St John is located in Missouri. St John, Missouri has a population of 6,742. St John is less family-centric than the surrounding county with 25% households with children. The county percentage for households with children is 27%.
The median household income in St John, Missouri is $54,075. The median household income for the surrounding county is $69,900 compared to the national median of $66,222. The median age of people living in St John is 39.3 years.
The average high temperature in July is 89.8 degrees, with an average low temperature in January of 21.2 degrees. The annual precipitation is 38.75.