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The 2009 Clayton County, IA, population is 17,685. There are 24 people per square mile (population density).
The median age is 41.6. The US median is 37.6. 62.05% of people in Clayton County, IA, are married. 8.51% are divorced.
The average household size is 2.38 people. 24.54% of people are married, with children. 6.22% have children, but are single.
99.16% of people are white, 0.11% are black, 0.14% are asian, 0.26% are native american, and 0.56% claim 'Other'.
0.94% of the people in Clayton County, IA, claim hispanic ethnicity (meaning 99.06% are non-hispanic).
Clayton, IA People data
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