In 2018, Clayton County, IA had a population of 17.7k people with a median age of 47.1 and a median household income of $52,828. Between 2017 and 2018 the population of Clayton County, IA declined from 17,711 to 17,672, a -0.22% decrease and its median household income grew from $51,114 to $52,828, a 3.35% increase.
The 5 largest ethnic groups in Clayton County, IA are White (Non-Hispanic) (96%), White (Hispanic) (1.41%), Black or African American (Non-Hispanic) (1.02%), Asian (Non-Hispanic) (0.447%), and Two+ (Non-Hispanic) (0.407%). 0% of the households in Clayton County, IA speak a non-English language at home as their primary language, and 98.8% of the residents in Clayton County, IA are U.S. citizens.
In 2018, the median property value in Clayton County, IA was $121,000, and the homeownership rate was 75%. Most people in Clayton County, IA drove alone to work, and the average commute time was 20.6 minutes. The average car ownership in Clayton County, IA was 2 cars per household.