Rock Lake is a township in Lyon County, Minnesota, home to about 248 people across 33 square miles. It has no ZIP code of its own: it’s part of 56115.
Homes sold for a median of $106 per square foot in the three months ending August 2026, a seller’s market.
Mostly Balaton; part is in Rock Lake
Each card is that ZIP code’s whole market, including any part outside Rock Lake. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
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| Nearest major airport | Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field (MSP)139 miles away |
|---|---|
| Closer regional airport | Sioux Falls Regional Airport (FSD)61 miles away |
| Nearest city of 250,000+ | Minneapolis, MN138 miles away |
| Nearest city of 1 million+ | Chicago, IL445 miles away |
Straight-line distances from the center of Rock Lake; 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 Lake had 272 residents in the 2020 census, down 4% since 2000.
It’s the 1648th largest of 2,727 towns in Minnesota by population.
Lyon County grew from 14,591 residents in 1900 to 25,269 in 2020.
Lyon 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 5°F. About 29.1 inches of rain and melted snow fall in a typical year, with about 49 inches of snow.
Source: NOAA 1991–2020 climate normals, Tracy, MN weather station (13 miles away).
12,732 jobs at 814 businesses in Lyon County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
2 doctors and other health care providers list an office in Rock Lake.
Nearest hospitals
Providers with an office here
| Dentists | 2 |
|---|
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 (2 nearby)
Libraries (1 nearby)
Counts are within about 4 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.
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Shares ZIP codes with Balaton, Shelburne, Skandia, Lyons Township (Lyon County), Custer and Ellsborough.
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.