St. Mary is located in Ste. Genevieve County, MO. The population is 376, making St. Mary the 4th largest city in Ste. Genevieve County.
There are 0 public schools in St. Mary with an average Homefacts rating of NA. The total crime rate for St. Mary is very low , and there are 0 registered sex offenders residing in the city. Unemployment in St. Mary is low and the median home sales price is $0. Detailed and up-to-date St. Mary property reports are available for any property address.
Cities near St. Mary include Kaskaskia, Saline Township and Lithium.