Somonauk is a village in DeKalb County, Illinois, home to about 1,569 people across 2.5 square miles. It has no ZIP code of its own: it’s part of 60552.
Homes sold for a median of $198 per square foot in the three months ending August 2026, a balanced market.
Mostly Lake Holiday; part is in Somonauk
Each card is that ZIP code’s whole market, including any part outside Somonauk. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Somonauk’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Chicago O'Hare International Airport (ORD)46 miles away |
|---|---|
| Nearest city of 250,000+ | Chicago, IL53 miles away |
Straight-line distances from the center of Somonauk; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Somonauk had 1,786 residents in the 2020 census, up 38% since 2000.
It’s the 569th largest of 1,450 towns in Illinois by population.
DeKalb County grew from 31,756 residents in 1900 to 100,420 in 2020.
DeKalb County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 84°F in summer, and winter lows average 15°F. About 33.9 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Chicago Aurora Muni Ap, IL weather station (14 miles away).
29,129 jobs at 1,975 businesses in DeKalb County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
5 doctors and other health care providers list an office in Somonauk.
Nearest hospitals
Providers with an office here
| Dentists | 1 |
|---|---|
| Mental health providers | 3 |
| Chiropractors | 1 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (3 nearby)
Grocery stores
Pharmacies
Libraries (1 nearby)
Museums
Counts are within about 1.5 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Public schools here are run by Somonauk CUSD 432. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| James R Wood Elem SchoolSomonauk | Pre-K–4 | 298 | Public | 0.6 mi |
| Somonauk Middle SchoolSomonauk | 5–8 | 249 | Public | 0.7 mi |
| Somonauk High SchoolSomonauk | 9–12 | 224 | Public | 0.7 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Lake Holiday.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.