what county is riverton il
Homefacts City Report. Riverton is located in Sangamon County, IL. The population is 3,451, making Riverton the 7th largest city in Sangamon County. There are 3 public schools in Riverton with an average Homefacts rating of B-. The total crime rate for Riverton is very low, and there are 6 registered sex offenders residing in the city.