BlockBefore

Lemont, Illinois

24 topographic sheets cover this place, the earliest surveyed in 1892 and the latest in 1998. It stands in Lemont Township. It lies in ZIP code area 60439. It stands on Canyon Creek. The Survey maps it on the Romeoville quadrangle. 17,629 people lived here at the 2020 count. It stands 607 feet above sea level.

Lemont within Cook County

On record in Lemont

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 4 records

Population over time

2 figures

Lemont grew from 16,000 to 17,629 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
201016,000
202017,629+1,629 (+10%)

Topographic sheets covering this place

10 surveys from 24 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.

Fires near this place

6 since 2020

Regional context, not property-specific evidence. The federal wildfire occurrence database lists 6 fires within 5 miles of Lemont in 2020, burning about 4 acres in total. None started naturally. None was recorded as arson. Distance is straight-line from the map coordinates, so a fire counted here may appear on a neighbouring settlement's page as well.

Reported cause Fires
Missing data/not specified/undetermined3
Debris and open burning2
Equipment and vehicle use1

The most recent of them, most recent first, with the day each was reported and the service that recorded it.

DateCause SizeReported by Name on the report
1 September 2020Debris and open burningunder an acreIllinois Division of Forestry Resources20-0002215
5 May 2020Missing data/not specified/undeterminedunder an acreIllinois Division of Forestry Resources20-0000919
5 May 2020Missing data/not specified/undeterminedunder an acreIllinois Division of Forestry Resources20-0000918
13 April 2020Debris and open burning1.0 acresIllinois Division of Forestry Resources20-0000723
9 November 2020Equipment and vehicle useunder an acreIllinois Division of Forestry Resources20-0002593
1 October 2020Missing data/not specified/undetermined1.0 acresIllinois Division of Forestry Resources20-0002295

Settlements close enough to share some of these fires:

Every fire recorded in Cook County

Mines and quarries near this place

8 within 5 miles

Regional context, not property-specific evidence. The federal mineral resources record lists 8 workings within 5 miles of Lemont: 5 past producers, 1 plant, 1 producer, 1 occurrence. 2 still produce. What was taken out: Stone, Crushed/Broken, Sand and Gravel, Construction, Sulfur. Distance is straight-line from the map coordinates, so a quarry counted here may appear on a neighbouring settlement's page as well.

Where SiteCommodity StatusRecorded
(Facility) Union 76 Chicago RefinerySulfurPlant
Lemont PitSand and Gravel, ConstructionPast Producer
Yackley PitSand and Gravel, ConstructionPast Producer
Barge Slip QuarryStone, Crushed/BrokenPast Producer
Lemont Quarry & Mill Yard 360Stone, Crushed/BrokenProducer
Lemont Quarry Consumers CompanyStone, Crushed/BrokenPast Producer
Limestone ProspectStone, Crushed/BrokenOccurrence
Unnamed Limestone QuarryStone, Crushed/BrokenPast Producer

Every working recorded in Cook County

Storms near this place

30 since 1997

Regional context, not property-specific evidence. The National Weather Service names Lemont in 30 storm reports between 1997 and 2025: 15 hail, 11 thunderstorm wind, 2 flash flood, 1 tornado. 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
August 2010Flash FloodLemont$500,000Several roads were closed due to flooding across southern Cook County. In Chicago Heights, 202nd Street was flooded and closed from Wood Street to Ashland Avenue. Tinley Park reported 19 locations with high standing water in the streets. In Midlothian, a church suffered flooding on the first floor; several streets were flooded and standing water in some areas was estimated to be 4 feet deep. Basement flooding was also reported in some areas. Storm total rainfall amounts included 4.10 inches in Oak Forest, 2.50 inches four miles southeast of Matteson and 1.44 inches five miles east southeast of Chicago Heights.
June 2011Thunderstorm WindLemont$1,000Five trees were blown down across parts of Bluff Road. Other tree limbs and power lines were blown down.
June 2025Thunderstorm WindLemont-A power pole was snapped along 127th St west of Archer Ave in Lemont.
July 2025Thunderstorm WindLemont-The top half of a 2 to 3 foot diameter tree was snapped off, which fell on power lines and blocked a road near Kettering Lane and Warner Avenue.
March 2023Thunderstorm WindLemont-A 61 mph gust was measured at the Lemont Emergency Operations Center.
March 2023Thunderstorm WindLemont-A semi truck was blown over on I-355 as it crossed the Des Plaines River north of Lemont. Wind magnitude and time were estimated based on radar.
July 2023Heavy RainLemont-A private weather station, KILLOCKP56 , recorded over 2 inches of rainfall in a 30 minute period.
August 2021Thunderstorm WindLemont-Wind gusts were estimated to at least 60 mph.
September 2019Flash FloodLemont-Flash flooding occurred in many areas in southern Cook County. Volmer Road was flooded and closed between Kedzie and Western near Olympia Fields. Cars were submerged in a Metra Station parking lot near Flossmoor. All lanes of Interstate 57 were flooded in an underpass near Matteson. Storm total rainfall amounts included 6.75 inches in Park Forest; 6.73 inches one mile southwest of Country Club Hills; 6.36 inches one mile east southeast of Flossmoor; 5.91 inches in Flossmoor; 5.65 inches one mile north northeast of Park Forest; 4.72 inches in Lansing and 4.63 inches in Homewood.
May 2017Thunderstorm WindLemont-A large section of a tree was blown down.
October 2013HailLemont-Nickel size hail was reported at Lemont and Main Street.
October 2006HailLemont-Nickel size hail reported along 127th street at New Avenue and at State Street.
March 2005HailLemont-Golf ball sized hail was reported in Lemont, 1922-1927 CST.Penny sized hail was reported in La Grange, 1932-1937 CST.Quarter sized hail was reported in La Grange, 1934-1937 CST.
March 2005HailLemont-Quarter sized hail was reported in Lemont, 1725-1730 CST.Quarter sized hail was reported in Chicago Ridge near the intersection of 95th St. and I-294, 1730-1735 CST.Penny sized hail was reported in Bridgeview at the intersection of 79th St. and 78th Ave, 1738-1743 CST.Nickel sized hail was reported in Hometown, 1740-1745 CST.Penny sized hail was reported in La Grange, 1740-1745 CST.Penny sized hail was reported in Bridgeview, 1755-1800 CST.
July 2004Thunderstorm WindLemont-Trees were knocked down on Main St. between Cortland Rd. and Rt. 83.
May 2003Tornado (F0)Lemont-A weak tornado touched down near Route 83 and Archer Roads in the Forest Preserve. No damage was reported.
March 2025HailLemont-no account filed
February 2024HailLemont-no account filed
June 2019HailLemont-no account filed
June 2019HailLemont-no account filed
June 2019HailLemont-no account filed
May 2018HailLemont-no account filed
April 2015HailLemont-no account filed
July 2007HailLemont-no account filed
June 2004HailLemont-no account filed
May 2003HailLemont-no account filed
July 2003Thunderstorm WindLemont-no account filed
June 1999HailLemont-no account filed
July 1997Thunderstorm WindLemont-no account filed
August 1997Thunderstorm WindLemont-no account filed

Every storm recorded in Cook 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
Emerald Acres1.4 miles24
Hastings1.7 miles26
Cache Lake2.1 miles24
Maple Leaf Estates2.1 miles26
Big Run Acres2.2 miles24
Creekwood2.4 miles26
Sylvan Woods2.8 miles26
Fox Hills3.0 miles26

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 LemontAn encyclopaedic summary. Its text is share-alike, so it is linked here rather than copied.
Wikidata item Q1589523The 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 411943. 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.

Wildfire. Short, Karen C. 2022. Spatial wildfire occurrence data for the United States, 1992-2020 [FPA_FOD_20221014]. 6th Edition. Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2013-0009.6 Collected with United States Government funding and usable without additional permissions or fees.

Mines and quarries. USGS Mineral Resources Data System (MRDS) https://mrdata.usgs.gov/mrds/ A work of the United States government, 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.