Lakes / Pennsylvania / Lancaster County
Lakes in Lancaster County, Pennsylvania
4 lakes counted in Lancaster County - the largest is Chester Octoraro Reservoir at 669 acres.
4
Lakes Counted
669 acres
Largest - Chester Octoraro Reservoir
Lancaster County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Chester Octoraro Reservoir | Lancaster | 669 acres | None |
| 2 | Middle Creek Reservoir | Lancaster | 361 acres | None |
| 3 | Speedwell Forge Lake | Lancaster | 106 acres | None |
| 4 | Muddy Run Recreation lake | Lancaster | 98 acres | None |
Sources: Pennsylvania Fish and Boat Commission lake data; USGS. Verified October 28, 2026.