Duval -- U.S. County in Texas Population (2000): 13120 Housing Units (2000): 5543 Land area (2000): 1792.706185 sq. miles (4643.087506 sq. km) Water area (2000): 2.967644 sq. miles (7.686162 sq. km) Total area (2000): 1795.673829 sq. miles (4650.773668 sq. km) Located within: Texas (TX), FIPS 48 Location: 27.712895 N, 98.514443 W Headwords: Duval Duval, TX Duval County Duval County, TX