Lakes / Ohio / Delaware County
Lakes in Delaware County, Ohio
5 lakes counted in Delaware County - the largest is Alum Creek Lake at 3,331 acres.
5
Lakes Counted
3,331 acres
Largest - Alum Creek Lake
60 ft
Deepest - Alum Creek Lake
Delaware County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Alum Creek Lake | Delaware | 3,331 acres | 60 ft |
| 2 | Hoover Reservoir | Delaware | 2,883 acres | 60 ft |
| 3 | Delaware Lake | Delaware | 1,215 acres | 30 ft |
| 4 | O'Shaughnessy Reservoir | Delaware | 896 acres | 40 ft |
| 5 | Westerville Reservoir | Delaware | 56 acres | None |
Sources: Ohio DNR lake data; USGS. Verified October 28, 2026.