Mount Carroll is a city in and the county seat of Carroll County, Illinois, United States. The population was 1,479 at the 2020 census.
Mount Carroll Historic District
Carroll County Courthouse
Metcalf Hall Shimer Campus-Campbell Center
Downtown Market Street
Carroll County is a county located in the U.S. state of Illinois. As of the 2020 census, the population was 15,702. Its county seat is Mount Carroll.
Carroll County Courthouse