Eldorado is a city located in Saline County, in the state of Illinois (IL), United States. Nestled in the East North Central division of the Midwest region, it covers an area of 2.3 square miles (6.0 km²) and sits at an elevation of 389 ft. With a population of approximately 4,534 residents, Eldorado offers a peaceful, rural atmosphere.
The town's population is composed of about 45.85% males and 54.15% females, and it has a population density of 971.30 people per square mile (761.12/km²). Eldorado lies at a latitude of 37.81 and a longitude of -88.44, operating in the UTC-6.
Locals reflect a blend of American ancestry, with roots primarily in United States (13.7%), followed by English (8.6%), German (13.4%), and Scotch-Irish (3%) heritage. The town is identified by the ZIP code 62930.