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is an unincorporated community in southeast Missouri. It is located in Reynolds County on Routes 21, 49, and 72 near the Black River. It is known as a popular tourist destination due to its beautiful river.
On December 14, 2005, approximately 1.5 billion gallons of water flowed from a breach of the Upper Taum Sauk Lake reservoir, north of Lesterville. The reservoir is the source of the Taum Sauk pumped storage plant, a pumped-storage hydroelectric plant owned by AmerenUE. As a result of the breach, Lesterville was voluntarily evacuated.