Hennepin, Illinois.
Typical home $222,114 (+12.5% in a year). Ottawa, IL metro.
to buy the typical home at today's mortgage rate — +$773 (+197%) since Jan 2020.
- 1 year
- Up $24,699 +13%
- $197,415$222,114 since Sep 2025
- 5 years
- Up $77,070 +53%
- $145,044$222,114 since Sep 2021
Monthly payment to buy the typical home
Home value × that month's 30-year mortgage rate, 20% down, principal and interest. This is the line households feel: prices and rates compound each other.
- Hennepin$1,166
- Illinois$1,553
- United States$1,922
At the last five years' pace, a typical home here doubles in price every 8 years.
Typical home values in Hennepin, IL rose 12.5% over the past year — faster than the nation's +1.2%.
Living in Hennepin, Putnam County, Illinois
Hennepin is a village of 769 people in Putnam County. Half its households earn more than $83,000 a year and half less, against $75,590 across Putnam County; 8% of its people live below the poverty line. 74% of its homes are lived in by their owners and 26% are rented. Unemployment in Putnam County was 3.9% in August 2026, and the county had 0.5% fewer jobs in 2025 than the year before. The most residents work in schools and health care, then manufacturing.
Written by AI Claude Sonnet 5.5 wrote this on 23 October 2026 from the figures here, a list of nearby places and what it knows. It can be wrong or out of date.
What it’s like
The place. Hennepin is a small village where most homes are lived in by their owners, and incomes run above the county's. Residents are around the middle of the age range, and a minority of adults have a four-year degree. Winters are cold, with January the coldest month, and summers are warm, with July the warmest; precipitation falls fairly evenly through the year as rain and melted snow.
Work. Residents work mostly in schools, hospitals and social care, with manufacturing, shops, and professional and business services also employing many. Across Putnam County, the largest workplaces include Mennie Machine, a precision turned product manufacturer, Marquis Energy, an ethanol producer, and Putnam County CUSD, the school district. Unemployment in the county is lower than a year ago, though the number of jobs has slipped slightly, and few residents work from home.
Things to do. The Dixon Waterfowl Refuge, a protected area, lies in or beside town. A short drive away are Big Bureau Creek, a river, and Senachwine Lake. Starved Rock State Park, a protected area, is a longer drive away.
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- 372households
- 21%of adults have a degree
- 8%below the poverty line
- 25 mintypical commute
- 7%work from home
What residents work in
Employed residents by industry, from the Census survey. Putnam County had 2,002 jobs in 2025, 0.5% fewer than the year before (Bureau of Labor Statistics).
Weather through the year
Coldest in January, with highs near 32° and lows near 17°; warmest in July, with highs near 84° and lows near 64°. About 39 inches of rain and melted snow a year.
Average daily high and low, 1991–2020, at the Hennepin weather station, a mile away (NOAA).
Largest workplaces in Putnam County
- Altman Specialty PlantsFlorist's supplies merchant wholesalers376
- Mennie MachinePrecision turned product manufacturing175
- Marquis EnergyEthanol, nonpotable, manufacturing163
- Putnam County CUSD 535School district131FTE
- MarquisTrucking, general freight, local111
- Washington Mills HennepinGrinding wheels manufacturing81
- Marquis Management ServicesCorporate offices67
- Marquis Extraction TechnologyDisinfectants, household-type and industrial, manufacturing56
Staff on average in 2025, as each workplace reported it to OSHA with its injury records: 8 workplaces with 20 or more staff, 1,060 people in all across the county; Hennepin has none of its own. School districts come from the Common Core of Data (NCES, 2023–24); FTE marks full-time equivalent staff. Not listed: many offices and banks, which need not report to OSHA; military bases, whose staff OPM withholds; and, in about half the states, city and county governments.
Natural hazards
- Strong windVery high
- TornadoesRelatively high
- Inland floodingRelatively high
- Cold wavesRelatively high
- DroughtRelatively moderate
- HailRelatively moderate
FEMA’s National Risk Index (December 2025) rates the risk each natural hazard poses to the people, buildings and farms in Hennepin’s census tracts, against the rest of the country; all of them together, relatively moderate. It is meant for planning, not a substitute for a local risk assessment or a flood map: FEMA’s index.
From the U.S. Census Bureau’s 2020 census and its American Community Survey (2020–2024 five-year estimates), and the Bureau of Labor Statistics. A survey, so each figure has a margin of error, and figures it is not sure of are left out. More on Putnam County and the Ottawa, IL metro.
Hennepin home values
Zillow measures a city over its municipal boundary. Against the state and national figures, mid-tier homes, smoothed and seasonally adjusted.
- Hennepin$222,114
- Illinois$295,943
- United States$366,157
When this market ran hot
Each cell is that month's year-on-year home-value growth. Read left to right, top row is the latest year — the 2021–22 band is the boom.
Zip codes with a Hennepin address
A different geography, not a breakdown. The figure above covers the municipality; these zips cover everywhere the Post Office calls Hennepin — often including townships beyond the city limits. Both come straight from Zillow, and they are not expected to average out.
Zillow publishes no zip-level series with this city on the address.