Lakes / Tennessee / Franklin County / Duncan Lake
Duncan Lake, Tennessee
50 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Tennessee
35.27 degrees N, 86.08 degrees W - Franklin 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 Duncan Lake Stacks Up
- Larger than 40% of the 249 lakes counted in Tennessee.
- About 46 miles from Chattanooga, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Woods Reservoir | Franklin | 2.9 mi | 3,628 acres |
| AEDC Retention Reservoir | Coffee | 7.5 mi | 94 acres |
| Tims Ford Lake | Franklin | 8.2 mi | 7,745 acres |
| Lake Tullahoma | Coffee | 11 mi | 36 acres |
| Goose Pond | Grundy | 12 mi | 27 acres |
| Day Lake | Franklin | 13 mi | 86 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Duncan Lake
How Big Is Duncan Lake?
Duncan Lake covers 50 acres in Franklin County, Tennessee.
What Is the Largest Lake in Franklin County?
Tims Ford Lake is the largest lake in Franklin County, at 7,745 acres.
Largest Lakes in Tennessee
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Kentucky Lake | Henry | 144,085 acres | - |
| 2 | Watts Bar Lake | Roane | 33,441 acres | - |
| 3 | Cherokee Lake | Hamblen | 29,436 acres | - |
| 4 | Douglas Lake | Jefferson | 29,224 acres | - |
| 5 | Chickamauga Lake | Hamilton | 27,237 acres | - |
All 249 Tennessee 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 138657323). Verified October 30, 2026.