
Eldorado
- County:
- Saline County
- County Seat:
- No
- Area (mi²):
- 2.503
- State:
- Illinois
Eldorado is a city located in Saline County, Illinois. Eldorado has a 2025 population of 3,521. Eldorado is currently declining at a rate of -1.21% annually and its population has decreased by -5.73% since the most recent census, which recorded a population of 3,735 in 2020.
The average household income in Eldorado is $78,528 with a poverty rate of 20.94%. The median age in Eldorado is 45.8 years: 42.1 years for males, and 53.2 years for females.