Butterfly Lake
General data
- Name: Butterfly Lake
- Water system: Missouri River
- Water type: Artificial lake
- Progression: River aux Vases -> Missouri River -> Mississippi River -> Gulf of Mexico -> Atlantic Ocean -> Planet Earth
- Climates: Temperate, Continental
- Continents: North America
- Countries: United States of America
Butterfly Lake is a reservoir in Ste. Genevieve County in the U.S. state of Missouri. Butterfly Lake was so named because its outline has the shape of a butterfly. The reservoir is 65 acres in area.