Plain City is located in Union County, OH. The population is 3,750, making Plain City the 2nd largest city in Union County.
There are 5 public schools in Plain City with an average Homefacts rating of A-. The total crime rate for Plain City is low , and there are 17 registered sex offenders residing in the city. Unemployment in Plain City is low and the median home sales price is $0. Detailed and up-to-date Plain City property reports are available for any property address.