Johnston is located in Edgefield County, SC. The population is 2,426, making Johnston the 2nd largest city in Edgefield County.
There are 4 public schools in Johnston with an average Homefacts rating of C. The total crime rate for Johnston is low , and there are 1 registered sex offenders residing in the city. Unemployment in Johnston is moderate and the median home sales price is $0. Detailed and up-to-date Johnston property reports are available for any property address.