| Sam Rayburn Reservoir | |
|---|---|
  Sam Rayburn Reservoir  Sam Rayburn Reservoir | |
| Location | Angelina/ Nacogdoches/ San Augustine / Jasper / Sabine counties, Southeast Texas |
| Coordinates | 31°03′40″N 94°06′22″W / 31.06111°N 94.10611°W |
| Type | reservoir |
| Primary inflows | Angelina River |
| Primary outflows | Angelina River |
| Catchment area | 3,449 sq mi (8,930 km2) |
| Basin countries | United States |
| Max. length | 36.43 miles (58.63 km) |
| Max. width | 4.29 miles (6.90 km) |
| Surface area | 114,500 acres (463 km2) |
| Max. depth | 80 feet (24 m) |
| Water volume | 1,140,500 acre⋅ft (1.4068 km3) |
| Surface elevation | 164 ft (50 m) |
| Islands | numerous islands and islets |
Sam Rayburn Reservoir is a reservoir in the United States in Deep East Texas, 70 miles (110 km) north of Beaumont. The reservoir is fed by the Angelina River, the major tributary of the Neches River. The Reservoir is upstream of the Big Thicket National Preserve.
The reservoir's capacity is 3,997,600 acre-feet (4.9310×109 m3), and is the largest lake wholly within the state of Texas. It is the ninth largest reservoir in the United States. Sam Rayburn Reservoir is operated by the United States Army Corps of Engineers, Fort Worth district.