
Shelbyville
- County:
- Shelby County
- County Seat:
- Yes
- Area (mi²):
- 4.085
- State:
- Illinois
Shelbyville is a city located in Shelby County, Illinois. Shelbyville has a 2025 population of 4,498. It is also the county seat of Shelby County. Shelbyville is currently declining at a rate of -0.68% annually and its population has decreased by -3.33% since the most recent census, which recorded a population of 4,653 in 2020.
The average household income in Shelbyville is $64,500 with a poverty rate of 14.22%. The median age in Shelbyville is 45 years: 42.7 years for males, and 49.3 years for females.