File:Clay_County_Courthouse_in_Louisville_from_north-northwest.jpg · Wikimedia Commons · See Wikimedia Commons
Clay County
Sign in to saveAlso known as Clay County, Illinois, Clay County, IL
county in Illinois, United States
Key facts
- Country
- United States
- State
- Illinois
- Founded
- December 23, 1824 (created), March 8, 1825 (organized)
- Named after
- Henry Clay
- Seat
- Louisville
- Largest city
- Flora
- Total
- 469.59 sq mi (1,216.2 km )
- Land
- 468.32 sq mi (1,212.9 km )
- Water
- 1.28 sq mi (3.3 km ) 0.3%
- Estimate 2025
- 12,793
- Density
- 28.374/sq mi (10.955/km )
- Time zone
- UTC−6 ( Central )
- Summer dst
- UTC−5 ( CDT )
- Congressional district
- 12th
- Website
- claycountyillinois .org
via Wikipedia infobox
Wikidata facts
- Population
- 13288
- Area
- 1217
- Official website
- claycountyillinois.org
- Image
- Clay County Courthouse in Louisville from north-northwest.jpg
- Households
- 5607
Show 5 more facts
- Commons category
- Clay County, Illinois
- inception
- 1824-00-00
- water as percent of area
- 0.3
- native label
- Clay County
- per capita income
- 29950
Sources (8)
via Wikidata · CC0
~8 min read
Article
Clay County is a county in the southeastern portion of the U.S. state of Illinois. As of the 2020 United States census, the population was 13,288. Since 1842, its county seat has been Louisville, in the center of the county's area. In 1950, the U.S. Census Bureau placed the mean center of U.S. population in Clay County.
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