Gillham Lake
General data
- Name: Gillham Lake
- Water system: Atchafalaya River
- Water type: Artificial lake
- Progression: Cossatot River -> Little River (Red River tributary) -> Red River of the South -> Atchafalaya River -> Gulf of Mexico -> Atlantic Ocean -> Planet Earth
- Climates: Temperate
- Continents: North America
- Countries: United States of America
Gillham Lake is a small reservoir located along the Cossatot River, mostly in Howard County, but also extending westward into Polk County, Arkansas. The lake is 9.7 km from Gillham, Arkansas.