Herscher is a village in Kankakee County, Illinois, United States. The population was 1,521 at the 2020 census. It is part of the Kankakee–Bradley metropolitan area. Herscher is located in southwestern Kankakee County. Illinois Route 115 forms the northern edge of the village; the highway leads east 16 miles to Kankakee, the county sea…Herscher is a village in Kankakee County, Illinois, United States. The population was 1,521 at the 2020 census. It is part of the Kankakee–Bradley metropolitan area. Herscher is located in southwestern Kankakee County. Illinois Route 115 forms the northern edge of the village; the highway leads east 16 miles to Kankakee, the county seat, and southwest 26 miles to Piper City.