Herculaneum, Missouri, United States [City]; population was 2,263 in 1990; housing units was 960 in 1990; location is 38°16'N 90°23'W; land area is 3.19 square miles (2,044 acres); water area is 0.05 square miles (30 acres); FIPS code is 31708 [SourceCBP]