
Mount Sterling
- County:
- Brown County
- County Seat:
- Yes
- Area (mi²):
- 1.108
- State:
- Illinois
Mount Sterling is a city located in Brown County, Illinois. Mount Sterling has a 2025 population of 2,034. It is also the county seat of Brown County. Mount Sterling is currently growing at a rate of 0.44% annually and its population has increased by 2.26% since the most recent census, which recorded a population of 1,989 in 2020.
The average household income in Mount Sterling is $77,757 with a poverty rate of 11.91%. The median age in Mount Sterling is 36.7 years: 34.3 years for males, and 38.3 years for females.