Rock Dell is a township in Olmsted County, Minnesota, home to about 772 people across 36 square miles. It has no ZIP code of its own: it’s part of 55920, 55940 and 55976.
Homes sold for a median of $172 per square foot across 3 ZIP codes in the three months ending August 2026, and all of them were seller’s markets.
Mostly Byron; part is in Rock Dell
Mostly Hayfield City; part is in Rock Dell
Mostly Stewartville; part is in Rock Dell
Each card is that ZIP code’s whole market, including any part outside Rock Dell. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Rock Dell’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field (MSP)75 miles away |
|---|---|
| Closer regional airport | Rochester International Airport (RST)5 miles away |
| Nearest city of 250,000+ | St. Paul, MN77 miles away |
| Nearest city of 1 million+ | Chicago, IL286 miles away |
Straight-line distances from the center of Rock Dell; 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 Dell had 681 residents in the 2020 census, up 9% since 2000.
It’s the 757th largest of 2,727 towns in Minnesota by population.
Olmsted County grew from 23,119 residents in 1900 to 162,847 in 2020.
Olmsted County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 80°F in summer, and winter lows average 7°F. About 34.7 inches of rain and melted snow fall in a typical year, with about 53 inches of snow.
Source: NOAA 1991–2020 climate normals, Rochester Intl Ap, MN weather station (5 miles away).
107,285 jobs at 3,754 businesses in Olmsted County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
47 doctors and other health care providers list an office in Rock Dell’s ZIP codes.
Nearest hospitals
Providers with an office here
| Primary care doctors | 7 |
|---|---|
| Specialist doctors | 1 |
| Dentists | 11 |
| Nurse practitioners and physician assistants | 6 |
| Mental health providers | 10 |
| Physical and occupational therapists | 2 |
| Optometrists | 1 |
| Chiropractors | 9 |
| Pharmacies | 4 |
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.
Grocery stores
Pharmacies
Libraries
Museums
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.
Public schools here are run by Byron Public School District, Stewartville Public School District, Hayfield Public School District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Byron Primary SchoolByron | Pre-K–2 | 519 | Public | 9.7 mi |
| Central Education CenterStewartville | Pre-K | 41 | Special Education | 5.8 mi |
| Hayfield ElementaryHayfield | Pre-K–5 | 302 | Public | 12.2 mi |
| Bonner ElementaryStewartville | K–2 | 411 | Public | 6.5 mi |
| Bear Cave Intermediate SchoolStewartville | 3–5 | 436 | Public | 4.9 mi |
| Byron Intermediate SchoolByron | 3–5 | 551 | Public | 9.6 mi |
| Byron Middle SchoolByron | 6–8 | 577 | Public | 10.0 mi |
| Hayfield SecondaryHayfield | 6–12 | 319 | Public | 12.2 mi |
| Stewartville MiddleStewartville | 6–8 | 480 | Public | 5.8 mi |
| Byron Senior High SchoolByron | 9–12 | 695 | Public | 11.1 mi |
| Stewartville Senior HighStewartville | 9–12 | 608 | Public | 5.8 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 Stewartville, Byron, Hayfield City, Kalmar, Salem, High Forest, Vernon, Rochester, Pleasant Grove, Hayfield Township, Sumner, Westfield and Ashland.
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.