Deer Grove, IL

Deer Grove is a village in Whiteside County, Illinois, United States. The 2020 census counted 38 residents. A man named William Renner and his family are believed to have been the first to settle in the area now known as Hahnaman Township, arriving from Pennsylvania in 1841. A post office was established in 1873. That mix gives Deer Grove a clear local shape within Illinois, with older layers still visible in current places. The local scoop is a place whose streets, landmarks, and institutions keep its earlier story close to the present.