Herculaneum, MO Insights: Population,
Zip Codes, Influence, and Service Areas

Herculaneum is a city in Jefferson County, Missouri, and is a suburb of St. Louis. The population was 4,273 at the 2020 United States Census. The City of Herculaneum was the first county seat of Jefferson County from January 1, 1819, to 1839. The city celebrated its bicentennial throughout 2008.

Zip Codes in Herculaneum, MO that we also serve: 63048





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