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
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
Edward Pulsifer Houselisted 1979
Putnam County Courthouselisted 1975
Population over time
2 figuresHennepin 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.
| Year | People | Change |
|---|---|---|
| 2010 | 757 | |
| 2020 | 769 | +12 (+2%) |
Topographic sheets covering this place
7 surveys from 13 printed sheetsMatched 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.
- 1893 USGS Hennepin quadrangle1:62500, 2 printings
- 1909 USGS Hennepin quadrangle1:62500
- 1911 USGS Hennepin quadrangle1:62500, 2 printings
- 1958 USGS Aurora quadrangle1:250000, 3 printings
- 1961 USGS Aurora quadrangle1:250000
- 1966 USGS Depue quadrangle1:24000, 2 printings
- 1985 USGS Kewanee quadrangle1:100000, 2 printings
Fires near this place
1 since 2014Regional 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 burning | 1 |
The most recent of them, most recent first, with the day each was reported and the service that recorded it.
| Date | Cause | Size | Reported by | Name on the report |
|---|---|---|---|---|
| 30 March 2014 | Debris and open burning | under an acre | Illinois Division of Forestry Resources | STAND6 |
Settlements close enough to share some of these fires:
Mines and quarries near this place
7 within 5 milesRegional 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 | Site | Commodity | Status | Recorded |
|---|---|---|---|---|
| Bureau Rawson Plant #6 | Sand and Gravel, Construction | Producer | ||
| Crowder Pit | Sand and Gravel, Construction | Past Producer | ||
| Embs Pit | Sand and Gravel, Construction | Past Producer | ||
| Gedraitis Pit | Sand and Gravel, Construction | Past Producer | ||
| Hennepin Pit | Sand and Gravel, Construction | Producer | ||
| Morine Pit | Sand and Gravel, Construction | Past Producer | ||
| Newbaum Pit | Sand and Gravel, Construction | Past Producer |
Storms near this place
28 since 2000Regional 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.
| When | Event | Place named | Harm | What the report says |
|---|---|---|---|---|
| July 2008 | Flash Flood | Hennepin | $50,000 | Torrential rains eroded several roads south and west of McNabb, IL and in the vicinity of Florid, IL during the morning of July 12. |
| July 2006 | Thunderstorm Wind | Hennepin | $5,000 | Tree down on car. Time estimated based on radar. |
| June 2005 | Thunderstorm Wind | Hennepin | $2,000 | A few trees down in Hennepin. South of town several 12 to 16 inch diameter trees (mainly rotted) were also downed. |
| April 2026 | Thunderstorm Wind | Hennepin | - | Public measured wind equipement. |
| April 2026 | Thunderstorm Wind | Hennepin | - | Garage door blown in on a home, with multiple 3 inch diameter tree branched down. Time estimated from radar data. |
| April 2026 | Thunderstorm Wind | Hennepin | - | Multiple small trees up to 8 inches in diameter snapped at base or uprooted. Time estimated from radar data. |
| April 2026 | Thunderstorm Wind | Hennepin | - | Measured winds of 58 mph. |
| March 2025 | Thunderstorm Wind | Hennepin | - | Numerous trees blown down, blocking roads south of Hennepin. |
| March 2025 | Thunderstorm Wind | Hennepin | - | Several power poles were snapped off between Hennepin and Mark. 1400 power customers are without power. |
| May 2024 | Thunderstorm Wind | Hennepin | - | An 8 inch diameter tree limb down. The time was estimated from radar data. |
| July 2023 | Thunderstorm Wind | Hennepin | - | Eight inch diameter tree snapped near the sheriff's office, with branches downed around town. |
| August 2022 | Thunderstorm Wind | Hennepin | - | The COOP Observer reported a large tree knocked down in their yard. The time of the event was estimated using radar. |
| July 2022 | Thunderstorm Wind | Hennepin | - | 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 2020 | Thunderstorm Wind | Hennepin | - | 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 2017 | Thunderstorm Wind | Hennepin | - | The top of a large cedar tree was reported down in a yard. |
| March 2017 | Thunderstorm Wind | Hennepin | - | Numerous trees were down on State Route 26 across the county. Time was estimated by radar. |
| July 2015 | Thunderstorm Wind | Hennepin | - | 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 2015 | Hail | Hennepin | - | Emergency management reported quarter size hail. |
| June 2015 | Hail | Hennepin | - | Quarter size hail was reported through social media by public. |
| June 2015 | Hail | Hennepin | - | Quarter size hail fell for 15 continuous minutes. |
| June 2015 | Flash Flood | Hennepin | - | Law Enforcement reported water over both lanes of Highway 26. |
| June 2015 | Hail | Hennepin | - | Law enforcement reported quarter size hail and heavy rain. |
| June 2013 | Thunderstorm Wind | Hennepin | - | Several tree branches that were 1 to 2 inches in diameter were reported down. |
| March 2007 | Thunderstorm Wind | Hennepin | - | Sheriffs department reported several power lines down along with some smaller branches in the Hennepin area. |
| April 2000 | Hail | Hennepin | - | Pea-sized hail reported by trained spotter. |
| June 2020 | Hail | Hennepin | - | no account filed |
| June 2015 | Hail | Hennepin | - | no account filed |
| May 2000 | Thunderstorm Wind | Hennepin | - | no account filed |
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 | Place | Distance | Sheets |
|---|---|---|---|
| Moronts | 3.4 miles | 13 | |
| Florid | 3.7 miles | 17 | |
| Undercliff | 4.8 miles | 17 | |
| Mark | 4.9 miles | 13 | |
| Indian Spring | 5.1 miles | 17 | |
| Walnut Grove | 5.4 miles | 17 | |
| Putnam | 5.6 miles | 17 | |
| Granville | 6.1 miles | 19 |
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 Hennepin | An encyclopaedic summary. Its text is share-alike, so it is linked here rather than copied. |
| Wikidata item Q2188478 | The 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.






