St Marys is located in Ohio. St Marys, Ohio has population of 8,375. St Marys is more family-centric than the surrounding county with 32% of the households with children.
The median household income in St Marys, Ohio is $59,734. The median household income for the surrounding county is $64,875 compared to the national median of $66,222. The median age of people living in St Marys is 39.6 years.
The average high temperature in July is 84.5 degrees, with an average low temperature in January of 17.9 degrees. The annual precipitation is 35.13.
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