Lakes / Pennsylvania / Columbia County
Lakes in Columbia County, Pennsylvania
5 lakes counted in Columbia County - the largest is Mcwilliams Reservoir at 183 acres.
5
Lakes Counted
183 acres
Largest - Mcwilliams Reservoir
Columbia County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Mcwilliams Reservoir | Columbia | 183 acres | None |
| 2 | Briar Creek Lake | Columbia | 50 acres | None |
| 3 | Klines Reservoir | Columbia | 32 acres | None |
| 4 | Grisco Swamp | Columbia | 27.9 acres | None |
| 5 | Wenner Swamp | Columbia | 27.4 acres | None |
Sources: Pennsylvania Fish and Boat Commission lake data; USGS. Verified October 28, 2026.