St John is located in Indiana. St John, Indiana has a population of 16,391. St John is more family-centric than the surrounding county with 39.42% of the households containing married families with children. The county average for households married with children is 27.3%.
The median household income in St John, Indiana is $103,701. The median household income for the surrounding county is $52,559 compared to the national median of $57,652. The median age of people living in St John is 43.6 years.
The average high temperature in July is 83.9 degrees, with an average low temperature in January of 15.6 degrees. The average rainfall is approximately 39.6 inches per year, with 27.8 inches of snow per year.
