'Clay County, IL' definitions:
Clay -- U.S. County in Illinois
From: Gazetteer 2000
Name :
Clay -- U.S. County in Illinois
Population (2000) :
14560
Housing Units (2000) :
6394
Land area (2000) :
469.248887 sq. miles (1215.348986 sq. km)
Water area (2000) :
0.589007 sq. miles (1.525520 sq. km)
Total area (2000) :
469.837894 sq. miles (1216.874506 sq. km)
Located within :
Illinois (IL), FIPS 17
Location :
38.737029 N, 88.470910 W