Table of contents
Overview
3About St. Marys, OH
St. Marys sits 45 miles northwest of Dayton in rural Ohio farmland. Take I-75 north to SR-29 west from Dayton, or SR-117 south from Lima for a 30-mile scenic drive. The town of 8,300 borders Grand Lake St. Marys State Park, home to Ohio's largest inland beach on a 13,500-acre man-made lake from the 1840s canal era.
Where is St. Marys, OH on the map?
St. Marys, OH is in United States, at 40.548, -84.393 - about 11 km north-west of New Knoxville, OH.
How far is St. Marys, OH from where I am?
Use your device location to see the distance to St. Marys, OH, how long the drive takes, and directions from where you are.
Book
2Find hotels in St. Marys, OH
Rent a car near St. Marys, OH
Play
2Race a go-kart track in St. Marys, OH
Race a go-kart track generated from the real streets of St. Marys, OH.
St. Marys BendHardPlay a pub crawl round in St. Marys, OH
Nine holes from pub to pub through the real streets of St. Marys, OH. Every cup is a bar somebody actually drinks in.
Explore
2Popular destinations close by
Nearby essentials
What is the closest airport to St. Marys, OH?
The closest airport to St. Marys, OH is James M. Cox Dayton International Airport, 103 km (about 1 h 16 min by car).