Herculaneum, MO is a city located in Jefferson County, Missouri and has a land area of 3.62 square miles (9.38 km2). The water area for the city is 0.35 square miles or 0.91 km2. There is one unique zip code in Herculaneum, Missouri and it is 63048. The area code(s) for Herculaneum is 636.
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