St Marys Real EstateSt Marys is located in Ohio. St Marys, Ohio has a population of 8,143. St Marys is less family-centric than the surrounding county with 28.03% of the households containing married families with children. The county average for households married with children is 31.16%. The median household income in St Marys, Ohio is $48,661. The median household income for the surrounding county is $59,516 compared to the national median of $57,652. The median age of people living in St Marys is 36 years. St Marys WeatherThe average high temperature in July is 83.8 degrees, with an average low temperature in January of 19 degrees. The average rainfall is approximately 38.4 inches per year, with 13.3 inches of snow per year. St Marys MapReal estate near St MarysNearby CitiesNearby Cities Homes for Sale |