
In Clayton 0.00% of the population is Black or African American.