
Casey
- County:
- Clark County
- County Seat:
- No
- Area (mi²):
- 2.622
- State:
- Illinois
Casey is a city located in Clark County, Illinois. Casey has a 2025 population of 2,313. Casey is currently declining at a rate of -0.77% annually and its population has decreased by -3.83% since the most recent census, which recorded a population of 2,405 in 2020.
The average household income in Casey is $60,672 with a poverty rate of 16.51%. The median age in Casey is 46 years: 42.4 years for males, and 48.6 years for females.