Clayton County is a county of 17,013 people in Iowa. Four-year degrees are less common here than nationally, at 14% of adults. The median age is 46.4, about 7 years above the US median. 78% of homes are owner-occupied. The typical home is worth $168,500, having more than doubled since 2000. The foreign-born share is 2%.
At a glance
Lower income
median household income $67,242, below the US median
US median: $82,259
Older
median age 46.4
US median: 38.9
Less educated
14% hold a bachelor's degree
US average: 36%
Less affordable
home values up 30%, inflation adjusted
US median home: $376,019
Unique to this place
What stands out about Clayton County
What changed most since 1990
White share99.4% → 95.0%(−4.5 pts)US over the same years: −17.8 pts
Adults with a bachelor's degree9.0% → 14.5%(+5.5 pts)US over the same years: +15.3 pts
Population19,054 → 17,013(−11%)US over the same years: +35%
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans
Veterans by period of service, 2024
Gulf War (2001 or later)12.2%(133)
US avg: 26.4%
Gulf War (1990s)15.5%(169)
US avg: 24.3%
Vietnam era44.2%(480)
US avg: 33.1%
Korean War6.3%(69)
US avg: 4.5%
World War II3%(33)
US avg: 1%
Share of the 1,087 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Over time
Clayton County, decade by decade
Clayton County population, inflation-adjusted income and home value, education, and diversity by year
Year
Population
Median household income
Median home value
Bachelor's degree+
Diversity score
1990
19,054
$51,376
$88,803
9.0%
1.4
2000
18,678
$62,060
$129,884
12.8%
3.9
2010
18,129
$65,992
$138,822
14.9%
7.6
2020
17,043
$68,427
$159,504
17.1%
13.2
2024
17,013
$67,242
$168,500
14.5%
12.2
Census years come from the decennial census and the latest year from the American Community Survey, so part of any change between those two rows can reflect the different surveys. Dollar figures are adjusted for inflation to 2024 dollars; a figure ending in "+" was at the Census Bureau's reporting cap that year. The diversity score runs from 0 to 100; see how it's calculated.
