'Knox County, IN' definitions:

Knox -- U.S. County in Indiana

From: Gazetteer 2000
Name :
Knox -- U.S. County in Indiana
Population (2000) :
39256
Housing Units (2000) :
17305
Land area (2000) :
515.834254 sq. miles (1336.004527 sq. km)
Water area (2000) :
8.221806 sq. miles (21.294379 sq. km)
Total area (2000) :
524.056060 sq. miles (1357.298906 sq. km)
Located within :
Indiana (IN), FIPS 18
Location :
38.697416 N, 87.418937 W