Lockport, LA -- U.S. town in Louisiana Population (2000): 2624 Housing Units (2000): 1063 Land area (2000): 0.621660 sq. miles (1.610092 sq. km) Water area (2000): 0.019628 sq. miles (0.050837 sq. km) Total area (2000): 0.641288 sq. miles (1.660929 sq. km) FIPS code: 44900 Located within: Louisiana (LA), FIPS 22 Location: 29.642584 N, 90.539895 W ZIP Codes (1990): 70374 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Lockport, LA Lockport