Union is located in Miami County, OH. The population is 6,366, making Union the 5th largest city in Miami County.
There are 0 public schools in Union with an average Homefacts rating of A. The total crime rate for Union is very low , and there are 2 registered sex offenders residing in the city. Unemployment in Union is moderate 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 City Township, Butler Township and West Milton.