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Eldorado, Illinois

17 topographic sheets cover this place, the earliest surveyed in 1905 and the latest in 1987. It stands in East Eldorado Township. It lies in ZIP code area 62930. The Survey maps it on the Eldorado quadrangle. 3,743 people lived here at the 2020 count. It stands 390 feet above sea level.

Eldorado within Saline County

On record in Eldorado

Buildings and businesses the archive holds for this place. Each opens its own page, with the source record it came from.

On the National Register 1 record

Population over time

2 figures

Eldorado fell from 4,122 to 3,743 between 2010 and 2020. These are the recorded population figures Wikidata holds for this place, reached through the Geographic Names Information System number this page is keyed on rather than by name, so they belong to this place and not to another of the same name. Most are census counts, but not all are: an early figure may be a founding or settlement estimate, and an estimate published within five years of a census is left out. The change column is computed, and is left blank where more than 20 years separate a figure from the one before it, because a gap that long is not a change between two counts.

YearPeople Change
20104,122
20203,743-379 (-9%)

Topographic sheets covering this place

12 surveys from 17 printed sheets

Matched by testing this settlement's coordinate against the published boundary of every sheet in the United States Geological Survey's historical collection. Each opens the scanned sheet at the Survey.

Storms near this place

23 since 1996

Regional context, not property-specific evidence. The National Weather Service names Eldorado in 23 storm reports between 1996 and 2025: 10 thunderstorm wind, 6 hail, 3 flash flood, 2 funnel cloud. No death or injury is recorded in these reports. Each account below is quoted exactly as the forecast office filed it, from the NOAA Storm Events Database, and each date opens the federal record of that event.

WhenEvent Place namedHarm What the report says
January 2008Thunderstorm WindEldorado$200,000Damage was reported between Raleigh and Eldorado. Two mobile homes were destroyed. The steeple of a church was blown off in Eldorado. A large tree fell onto a car. An outbuilding was destroyed, and a large tree fell on the corner of a house. Several houses lost pieces of roofing. A carport was lifted and blown onto a van. An oil-filled tank overturned and spilled oil. About 30 homes and businesses reported roof damage across the county, and another 30 were suspected of not reporting or not detecting damage. Downed trees and power lines were reported along Hilltop Road and U.S. 45. Widespread tree damage occurred throughout the county.
May 2011Thunderstorm WindEldorado$100,000A 100-year-old oak tree was uprooted, taking power and phone lines down. The tree roots damaged a water main, causing water levels in the town's water tower to drop sharply. Numerous streets were blocked by downed trees and limbs around town. Four power poles were broken by downed trees. In downtown Eldorado, hundreds of roofing shingles littered the streets.
May 2011Thunderstorm WindEldorado$50,000At least five large trees were blown down. One house was damaged by a large tree that fell on it. Tree limbs fell on streets and other city property.
July 2002Thunderstorm WindEldorado$25,000Numerous trees and power lines were blown down. Minor roof damage occurred to some homes. The roof was blown off a metal structure.
May 2020Thunderstorm WindEldorado$5,000One tree fell on a power line and knocked out power near the city limits of Eldorado.
August 2005Flash FloodEldorado$5,000Flooding was reported on almost every street in town. In downtown Eldorado, floodwaters were two to three feet deep in places. Floodwaters entered at least one business, but no major damage was reported. Rainfall was estimated around one inch within 30 minutes.
August 2000Thunderstorm WindEldorado$5,000Tree limbs fell on power lines.
July 2012Thunderstorm WindEldorado$3,000Power lines were blown down.
February 2025HailEldorado-A report of hail up to 0.75 in diameter was reported via MPING.
March 2023Flash FloodEldorado-Water was over roads in town.
August 2019HailEldorado-Intermittent quarter-size hail fell near Eldorado Reservoir.
April 2018HailEldorado-Heavy pea to penny-size hail was reported.
April 2010Heavy RainEldorado-Standing water was over State Route 142 at a couple of locations just south of Eldorado. There was a major vehicle accident at one of the locations. Several roadways in eastern Saline County were under water.
July 2009Heavy RainEldorado-Water was over two main roads, including Highway 142.
May 2006Thunderstorm WindEldorado-Trees and large limbs were down in several residents' yards.
July 2006Thunderstorm WindEldorado-A trained spotter estimated wind gusts to 60 MPH at the intersection of U.S. Highway 45 and Route 142. Several tree limbs were blown down, including at least one very large one.
April 2014HailEldorado-no account filed
May 2006HailEldorado-no account filed
April 2005HailEldorado-no account filed
April 2005Funnel CloudEldorado-no account filed
May 2004Flash FloodEldorado-no account filed
June 2004Funnel CloudEldorado-no account filed
July 1996Thunderstorm WindEldorado-no account filed

Every storm recorded in Saline County

Nearest settlements

The eight closest, with where each one stands in the county. Distances are straight-line, computed from the Geographic Names Information System coordinates.

Map PlaceDistance Sheets
Saline City0.7 miles17
Beulah Heights0.9 miles17
Wasson3.0 miles17
Red Bud (historical)3.1 miles17
Cottage Grove4.8 miles22
Texas City5.1 miles17
Raleigh5.1 miles19
Muddy5.3 miles19

Elsewhere

Matched on this settlement's Geographic Names Information System number rather than its name, so it cannot be a different place of the same name in another state.

Wikipedia article on EldoradoAn encyclopaedic summary. Its text is share-alike, so it is linked here rather than copied.
Wikidata item Q575401The structured record the population and elevation above come from. Public domain (CC0).

Provenance

This settlement is recorded in the Geographic Names Information System as feature 407845. The sheet list is computed by point-in-boundary test against the United States Geological Survey's historical topographic inventory. Both are works of the United States government and carry no copyright under 17 U.S.C. 105.

Storms. NOAA National Centers for Environmental Information, Storm Events Database https://www.ncei.noaa.gov/stormevents/ A work of the United States government, no copyright under 17 U.S.C. 105. Narratives are quoted verbatim from the National Weather Service report and are not edited or summarised.