
Joy
- County:
- Mercer County
- County Seat:
- No
- Area (mi²):
- 0.428
- State:
- Illinois
Joy is a village located in Mercer County, Illinois. Joy has a 2025 population of 360. Joy is currently declining at a rate of -0.55% annually and its population has decreased by -2.7% since the most recent census, which recorded a population of 370 in 2020.
The average household income in Joy is $67,836 with a poverty rate of 15.55%. The median age in Joy is 37.6 years: 38.2 years for males, and 37.4 years for females.