Hennepin, Illinois

2025-07-28T04:24:38Z

2600:1700:4640:D20:9E9:8A19:804C:63D3:

{{Short description|Town in Illinois, United States}}
{{Use mdy dates|date=May 2024}}
{{Infobox settlement
| name = Hennepin
| motto =
| settlement_type = [[List of municipalities in Illinois|Village]]
| image_skyline = Putnam County Courthouse, Hennepin.jpg
| imagesize = 250px
| image_caption = The [[Putnam County Courthouse (Illinois)|Putnam County Courthouse]]
| image_map = File:Putnam County Illinois Incorporated and Unincorporated areas Hennepin Highlighted.svg
| mapsize = 250
| map_caption = Location of Hennepin in Putnam County, Illinois.

| subdivision_type = [[List of sovereign states|Country]]
| subdivision_name = United States
| subdivision_type1 = [[U.S. state|State]]
| subdivision_name1 = [[Illinois]]
| subdivision_type2 = [[List of counties in Illinois|County]]
| subdivision_name2 = [[Putnam County, Illinois|Putnam]]
| subdivision_type3 = [[List of townships in Illinois|Township]]
| subdivision_name3 = [[Hennepin Township, Putnam County, Illinois|Hennepin]]

| government_type =
| leader_title = Mayor
| established_title = Established
| established_date =
| established_title2 = [[Municipal corporation|Incorporated]]
| established_date2 = February 13, 1837

| unit_pref = Imperial
| area_footnotes = <ref name="CenPopGazetteer2020">{{cite web|title=2020 U.S. Gazetteer Files|url=https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2020_Gazetteer/2020_gaz_place_17.txt|publisher=United States Census Bureau|accessdate=March 15, 2022}}</ref>
| area_total_sq_mi = 5.66
| area_land_sq_mi = 5.31
| area_water_sq_mi = 0.35
| area_total_km2 = 14.66
| area_land_km2 = 13.74
| area_water_km2 = 0.92

| population_as_of = [[2020 United States census|2020]]
| population_footnotes =
| population_total = 769
| population_density_km2 = 55.95
| population_density_sq_mi = 144.90
| population_demonym =

| timezone = [[North American Central Time Zone|CST]]
| utc_offset = -6
| timezone_DST = [[North American Central Time Zone|CDT]]
| utc_offset_DST = -5
| elevation_footnotes = <ref name=gnis/>
| elevation_ft = 528
| coordinates_footnotes = <ref name=gnis/>
| coordinates = {{coord|41|14|53|N|89|19|30|W|display=inline,title}}

| postal_code_type = ZIP codes
| postal_code = 61327
| blank_name = [[Federal Information Processing Standards|FIPS code]]
| blank_info = 17-34098
| blank1_name = [[Geographic Names Information System|GNIS]] feature ID
| blank1_info = 2398489<ref name=gnis>{{GNIS|2398489}}</ref>
| website = http://www.villageofhennepin.com
| footnotes =
}}

'''Hennepin''' is a village located on the [[Illinois River]] in [[Putnam County, Illinois]], [[United States]]. The population was 757 in 2010, an increase of 50 since the 2000 census. It is the [[county seat]] of and the second largest village in [[Putnam County, Illinois|Putnam County]].<ref name="GR6">{{cite web|url=http://www.naco.org/Counties/Pages/FindACounty.aspx |access-date=June 7, 2011 |title=Find a County |publisher=National Association of Counties |url-status=dead |archive-url=https://web.archive.org/web/20110531210815/http://www.naco.org/Counties/Pages/FindACounty.aspx |archive-date=May 31, 2011 }}</ref>

Hennepin is part of the [[Ottawa, Illinois|Ottawa]] [[Ottawa, IL Micropolitan Statistical Area|Micropolitan Statistical Area]].

==History==
The Village of Hennepin was named for the explorer, [[Louis Hennepin]].<ref>{{cite book | url=https://archive.org/details/bub_gb_9V1IAAAAMAAJ | title=The Origin of Certain Place Names in the United States | publisher=Govt. Print. Off. | author=Gannett, Henry | year=1905 | pages=[https://archive.org/details/bub_gb_9V1IAAAAMAAJ/page/n154 155]}}</ref>

The [[Putnam County Courthouse (Illinois)|Putnam County Courthouse]], in Hennepin, was built in 1837, and is the oldest county courthouse in [[Illinois]] still serving its original purpose.<ref>{{Cite web|url=http://illinois.outfitters.com/illinois/putnam/|title=Putnam County, Illinois, USA|website=illinois.outfitters.com}}</ref> [[Abraham Lincoln]] visited the courthouse, including when he campaigned for a [[Congressional|Congressional seat]] in September 1845. The [[Putnam County Courthouse (Illinois)|Putnam County Courthouse]] is listed on the [[National Register of Historic Places]].

==Geography==

===Climate===
{{Weather box 
| single line = Y
| collapsed = Y
| location = Hennepin, Illinois (1991–2020)

| Jan high F =32.3
| Feb high F =37.1
| Mar high F =50.1
| Apr high F =63.5
| May high F =73.7
| Jun high F =81.7
| Jul high F =84.5
| Aug high F =82.9
| Sep high F =77.1
| Oct high F =65.2
| Nov high F =49.9
| Dec high F =36.7

| Jan mean F =24.6
| Feb mean F =28.6
| Mar mean F =40.1
| Apr mean F =52.0
| May mean F =62.5
| Jun mean F =71.6
| Jul mean F =74.5
| Aug mean F =72.7
| Sep mean F =65.8
| Oct mean F =54.1
| Nov mean F =41.1
| Dec mean F =29.3

| Jan low F =16.8
| Feb low F =20.1
| Mar low F =30.1
| Apr low F =40.5
| May low F =51.3
| Jun low F =61.4
| Jul low F =64.5
| Aug low F =62.4
| Sep low F =54.5
| Oct low F =43.0
| Nov low F =32.3
| Dec low F =21.8

| precipitation colour = green
| Jan precipitation inch =1.95
| Feb precipitation inch =1.80
| Mar precipitation inch =2.46
| Apr precipitation inch =3.85
| May precipitation inch =4.76
| Jun precipitation inch =4.55
| Jul precipitation inch =3.89
| Aug precipitation inch =3.77
| Sep precipitation inch =3.45
| Oct precipitation inch =3.31
| Nov precipitation inch =2.60
| Dec precipitation inch =2.19

| source = NOAA<ref>{{cite web |url=https://www.ncei.noaa.gov/access/us-climate-normals/#dataset=normals-monthly&timeframe=30&station=USC00114012 |title=NOAA NCEI U.S. Climate Normals Quick Access |publisher=NOAA |access-date=April 17, 2024 }}</ref>
}}

==Demographics==
{{US Census population
|1880= 623
|1890= 574
|1900= 523
|1910= 451
|1920= 377
|1930= 312
|1940= 396
|1950= 312
|1960= 391
|1970= 535
|1980= 716
|1990= 669
|2000= 707
|2010= 757
|2020= 769
|footnote=U.S. Decennial Census<ref name="DecennialCensus">{{cite web|url=https://www.census.gov/programs-surveys/decennial-census.html|title=Census of Population and Housing|publisher=Census.gov|access-date=June 4, 2015}}</ref>
}}
As of the [[census]]<ref name="GR2">{{cite web|url=https://www.census.gov|publisher=[[United States Census Bureau]]|access-date=January 31, 2008|title=U.S. Census website}}</ref> of 2000, there were 707 people, 304 households, and 206 families residing in the village. The population density was {{convert|135.4|PD/sqmi|PD/km2|sp=us|adj=off}}. There were 334 housing units at an average density of {{convert|64.0|/sqmi|/km2|abbr=out}}. The racial makeup of the village was 97.17% [[White Americans|White]], 1.13% [[African American#U.S. Census#|African American]], 0.28% [[Indigenous peoples of the Americas|Native American]], 0.71% [[Asian people|Asian]], 0.57% from [[Race (human classification)|other races]], and 0.14% from two or more races. [[Hispanic]] or [[Hispanic and Latino Americans|Latino]] of any race were 3.82% of the population.

There were 304 households, out of which 26.6% had children under the age of 18 living with them, 59.2% were [[Marriage|married couples]] living together, 5.6% had a female householder with no husband present, and 32.2% were non-families. 30.3% of all households were made up of individuals, and 16.1% had someone living alone who was 65 years of age or older. The average household size was 2.32 and the average family size was 2.87.

In the village, the population was spread out, with 20.8% under the age of 18, 9.2% from 18 to 24, 24.6% from 25 to 44, 27.0% from 45 to 64, and 18.4% who were 65 years of age or older. The median age was 42 years. For every 100 females, there were 96.4 males. For every 100 females age 18 and over, there were 92.4 males.

The median income for a household in the village was $46,827, and the median income for a family was $56,111. Males had a median income of $48,500 versus $19,231 for females. The [[per capita income]] for the village was $23,981. About 2.6% of families and 2.9% of the population were below the [[poverty line]], including 5.6% of those under age 18 and 2.9% of those age 65 or over.

==Industry==
{{unsourced|section|date=July 2025}}
Hennepin's location on the [[Illinois River]], along with its proximity to a [[Class I rail carrier|Class I railroad]] ([[Norfolk Southern Railway]]), and multiple inter and intrastate highway routes ([[Interstate 80 in Illinois|Interstate 80]], [[Interstate 39]], [[Illinois Route 6|Illinois Route 180]], [[Illinois Route 81|Illinois Route 89]], [[Illinois Route 71]], [[Illinois Route 26]], and [[Illinois Route 6]]) has, historically, made it a transportation hub attracting a variety of both small businesses and large industries.

J&L Steel, a cold roll steel mill built by [[Jones and Laughlin Steel Company]] on Hennepin's northern boundary, began operations in 1967 and employed 600 workers at height of production. The mill was later acquired by [[Ling-Temco-Vought]], at which time it became known as LTV Steel. [[Ling-Temco-Vought|Ling-Temco-Vought's]] bankruptcy led to acquisition of the mill by [[International Steel Group]] (ISG). As a result of additional acquisitions followed by a merger, [[Putnam County, Illinois|Putnam County's]] largest employer was absorbed by [[ArcelorMittal]]. Long and arduous union lobbying and protests ultimately proved futile and [[ArcelorMittal]] ceased production at the mill in March 2009. The mill's equipment was dismantled, sold, or shipped and on June 22, 2017, the vast plant was imploded. As of 2020, the 800 acres once occupied by the steel mill remain mostly vacant, though infrastructure has been retained in anticipation that another industry might one day purchase and redevelop the property.

Hennepin Power Station, a coal-fired power plant near [[Donnelley/Depue State Park|Donnelley Wildlife Area]] on the western edge of town, was retired November 1, 2019.

There are also [[Cargill]], [[Archer Daniels Midland|ADM]], and CGB elevators throughout the area.

Marquis Energy opened a 100 million gallon/year ICM/Fagen [[ethanol]] plant just north of town in April 2008.

==Landmarks==
[[Edward Pulsifer House]], museum and headquarters of the Putnam County Historical Society

Putnam County Historical Society's Agriculture Museum

[[Putnam County Courthouse (Illinois)]]

The [[Dixon Waterfowl Refuge]], a privately maintained wetland, is located two miles south of Hennepin.

==Education==
It is in the [[Putnam County Community Unit School District 535]].<ref name=PutnamCoSDMap2020>{{cite map|author=Geography Division|url=https://www2.census.gov/geo/maps/DC2020/PL20/st17_il/schooldistrict_maps/c17155_putnam/DC20SD_C17155.pdf|title=2020 CENSUS - SCHOOL DISTRICT REFERENCE MAP: Putnam County, IL|publisher=[[U.S. Census Bureau]]|date=December 22, 2020|access-date=2025-06-17}} - [https://www2.census.gov/geo/maps/DC2020/PL20/st17_il/schooldistrict_maps/c17155_putnam/DC20SD_C17155_SD2MS.txt Text list]</ref>

==Notable people==


* [[Albert W. Durley]], Wisconsin State Assemblyman and lawyer; was born near Hennepin.<ref>'Wisconsin Blue Book 1907,' Biographical Sketch of Albert W. Durley. pg. 1147</ref>
* [[John Wesley Powell]], Civil War veteran, geologist, teacher and superintendent of Hennepin schools.<ref>{{cite web| url = http://www.nps.gov/history/history/online_books/geology/publications/inf/74-24/sec1.htm| url-status = dead| archive-url = https://web.archive.org/web/20070716184205/http://www.nps.gov/history/history/online_books/geology/publications/inf/74-24/sec1.htm| archive-date = July 16, 2007| title = USGS: John Wesley Powell: Soldier, Explorer, Scientist}}</ref>

==References==
<references />
{{commons category}}

{{Putnam County, Illinois}}
{{Illinois}}
{{Illinois county seats}}

{{authority control}}

[[Category:Villages in Putnam County, Illinois]]
[[Category:County seats in Illinois]]
[[Category:Ottawa, IL Micropolitan Statistical Area]]
[[Category:Populated places established in 1837]]
[[Category:Villages in Illinois]]

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Hennepin, Illinois