Darmstadt is a community in St. Clair County, Illinois, home to about 18 people across 0.1 square miles. It has no ZIP code of its own: it’s part of 62255.
Homes sold for a median of $136 per square foot in the three months ending August 2026, a seller’s market.
Mostly Lenzburg; part is in Darmstadt
Each card is that ZIP code’s whole market, including any part outside Darmstadt. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Darmstadt’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | St. Louis Lambert International Airport (STL)44 miles away |
|---|---|
| Closer regional airport | Scott AFB/Midamerica Airport (BLV)17 miles away |
| Nearest city of 250,000+ | St. Louis, MO34 miles away |
| Nearest city of 1 million+ | Chicago, IL269 miles away |
Straight-line distances from the center of Darmstadt; 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.
Darmstadt had 49 residents in the 2020 census, down 28% since 2010.
It’s the 1440th largest of 1,450 towns in Illinois by population.
St. Clair County grew from 86,685 residents in 1900 to 257,400 in 2020.
St. Clair County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 88°F in summer, and winter lows average 22°F. About 45.7 inches of rain and melted snow fall in a typical year, with about 11 inches of snow.
Source: NOAA 1991–2020 climate normals, Sparta 1 W, IL weather station (13 miles away).
72,871 jobs at 4,973 businesses in St. Clair County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2022 (private employers; jobs counted where people work).
Nearest hospitals
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances.
Libraries
Counts are within about 1 mile 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.
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Shares ZIP codes with Lenzburg.
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.