Somonauk, Illinois.
Typical home $323,104 (+6.5% in a year). Chicago-Naperville-Elgin, IL-IN-WI metro.
to buy the typical home at today's mortgage rate — +$972 (+134%) since Jan 2020.
- 1 year
- Up $19,659 +6%
- $303,446$323,104 since Sep 2025
- 5 years
- Up $86,551 +37%
- $236,553$323,104 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.
- Somonauk$1,696
- Illinois$1,553
- United States$1,922
At the last five years' pace, a typical home here doubles in price every 11 years.
Typical home values in Somonauk, IL rose 6.5% over the past year — faster than the nation's +1.2%.
Living in Somonauk, DeKalb County, Illinois
Somonauk is a village of 1,786 people in DeKalb County. Half its households earn more than $84,583 a year and half less, against $70,724 across DeKalb County; 4% of its people live below the poverty line. 74% of its homes are lived in by their owners and 26% are rented. Unemployment in DeKalb County was 3.7% in August 2026, and the county had 0.6% more jobs in 2025 than the year before. The most residents work in schools and health care, then shops.
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 It can be wrong or out of date.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. Somonauk is a small village in DeKalb County, with a population on the older side for the country. Most homes are lived in by their owners, and household incomes run above the county's, with few people living below the poverty line. Winters are cold, with January the coldest month, and summers are warm, with July the warmest; the year brings a fair amount of rain and melted snow.
Work. Residents work mostly in schools, hospitals and social care, followed by shops, restaurants and hotels, and manufacturing. Among the largest workplaces in Somonauk are the school district, Somonauk CUSD, the farm implement dealer AHW, and the trucking company PTS Worldwide. The typical commute is a fairly long one, and only a small share of people work from home.
Things to do. A short drive away, Somonauk Creek is a place to be near running water, and Silver Springs State Fish and Wildlife Area offers protected countryside to walk through. Sandwich City Hall, also a short drive off, serves as a theatre. For a longer day out, Starved Rock State Park is a well-known protected area a longer drive away.
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- 659households
- 23%of adults have a degree
- 4%below the poverty line
- 28 mintypical commute
- 7%work from home
What residents work in
Employed residents by industry, from the Census survey. DeKalb County had 36,506 jobs in 2025, 0.6% more than the year before (Bureau of Labor Statistics).
Weather through the year
Coldest in January, with highs near 30° and lows near 15°; warmest in July, with highs near 84° and lows near 62°. About 34 inches of rain and melted snow a year.
Average daily high and low, 1991–2020, at the Chicago Aurora Municipal Airport weather station, 14 miles away (NOAA).
Largest workplaces in Somonauk
- Somonauk CUSD 432School district152FTE
- AHWAg implement dealer41
- PTS WorldwideGeneral freight trucking, long-distance, truckload32
- Duro CastAluminum die-casting foundries28
Staff on average in 2025, as each workplace reported it to OSHA with its injury records: 3 workplaces with 20 or more staff, 101 people in all. 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
- Cold wavesRelatively high
- DroughtRelatively moderate
- TornadoesRelatively moderate
- Strong windRelatively moderate
FEMA’s National Risk Index (December 2025) rates the risk each natural hazard poses to the people, buildings and farms in Somonauk’s census tracts, against the rest of the country; all of them together, relatively low. 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 DeKalb County and the Chicago-Naperville-Elgin, IL-IN-WI metro.
Somonauk home values
Zillow measures a city over its municipal boundary. Against the state and national figures, mid-tier homes, smoothed and seasonally adjusted.
- Somonauk$323,104
- Illinois$295,943
- United States$366,157
Levy by levy, and a check of one home’s own bill, the site covers Ohio’s property tax.
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.
Market heat, inside the city limits
Homes for sale
Active for-sale inventory. More supply hands power to buyers.
- Somonauk14
New listings per month
Sellers arriving at the market.
- Somonauk5
Zip codes with a Somonauk address
A different geography, not a breakdown. The figure above covers the municipality; these zips cover everywhere the Post Office calls Somonauk — often including townships beyond the city limits. Both come straight from Zillow, and they are not expected to average out.