Lakes / Maryland / Montgomery County / Little Seneca Lake
Little Seneca Lake, Maryland
480 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Maryland
39.19 degrees N, 77.30 degrees W - Montgomery 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 Little Seneca Lake Stacks Up
- Ranks #7 for surface area among the Maryland lakes counted so far - 480 acres.
- About 16 miles from Frederick, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Clopper Lake | Montgomery | 4.4 mi | 54 acres |
| Lake Whetstone | Montgomery | 5.7 mi | 29 acres |
| Lake Bernard Frank | Montgomery | 12 mi | 52 acres |
| Triadelphia Reservoir | Montgomery | 15 mi | 794 acres |
| Dalecarlia Reservoir | Montgomery | 20 mi | 41 acres |
| Rocky Gorge Reservoir | Montgomery | 21 mi | 655 acres |
Straight-line distance between lake centers.
Facts and Figures
Waterbody ID{39298F52-26F0-4B5C-82CB-A07B950CEB28}
CountyMontgomery
Lake TypeLake
Coordinates39.1921, -77.3020
Questions About Little Seneca Lake
How Big Is Little Seneca Lake?
Little Seneca Lake covers 480 acres in Montgomery County, Maryland.
What Is the Largest Lake in Montgomery County?
Triadelphia Reservoir is the largest lake in Montgomery County, at 794 acres.
Largest Lakes in Maryland
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Deep Creek Lake | Garrett | 3,679 acres | - |
| 2 | Liberty Lake | Carroll | 2,920 acres | - |
| 3 | Loch Raven Reservoir | Baltimore | 2,200 acres | - |
| 4 | Prettyboy Reservoir | Baltimore | 1,508 acres | - |
| 5 | Triadelphia Reservoir | Montgomery | 794 acres | - |
All 78 Maryland 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 {39298F52-26F0-4B5C-82CB-A07B950CEB28}). Verified October 30, 2026.