Lakes / Georgia / DeKalb County / Stone Mountain Lake
Stone Mountain Lake, Georgia
330 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Georgia
33.81 degrees N, 84.13 degrees W - DeKalb County. State and county outlines drawn from Census boundary data; the lake marker is placed by its USGS National Hydrography Dataset coordinates, not by eye. Schematic - not a survey map.
How Stone Mountain Lake Stacks Up
- Larger than 93% of the 728 lakes counted in Georgia.
- The largest lake in DeKalb County among those counted.
- About 15 miles from Atlanta, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Stone Mountain Park Lake-South | DeKalb | 1.0 mi | 35 acres |
| Lake Lucerne | Gwinnett | 2.9 mi | 37 acres |
| Norris Lake | DeKalb | 6.2 mi | 104 acres |
| Freeman Lake | Gwinnett | 7.7 mi | 55 acres |
| Gaines Lake | Rockdale | 7.8 mi | 34 acres |
| Lower Lake Capri | Rockdale | 7.8 mi | 34 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Stone Mountain Lake
How Big Is Stone Mountain Lake?
Stone Mountain Lake covers 330 acres in DeKalb County, Georgia.
What Is the Largest Lake in DeKalb County?
Stone Mountain Lake is the largest lake in DeKalb County, at 330 acres.
Largest Lakes in Georgia
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | J. Strom Thurmond Reservoir | Lincoln | 40,816 acres | - |
| 2 | Lake Sidney Lanier | Forsyth | 38,293 acres | - |
| 3 | Walter F George Reservoir | Quitman | 34,919 acres | - |
| 4 | J. Strom Thurmond Reservoir | Columbia | 25,660 acres | - |
| 5 | West Point Lake | Troup | 22,313 acres | - |
All 728 Georgia lakes ranked by surface area
Sources: USGS NHD (The National Map NHD MapServer layer 12) named waterbodies FTYPE 390/436; counties via Census point-in-polygon lake data (ID 49687745). Verified October 30, 2026.