St. John is located in St. Louis County, MO. The population is 6,519.
There are 0 public schools in St. John with an average Homefacts rating of NA. The total crime rate for St. John is high , and there are 0 registered sex offenders residing in the city. Unemployment in St. John is moderate and the median home sales price is $0. Detailed and up-to-date St. John property reports are available for any property address.