Dewey
- County:
- Champaign County
- County Seat:
- No
- Area (mi²):
- 0.097
- State:
- Illinois
Dewey is a CDP located in Champaign County, Illinois. Dewey has a 2025 population of 159 . Dewey is currently growing at a rate of 7.43% annually and its population has increased by 76.67% since the most recent census, which recorded a population of 90 in 2020.
The median age in Dewey is 40.3 years: 0 years for males, and 40.2 years for females. For every 100 females there are 12.7 males.