Lanark is a city in Carroll County, Illinois, home to about 1,541 people across 1.1 square miles. Its ZIP code is 61046.
Homes sold for a median of $141 per square foot in the three months ending August 2026, a seller’s market.
Mostly Lanark; also Lake Carroll
Each card is that ZIP code’s whole market, including any part outside Lanark. 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)99 miles away |
|---|---|
| Closer regional airport | Chicago Rockford International Airport (RFD)38 miles away |
| Nearest city of 250,000+ | Madison, WI72 miles away |
| Nearest city of 1 million+ | Chicago, IL111 miles away |
Straight-line distances from the center of Lanark; 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.
Lanark had 1,504 residents in the 2020 census, down 5% since 2000.
It’s the 576th largest of 1,450 towns in Illinois by population.
Carroll County grew from 18,963 residents in 1900 to 15,702 in 2020.
Carroll County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 85°F in summer, and winter lows average 11°F. About 40.3 inches of rain and melted snow fall in a typical year, with about 33 inches of snow.
Source: NOAA 1991–2020 climate normals, Mt Carroll, IL weather station (8 miles away).
3,011 jobs at 363 businesses in Carroll County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
6 doctors and other health care providers list an office in Lanark.
Nearest hospitals
Providers with an office here
| Primary care doctors | 1 |
|---|---|
| Dentists | 1 |
| Mental health providers | 1 |
| Chiropractors | 3 |
| Pharmacies | 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.
Libraries (1 nearby)
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.
Public schools here are run by Eastland CUSD 308. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Eastland Jr/Sr High SchoolLanark | 7–12 | 298 | Public | 0.3 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 Carroll.
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.