Seaford, DE -- U.S. city in Delaware Population (2000): 6699 Housing Units (2000): 2809 Land area (2000): 3.478449 sq. miles (9.009140 sq. km) Water area (2000): 0.035778 sq. miles (0.092665 sq. km) Total area (2000): 3.514227 sq. miles (9.101805 sq. km) FIPS code: 64320 Located within: Delaware (DE), FIPS 10 Location: 38.644654 N, 75.616107 W ZIP Codes (1990): 19973 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Seaford, DE Seaford