Clay County, Illinois

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Clay County, Illinois
Clay County Courthouse in Louisville from north-northwest.jpg
Map of Illinois highlighting Clay County
Location in the U.S. state of Illinois
Map of the United States highlighting Illinois
Illinois's location in the U.S.
Founded1824
Named forHenry Clay
SeatLouisville
Largest cityFlora
Area
 • Total470 sq mi (1,217 km2)
 • Land468 sq mi (1,212 km2)
 • Water1.3 sq mi (3 km2), 0.3%
Population
 • (2010)13,815
 • Density29/sq mi (11/km2)
Congressional district15th
Time zoneCentral: UTC−6/−5

Clay County is a county in Illinois.