Grand Lake St. Marys Campground
Open year-round. Reservations available up to six months in advance through ReserveOhio.
Flood Watch issued August 10 at 1:04PM EDT until August 12 at 8:00AM EDT by NWS Wilmington OH
* WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...Portions of Indiana, including the following counties, Dearborn, Fayette, Franklin, Union and Wayne, Kentucky, including the following counties, Boone, Bracken, Campbell, Kenton, Lewis, Mason, Pendleton and Robertson, and Ohio, including the following counties, Adams, Auglaize, Brown, Butler, Champaign, Clark, Clermont, Clinton, Darke, Delaware, Fairfield, Fayette, Franklin, Greene, Hamilton, Hardin, Highland, Hocking, Licking, Logan, Madison, Mercer, Miami, Montgomery, Pickaway, Pike, Preble, Ross, Scioto, Shelby, Union and Warren. * WHEN...Through Wednesday morning. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Several rounds of thunderstorms are expected through Tuesday night. Locally heavy rainfall can be expected with the potential for storms to repeatedly track over the same locations. This will result in the potential for flash flooding.
About
Grand Lake St. Marys State Park Campground is located on the shores of Grand Lake St. Marys, Ohio's largest inland lake at 13,500 acres, straddling Mercer and Auglaize counties in western Ohio. The campground offers a diverse mix of around 200 campsites: 148 electric sites, 33 full hookup sites with water and sewer, and 10 standard non-electric sites, plus seven rustic rental cabins with lake views. All roads and site pads are paved, with both pull-through and back-in options available. Facilities are extensive for a state park campground. Modern restrooms feature flush toilets and hot showers. A full-service camp store offers supplies and bike rentals, and loans fishing gear and games to registered campers. Recreation options include a swimming pool with splash pad, playground, horseshoe pits, and mini golf. Boat docks provide direct lake access for fishing and boating, though swimming in the lake itself is prohibited due to water quality concerns. Each campsite includes a fire ring, grill, and picnic table. Reservations can be made up to six months in advance through ReserveOhio or by calling (866) 644-6727. The campground operates year-round and welcomes RVs, though reviewers note that pull-through sites work best for units under 35 feet if towing a vehicle.
Directions
From I-75, take US-33 west toward St. Marys. The park entrance is located off State Route 703 on the east side of Grand Lake St. Marys, approximately 3 miles west of St. Marys.
Nearby Campgrounds
Amenities
| Water | Yes |
| Fires Allowed | Yes |
| Toilets | Yes |
| Dump Station | Yes |
| Wifi | — |
| Pets Allowed | Yes |
| Showers | Yes |
| Electric Hookups | Yes |
| Water Hookups | Yes |
| Sewer Hookups | Yes |
| Camp Store | Yes |
| Price | $29 - $660 |
Vehicle
| Max RV Length | 62ft |
| Max Trailer Length | — |
| Big Rig Friendly | No |
| Pull Through Sites | Yes |
Contact
| Phone | +1 (866) 644-6727 |
Cell Service
| AT&T | Yes |
| Verizon | Yes |
| T-Mobile | Yes |
Useful Links
| ODNR Campground Page | |
| ODNR Campground Map (PDF) |
Availability
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