Clay County, Illinois

related topics
{household, population, female}
{county, mile, population}
{land, century, early}

Clay County is a county located in the U.S. state of Illinois, and determined by the U.S. Census Bureau to include the mean center of U.S. population in 1950. As of 2000, the population was 14,560. The county seat is Louisville.



Clay County was formed in 1824 out of portions of Wayne, Crawford, and Fayette counties. Its name is in honor of Henry Clay, famous American statesman, member of the United States Senate from Kentucky and United States Secretary of State in the 19th century. Clay was an unsuccessful candidate for President in the year the County was named.

Clay County from the time of its creation to 1831

Clay County between 1831 and 1841

Clay County was reduced to its current size in 1841 by the creation of Richland County.


According to the U.S. Census Bureau, the county has a total area of 470 square miles (1,217.3 km2), of which 469 square miles (1,214.7 km2) is land and 1 square mile (2.6 km2) (0.13%) is water.

Adjacent counties

Major highways

Full article ▸

related documents
Knox County, Illinois
Pike County, Georgia
Carroll County, Arkansas
Hancock County, Ohio
Madison County, Iowa
Bradley County, Tennessee
Livingston County, Illinois
Smyth County, Virginia
Morgan County, Tennessee
Lander County, Nevada
Defiance County, Ohio
Jasper County, Georgia
Wilcox County, Georgia
Hall County, Georgia
Terrell County, Georgia
Ripley County, Missouri
Van Wert County, Ohio
Hamilton County, Tennessee
Darlington County, South Carolina
Lanier County, Georgia
Nez Perce County, Idaho
Stephens County, Georgia
Seminole County, Georgia
Guthrie County, Iowa
Wilkes County, Georgia
Walker County, Texas
La Salle County, Texas
Muscogee County, Georgia
Hart County, Kentucky
Pendleton County, West Virginia