Clayton County's 2026 population is estimated at 16,823, reflecting a -0.32% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Clayton County is the 43rd largest county in Iowa. The 2010 population was 18,080 and has grown -6.95% since 2010.
Data after 2023 is projected based on recent change
Overall: 46.4 years
Female: 46.5 years
Male: 46.1 years
There are 13,333 adults, (4,260 of whom are seniors) in Clayton County.
Female: 8,451 (49.7%)
Male: 8,562 (50.3%)
The racial composition of Clayton County includes 94.98% White, and smaller percentages for Black or African American, other race, Asian, Native American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 16,159 | 94.98% |
| Two or more races | 581 | 3.42% |
| Black or African American | 112 | 0.66% |
| Other race | 95 | 0.56% |
| Asian | 56 | 0.33% |
| Native American | 10 | 0.06% |
Clayton County 's average per capita income is $48,625. Household income levels show a median of $67,242. The poverty rate stands at 10.91%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $96,890 | - |
| Families | $82,522 | $102,405 |
| Households | $67,242 | $86,441 |
| Non Families | $42,610 | $57,378 |
Average Income
Median Household Income
Poverty Rate
