Rock City is a village in Stephenson County, Illinois, home to about 441 people across 0.1 square miles. Its ZIP code is 61070.
Homes sold for a median of $168 per square foot in the three months ending August 2026.
Each card is that ZIP code’s whole market, including any part outside Rock City. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
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| Nearest major airport | Chicago O'Hare International Airport (ORD)86 miles away |
|---|---|
| Closer regional airport | Chicago Rockford International Airport (RFD)24 miles away |
| Nearest city of 250,000+ | Madison, WI47 miles away |
| Nearest city of 1 million+ | Chicago, IL100 miles away |
Straight-line distances from the center of Rock City; 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.
Rock City had 293 residents in the 2020 census, down 6% since 2000.
It’s the 976th largest of 1,450 towns in Illinois by population.
Stephenson County grew from 34,933 residents in 1900 to 44,630 in 2020.
Stephenson County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 82°F in summer, and winter lows average 11°F. About 38.6 inches of rain and melted snow fall in a typical year, with about 35 inches of snow.
Source: NOAA 1991–2020 climate normals, Freeport Waste Wtp, IL weather station (10 miles away).
15,626 jobs at 1,003 businesses in Stephenson County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (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.
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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.