Grand Lake St Marys


Park Office Location & Mailing Address: 834 Edgewater Drive
St. Marys, OH 45885


N 40° 31' 37.12", W 84° 28' 15.45"

Ohio State Parks for All AgesGrand Lake St Mary's is well known for its boating. One of the largest man-made lakes, this family vacation spot has camping, boating and 4 beaches.








Park Office 419-394-3611
Camp Office 419-394-2774
Reservations for Camping, Getaway Rentals, & Shelters 866-644-6727

Reserve Online:  





176 electric sites

  • 28 non-electric sites
  • Facilities include flush toilets, laundry, showers and a dump station.
  • Pets are permitted except for the area in and around the Getaway Rentals
  • Free WiFi access is available at the camp store to registered campers
  • Separate swimming beach, boat launch and boat docks/tie-ups are available to registered campers
  • Seasonal naturalist programs are offered on weekends Memorial Day through Labor Day
  • Full-service camp store loans games, fishing and sporting equipment to registered campers
  • Bike rentals and miniature golf course

Getaway Rentals  


  • 5 air-conditioned Camper Cabins may be rented April through October
  • 2 spacious Cedar Cabins with all the amenities of a fully-equipped RV are also available for daily or weekly rental
  • Pets are not permitted in the Getaway Rental units or area


  • Boats of unlimited horsepower are permitted on the 13,500-acre lake
  • 8 state-operated launch ramps provide access to the lake
  • Several private launch ramps also exist along the shallow shoreline
  • Seasonal dock rentals are available, call the park office for information
  • A 300 foot no-wake zone has been established and is enforced around the lake's 52 miles of shoreline
  • The state wildlife refuge, located on the southwest corner, is off limits to boats at all times


  • Year-round fishing offers crappie, bass, bluegill, walleye and yellow perch
  • Valid Ohio fishing license is required


  • 4 public swimming beaches as well as other swimming areas provided for boaters


  • 9 Picnic areas with tables and grills are located in scenic areas around the lake
  • 4 picnic shelters can be reserved online or by calling 866-644-6727


  • Limited hunting is permitted in designated areas, hunting maps are available in the park office
  • 70 seasonal duck blinds are available by a lottery administered by ODNR Division of Wildlife
  • Valid Ohio hunting license is required

Winter Recreation (conditions permitting)

  • Snowmobiling
  • Cross country skiing

More To Do

  • Basketball and volleyball courts
  • Horseshoe pits
  • Playground equipment
  • Nature center offers programs during the summer
  • Fur-Ever Friends Dog Park , thanks to the efforts of the volunteers of the Fur-Ever Friends Dog Park and the Celina Rotary Dog Park of the West Bank, is open and offers a place for your pets to frolic without a leash

Nearby Attractions:

  • Lake Loramie State Park, southeast of Grand Lake St. Marys, offers fishing, boating, swimming and camping.
  • The Miami-Erie Trail, a 47-mile portion of the statewide Buckeye Trail, begins at Lake Loramie and passes within a mile and a half of Grand Lake St. Marys State Park • The Miami-Erie Trail terminates at Delphos, approximately 22 miles north of St. Marys
  • St. Marys Fish Hatchery, located on the lake's eastern shore is operated by the ODNR Division of Wildlife • The hatchery raises saugeye, walleye, channel catfish and bass for distribution in the public fishing waters of the state
  • The Neil Armstrong Air and Space Museum is located in Wapakoneta, Armstrong's boyhood home
  • For more information on area attractions, visit