Herculaneum, MO -- U.S. city in Missouri Population (2000): 2805 Housing Units (2000): 1078 Land area (2000): 3.438353 sq. miles (8.905293 sq. km) Water area (2000): 0.046609 sq. miles (0.120718 sq. km) Total area (2000): 3.484962 sq. miles (9.026011 sq. km) FIPS code: 31708 Located within: Missouri (MO), FIPS 29 Location: 38.259247 N, 90.387790 W ZIP Codes (1990): 63048 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Herculaneum, MO Herculaneum