'Jo Daviess County, IL' definitions:

Jo Daviess -- U.S. County in Illinois

From: Gazetteer 2000
Name :
Jo Daviess -- U.S. County in Illinois
Population (2000) :
22289
Housing Units (2000) :
12003
Land area (2000) :
601.080121 sq. miles (1556.790300 sq. km)
Water area (2000) :
17.635108 sq. miles (45.674718 sq. km)
Total area (2000) :
618.715229 sq. miles (1602.465018 sq. km)
Located within :
Illinois (IL), FIPS 17
Location :
42.393139 N, 90.235822 W