what county hartwell, ga in
Hartwell, Georgia. Homefacts City Report. Hartwell is located in Hart County, GA. The population is 4,482, making Hartwell the largest city in Hart County. There are 5 public schools in Hartwell with an average Homefacts rating of C+. The total crime rate for Hartwell is moderate, and there are 46 registered sex offenders residing in the city.