Johnston City is located in Williamson County, IL. The population is 3,557, making Johnston City the 5th largest city in Williamson County.
There are 5 public schools in Johnston City with an average Homefacts rating of C+. The total crime rate for Johnston City is high , and there are 1 registered sex offenders residing in the city. Unemployment in Johnston City is very high and the median home sales price is $0. Detailed and up-to-date Johnston City property reports are available for any property address.
Cities near Johnston City include Whiteash, Spillertown and Freeman Spur.