'Duval County, FL' definitions:

Duval -- U.S. County in Florida

From: Gazetteer 2000
Name :
Duval -- U.S. County in Florida
Population (2000) :
778879
Housing Units (2000) :
329778
Land area (2000) :
773.667651 sq. miles (2003.789932 sq. km)
Water area (2000) :
144.569810 sq. miles (374.434073 sq. km)
Total area (2000) :
918.237461 sq. miles (2378.224005 sq. km)
Located within :
Florida (FL), FIPS 12
Location :
30.320873 N, 81.638873 W