Gretna, NE -- U.S. city in Nebraska Population (2000): 2355 Housing Units (2000): 917 Land area (2000): 1.179758 sq. miles (3.055560 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 1.179758 sq. miles (3.055560 sq. km) FIPS code: 20260 Located within: Nebraska (NE), FIPS 31 Location: 41.138898 N, 96.244947 W ZIP Codes (1990): 68028 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Gretna, NE Gretna