Where is Saint Marys, Ohio

Saint Marys is a city in west-central Ohio, located in Auglaize County along the St. Marys River. It sits about 15 miles southwest of Lima and 35 miles northwest of Sidney. The city is known for Grand Lake St. Marys, its historic canal-era roots, local parks, and its location between several important communities in western Ohio.

Location Map of Saint Marys, Auglaize County, Ohio

About Map: The map shows the location of Saint Marys in Auglaize County, in the U.S. state of Ohio.

Saint Marys Map, Ohio

Where is Saint Marys Located?

Saint Marys is a city located in Auglaize County, Ohio, the United States. It lies in west-central Ohio along the St. Marys River, about 15 miles southwest of Lima and roughly 35 miles northwest of Sidney. Wapakoneta is around 10 miles southeast, while Celina is about 25 miles northwest. Saint Marys is positioned near 40.549° North latitude and 84.389° West longitude. The 2020 Census recorded 8,697 residents. The city covers about 5.71 square miles, or 14.79 square kilometers. Saint Marys was founded in 1823 and incorporated in 1834. Its early growth was linked to the Miami and Erie Canal, which passed through the community and helped establish it as a transportation and commercial center. Later, railroads and manufacturing supported continued development. A unique feature of Saint Marys is its close connection to Grand Lake St. Marys, one of Ohio's largest inland lakes. The lake was created in the 19th century as a reservoir for the canal system and now supports boating, fishing, camping, and other outdoor activities. The city also has a historic downtown with older homes, churches, and commercial buildings. Nearby attractions include Grand Lake St. Marys State Park, the Miami and Erie Canal, Memorial Park, and the Neil Armstrong Air and Space Museum in nearby Wapakoneta. US-33 and US-127 provide major transportation connections to Lima, Wapakoneta, Celina, and other western Ohio communities.

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Saint Marys City Facts

Distance from Saint Marys, OH to Nearby Cities

• New Bremen, OH – 8 miles (13 km)
• Wapakoneta, OH – 10 miles (16 km)
• Lima, OH – 15 miles (24 km)
• Minster, OH – 15 miles (24 km)
• Celina, OH – 25 miles (40 km)
• Coldwater, OH – 30 miles (48 km)
• Sidney, OH – 35 miles (56 km)
• Findlay, OH – 45 miles (72 km)
• Van Wert, OH – 40 miles (64 km)
• Delphos, OH – 25 miles (40 km)
• Greenville, OH – 55 miles (89 km)
• Fort Wayne, IN – 65 miles (105 km)
• Dayton, OH – 75 miles (121 km)
• Toledo, OH – 85 miles (137 km)
• Columbus, OH – 95 miles (153 km)
• Springfield, OH – 75 miles (121 km)
• Indianapolis, IN – 115 miles (185 km)
• Cincinnati, OH – 125 miles (201 km)

Top Attractions in Saint Marys

• Grand Lake St. Marys State Park – A large lake recreation area offering boating, fishing, swimming, camping, hiking, and wildlife viewing.
• Grand Lake St. Marys – One of Ohio's largest inland lakes, created as a reservoir for the Miami and Erie Canal in the 19th century.
• Miami and Erie Canal – Historic canal remnants and towpath areas preserve an important part of Saint Marys' early transportation history.
• Memorial Park – A community recreation area with open spaces, walking paths, sports facilities, playgrounds, and picnic areas.
• St. Marys Historic District – The city's older neighborhoods and downtown contain historic homes, churches, commercial buildings, and civic landmarks.
• Armstrong Air & Space Museum – A nearby museum in Wapakoneta honoring astronaut Neil Armstrong and exploring aviation and space history.
• Auglaize County Historical Society – A regional historical resource preserving artifacts and stories from Auglaize County communities.
• Fort Amanda State Memorial – A historic site near Lima marking the location of a War of 1812 military supply depot.
• Lake Loramie State Park – A nearby recreation area with a lake, boating, fishing, camping, hiking, and picnic facilities.

Airports Near Saint Marys, OH

• Lima Allen County Airport (AOH) – 20 miles
• Neil Armstrong Airport (AXV) – 35 miles
• Lakefield Airport (CQA) – 30 miles
• Dayton International Airport (DAY) – 75 miles
• Toledo Express Airport (TOL) – 90 miles

Sources:

Population and area data sourced from the United States Census Bureau (2020 Census). General city information referenced from the official Saint Marys city website and local government records.

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