Sardis Lake is a 98,520-acre (398.7 km2) reservoir on the Tallahatchie River in Lafayette, Panola, and Marshall counties, Mississippi.

[1] Sardis Dam was the first of the Yazoo River headwaters projects to be built by the federal government for flood control.

Construction took four years and required thousands of men to clear fourteen miles (23 km) along the Tallahatchie River, which was characterized by dense woods and undergrowth, and meandering sloughs.

The U.S. Army Corps of Engineers built and operated the "Pontotoc", a special dredge powered by two 3,000 hp (2,200 kW) electric motors to accomplish this task.

This permits spring rains across the lake's 1,545 square miles (4,000 km2) watershed to fill the reservoir without flooding downstream.