Grand Lake St Mary's
Mercer County, Ohio
13,356.1
Acres
140.3 mi
Shoreline
1
Fish Species
0
Local Guides
Depth Maps & Lake Info
Map & Directions
Get DirectionsShowing 9 nearby bait & tackle shops on the map.
Nearby Bait & Tackle
Nearby Marinas
Fish Species
Species known to inhabit Grand Lake St Mary's. Click any species for a full fishing guide.
Recent Stocking
Fish stocking data from the Ohio DNR hatchery program.
| Species | Year | Size Class | Quantity |
|---|---|---|---|
| Saugeye | 2024 | Fry | 2,500,000 |
| Saugeye | 2024 | Fingerling | 200,000 |
| Saugeye | 2023 | Fry | 2,200,000 |
| Saugeye | 2022 | Fry | 2,000,000 |
Plan Your Trip to Grand Lake St Mary's
- Weather forecast for Grand Lake St Mary's — check wind, rain, and temperature before you go
- GPS: 40.5178°N, 84.5002°W — Get Directions
- View on Ohio DNR Map Viewer for the latest survey data and lake info
- Review Ohio fishing regulations for season dates and limits
- An Ohio fishing license is required for ages 16+ — buy online at ohiodnr.gov
Data sourced from Ohio DNR Division of Wildlife. Last verified: March 19, 2026. Learn how we maintain this data.