St Mary is located in Missouri. St Mary, Missouri has a population of 340. St Mary is less family-centric than the surrounding county with 15% households with children. The county percentage for households with children is 25%.
The median household income in St Mary, Missouri is $52,155. The median household income for the surrounding county is $62,711 compared to the national median of $66,222. The median age of people living in St Mary is 41.8 years.
The average high temperature in July is 88.36 degrees, with an average low temperature in January of 18.99 degrees. The annual precipitation is 42.04.