'DuPage County, IL' definitions:

DuPage -- U.S. County in Illinois

From: Gazetteer 2000
Name :
DuPage -- U.S. County in Illinois
Population (2000) :
904161
Housing Units (2000) :
335621
Land area (2000) :
333.605502 sq. miles (864.034248 sq. km)
Water area (2000) :
2.948389 sq. miles (7.636291 sq. km)
Total area (2000) :
336.553891 sq. miles (871.670539 sq. km)
Located within :
Illinois (IL), FIPS 17
Location :
41.856029 N, 88.063587 W