'Lake County, IN' definitions:

Lake -- U.S. County in Indiana

From: Gazetteer 2000
Name :
Lake -- U.S. County in Indiana
Population (2000) :
484564
Housing Units (2000) :
194992
Land area (2000) :
496.984821 sq. miles (1287.184722 sq. km)
Water area (2000) :
129.358041 sq. miles (335.035775 sq. km)
Total area (2000) :
626.342862 sq. miles (1622.220497 sq. km)
Located within :
Indiana (IN), FIPS 18
Location :
41.529603 N, 87.395253 W