The median home value in Saint Marys, OH is $180,000. The national median home value is $338,100. The average price of homes sold in Saint Marys, OH is $180,000. Saint Marys real estate listings include condos, townhomes, and single family homes for sale. Commercial properties are also available. If you see a property you’re interested in, contact a Saint Marys real estate agent to arrange a tour today!