Lakes / Indiana / Marion County
Lakes in Marion County, Indiana
3 lakes counted in Marion County - the largest is Geist Reservoir at 1,863.74 acres.
3
Lakes Counted
1,863.74 acres
Largest - Geist Reservoir
Marion County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Geist Reservoir | Marion | 1,863.74 acres | - |
| 2 | Eagle Creek Reservoir | Marion | 1,268.23 acres | - |
| 3 | Indian Lake | Marion | 60.77 acres | - |
Sources: USGS National Hydrography Dataset lake data; USGS. Verified October 30, 2026.