St Marys is located in Indiana. St Marys, Indiana has a population of 3,290.
The median household income in St Marys, Indiana is $24,000. The median household income for the surrounding county is $58,599 compared to the national median of $69,021. The median age of people living in St Marys is 20.1 years.
The average high temperature in July is 82.6 degrees, with an average low temperature in January of 15.9 degrees. The average rainfall is approximately 39.6 inches per year, with 64.1 inches of snow per year.