Sebago Lake, Maine
30,536 acres
Surface Area
316 ft
Max Depth
107 ft
Average Depth
98.2 mi
Shoreline
263 ft
Surface Elevation
Where It Sits, and How Deep It Goes
Locator - Maine
43.86 degrees N, 70.57 degrees W - Cumberland County. State and county outlines drawn from Census boundary data; the lake marker is placed by its Maine DEP coordinates, not by eye. Schematic - not a survey map.
Depth Profile - Sebago Lake
Schematic cross-section drawn to one shared depth scale - not a survey or bathymetric map.
How Sebago Lake Stacks Up
- The deepest natural lake counted in Maine - 316 ft at its deepest.
- Ranks #2 for surface area among the Maine lakes counted so far - 30,536 acres.
- The largest lake in Cumberland County among those counted.
- Its average depth of 107 ft is more than 10 times a typical shallow Maine lake, which averages under 10 ft.
Facts and Figures
Lake ID (MIDAS)5786
CountyCumberland
TownsCasco, Naples, Raymond, Sebago, Standish, Windham
Lake TypeColdwater + Warmwater
Coordinates43.8645, -70.5721
Deepest Natural Lakes in Maine
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Sebago Lake | Cumberland | 30,536 acres | 316 ft |
| 2 | Moosehead Lake | Piscataquis | 75,473 acres | 246 ft |
| 3 | Tunk Lake | Hancock | 2,071 acres | 222 ft |
| 4 | Pleasant Pond | Somerset | 1,037 acres | 198 ft |
| 5 | Schoodic Lake | Piscataquis | 7,021 acres | 188 ft |
Largest Lakes in Maine
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Moosehead Lake | Piscataquis | 75,473 acres | 246 ft |
| 2 | Sebago Lake | Cumberland | 30,536 acres | 316 ft |
| 3 | Chesuncook Lake | Piscataquis | 28,250 acres | 150 ft |
| 4 | Spednic Lake | Washington | 19,618 acres | 54 ft |
| 5 | South Twin Lake | Penobscot, Piscataquis | 18,652 acres | 101 ft |
Sources: Maine DEP / Lakes of Maine lake data (ID 5786); USGS. Verified October 30, 2026.