The Harry S. Truman Dam and Reservoir, also known as Truman Lake, is located in the state of Missouri, United States. It is located between Clinton and Warsaw, on the Osage River and extends south to Osceola. The dam is located in Benton County, but the reservoir also extends into parts of Henry, St. Clair, and Hickory counties.
Location: Benton, Henry, Hickory, and St. Clair counties, Missouri, U.S.
Etymology: U.S. President Harry S. Truman
Primary inflows: Osage River
Primary outflows: Osage River
Basin countries: United States
Managing agency: U.S. Army Corps of Engineers
Surface area: 55,600 acres (225 km²), or 200,000 acres (810 km²) at flood stage