Frontenac is located in St. Louis County, MO. The population is 3,473.
There are 0 public schools in Frontenac with an average Homefacts rating of NA. The total crime rate for Frontenac is low , and there are 0 registered sex offenders residing in the city. Unemployment in Frontenac is moderate and the median home sales price is $0. Detailed and up-to-date Frontenac property reports are available for any property address.