
Coal Valley
- County:
- Rock Island County
- County Seat:
- No
- Area (mi²):
- 3.166
- State:
- Illinois
Coal Valley is a village located in Rock Island County, Illinois. Coal Valley has a 2025 population of 3,784. Coal Valley is currently declining at a rate of -0.42% annually and its population has decreased by -2.07% since the most recent census, which recorded a population of 3,864 in 2020.
The average household income in Coal Valley is $118,225 with a poverty rate of 2.73%. The median age in Coal Valley is 46.7 years: 45.6 years for males, and 49.9 years for females.