
Mount Carroll
- County:
- Carroll County
- County Seat:
- Yes
- Area (mi²):
- 2.003
- State:
- Illinois
Mount Carroll is a city located in Carroll County, Illinois. Mount Carroll has a 2025 population of 1,418. It is also the county seat of Carroll County. Mount Carroll is currently declining at a rate of -0.77% annually and its population has decreased by -3.86% since the most recent census, which recorded a population of 1,475 in 2020.
The average household income in Mount Carroll is $73,592 with a poverty rate of 10.4%. The median age in Mount Carroll is 44.6 years: 44.9 years for males, and 44.5 years for females.