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Hennepin, Illinois

13 topographic sheets cover this place, the earliest surveyed in 1893 and the latest in 1985. It stands in Hennepin Township. It lies in ZIP code area 61327. It stands on Coffee Creek. The Survey maps it on the Depue quadrangle. 769 people lived here at the 2020 count. It stands 502 feet above sea level.

Research this city

Hennepin within Putnam County

On record in Hennepin

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 2 records

Population over time

2 figures

Hennepin grew from 757 to 769 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
2010757
2020769+12 (+2%)

Topographic sheets covering this place

7 surveys from 13 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

1 since 2014

Regional context, not property-specific evidence. The federal wildfire occurrence database lists 1 fire within 5 miles of Hennepin in 2014, burning under an acre 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
Debris and open burning1

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
30 March 2014Debris and open burningunder an acreIllinois Division of Forestry ResourcesSTAND6

Settlements close enough to share some of these fires:

Every fire recorded in Putnam County

Mines and quarries near this place

7 within 5 miles

Regional context, not property-specific evidence. The federal mineral resources record lists 7 workings within 5 miles of Hennepin: 5 past producers, 2 producers. 2 still produce. What was taken out: Sand and Gravel, Construction. 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
Bureau Rawson Plant #6Sand and Gravel, ConstructionProducer
Crowder PitSand and Gravel, ConstructionPast Producer
Embs PitSand and Gravel, ConstructionPast Producer
Gedraitis PitSand and Gravel, ConstructionPast Producer
Hennepin PitSand and Gravel, ConstructionProducer
Morine PitSand and Gravel, ConstructionPast Producer
Newbaum PitSand and Gravel, ConstructionPast Producer

Every working recorded in Putnam County

Storms near this place

28 since 2000

Regional context, not property-specific evidence. The National Weather Service names Hennepin in 28 storm reports between 2000 and 2026: 19 thunderstorm wind, 7 hail, 2 flash flood. 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
July 2008Flash FloodHennepin$50,000Torrential rains eroded several roads south and west of McNabb, IL and in the vicinity of Florid, IL during the morning of July 12.
July 2006Thunderstorm WindHennepin$5,000Tree down on car. Time estimated based on radar.
June 2005Thunderstorm WindHennepin$2,000A few trees down in Hennepin. South of town several 12 to 16 inch diameter trees (mainly rotted) were also downed.
April 2026Thunderstorm WindHennepin-Public measured wind equipement.
April 2026Thunderstorm WindHennepin-Garage door blown in on a home, with multiple 3 inch diameter tree branched down. Time estimated from radar data.
April 2026Thunderstorm WindHennepin-Multiple small trees up to 8 inches in diameter snapped at base or uprooted. Time estimated from radar data.
April 2026Thunderstorm WindHennepin-Measured winds of 58 mph.
March 2025Thunderstorm WindHennepin-Numerous trees blown down, blocking roads south of Hennepin.
March 2025Thunderstorm WindHennepin-Several power poles were snapped off between Hennepin and Mark. 1400 power customers are without power.
May 2024Thunderstorm WindHennepin-An 8 inch diameter tree limb down. The time was estimated from radar data.
July 2023Thunderstorm WindHennepin-Eight inch diameter tree snapped near the sheriff's office, with branches downed around town.
August 2022Thunderstorm WindHennepin-The COOP Observer reported a large tree knocked down in their yard. The time of the event was estimated using radar.
July 2022Thunderstorm WindHennepin-The COOP observer reported several tree limbs down, and power out for several hours. Also had a 2 inch diameter, 6 foot tall apple tree uprooted. The time of the event was estimated using radar.
June 2020Thunderstorm WindHennepin-The COOP Observer reported a tree down and several other large tree limbs down on the garage. A wind gauge over the garage door measured a peak gust of 60 MPH. They also reported golf ball sized hail.
March 2017Thunderstorm WindHennepin-The top of a large cedar tree was reported down in a yard.
March 2017Thunderstorm WindHennepin-Numerous trees were down on State Route 26 across the county. Time was estimated by radar.
July 2015Thunderstorm WindHennepin-Tree limbs up to the diameter of 3 inches were damaged. This was a delayed report with the time estimated by local radar data.
June 2015HailHennepin-Emergency management reported quarter size hail.
June 2015HailHennepin-Quarter size hail was reported through social media by public.
June 2015HailHennepin-Quarter size hail fell for 15 continuous minutes.
June 2015Flash FloodHennepin-Law Enforcement reported water over both lanes of Highway 26.
June 2015HailHennepin-Law enforcement reported quarter size hail and heavy rain.
June 2013Thunderstorm WindHennepin-Several tree branches that were 1 to 2 inches in diameter were reported down.
March 2007Thunderstorm WindHennepin-Sheriffs department reported several power lines down along with some smaller branches in the Hennepin area.
April 2000HailHennepin-Pea-sized hail reported by trained spotter.
June 2020HailHennepin-no account filed
June 2015HailHennepin-no account filed
May 2000Thunderstorm WindHennepin-no account filed

Every storm recorded in Putnam 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
Moronts3.4 miles13
Florid3.7 miles17
Undercliff4.8 miles17
Mark4.9 miles13
Indian Spring5.1 miles17
Walnut Grove5.4 miles17
Putnam5.6 miles17
Granville6.1 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 HennepinAn encyclopaedic summary. Its text is share-alike, so it is linked here rather than copied.
Wikidata item Q2188478The 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 410059. 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.