| Lake Allatoona | |
|---|---|
 Seen from Red Top Mountain State Park | |
  Lake Allatoona  Lake Allatoona | |
| Location | Georgia, United States |
| Coordinates | 34°8′18″N 84°38′38″W / 34.13833°N 84.64389°W |
| Type | reservoir |
| Primary inflows | Etowah River, Allatoona Creek, Little River, Noonday Creek |
| Primary outflows | Etowah River |
| Basin countries | United States |
| Surface area | 12,010 acres (48.6 km2) |
| Max. depth | 44.196 metres (145.00 ft) |
| Water volume | 367,500 acre⋅ft (0.4533 km3) |
| Surface elevation | 840 feet (260 m) |
| Islands | Seven Islands |
| Settlements | Cartersville, Emerson, Canton, and Acworth |
Lake Allatoona (officially called Allatoona Lake) is a U.S. Army Corps of Engineers reservoir on the Etowah River in northwestern part of the State of Georgia. This reservoir is mostly in southeastern Bartow County and southwestern Cherokee County. A small portion is located in Cobb County near Acworth.
Cartersville is the nearest city to Allatoona Dam. Also, Red Top Mountain State Park is located on its shores, on the peninsula between the two arms of the lake. Most of the north side of the lake remains protected from land development because of its isolated location, mostly blocked by the lake.
The major highways Interstate 75 and U.S. Highway 41 pass along the southern and western side of Lake Allatoona, and they cross the Etowah River downstream from the Allatoona Dam.