Clayton is a city of 602 people in Illinois. 6% of adults hold a bachelor's degree, below the 36% national rate. At a median age of 49.2, this is an older place than the country as a whole. Home values have more than doubled since 2000, reaching $91,500. 0% of residents were born outside the United States. There are 302 fewer people here than in 2000.
At a glance
Lower income
median household income $66,136, below the US median
US median: $82,259
Older
median age 49.2
US median: 38.9
Less educated
6% hold a bachelor's degree
US average: 36%
Less affordable
home values up 41%, inflation adjusted
US median home: $376,019
Unique to this place
What stands out about Clayton
What changed most since 1990
Median household income (2024 dollars)$34,304 → $66,136(+93%)US over the same years: +14%
Population732 → 602(−18%)US over the same years: +35%
Black share0.0% → 10.5%(+10.5 pts)US over the same years: +0.2 pts
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)4.5%(2)
US avg: 26.4%
Gulf War (1990s)18.2%(8)
US avg: 24.3%
Vietnam era61.4%(27)
US avg: 33.1%
Korean War6.8%(3)
US avg: 4.5%
World War II0%(0)
US avg: 1%
Share of the 44 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, decade by decade
Clayton 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
732
$34,304
$62,882
3.9%
1.0
2000
904
$42,038
$65,033
5.1%
31.8
2010
709
$46,305
$72,504
2.9%
4.9
2020
639
$54,036
$91,145
7.1%
19.1
2024
602
$66,136
$91,500
5.7%
29.9
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.
