Union is located in Franklin County, MO. The population is 10,220, making Union the 2nd largest city in Franklin County.
There are 6 public schools in Union with an average Homefacts rating of B. The total crime rate for Union is low , and there are 59 registered sex offenders residing in the city. Unemployment in Union is low and the median home sales price is $0. Detailed and up-to-date Union property reports are available for any property address.
Cities near Union include Union Township, Central Township and St. Clair.