Eldorado is a city located in Saline County Illinois. With a 2020 population of 3,812, it is the 376th largest city in Illinois and the 5536th largest city in the United States . Eldorado is currently declining at a rate of -1.27% annually and its population has decreased by -7.52% since the most recent census, which recorded a population of 4,122 in 2010. Eldorado reached it's highest population of 5,198 in 1980. Spanning over 3 miles, Eldorado has a population density of 1,522 people per square mile.
The average household income in Eldorado is $48,243 with a poverty rate of 27.38%. The median rental costs in recent years comes to $642 per month, and the median house value is $44,000. The median age in Eldorado is 38.4 years, 33.6 years for males, and 47.7 years for females.