Kalmar is a township in Olmsted County, Minnesota, home to about 1,496 people across 33 square miles. It has no ZIP code of its own: it’s part of 55920 and 55960.
Homes sold for a median of $204 per square foot across 2 ZIP codes in the three months ending August 2026, and 1 of 2 were seller’s markets.
Mostly Byron; part is in Kalmar
Mostly Oronoco City; part is in Kalmar
Each card is that ZIP code’s whole market, including any part outside Kalmar. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Kalmar’s story and what everyday life there is like, for people thinking about moving in.
Are you a local agent who knows Kalmar well? Agents who advertise here will be able to write the guide. Advertise on OfferBacked
| Nearest major airport | Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field (MSP)65 miles away |
|---|---|
| Closer regional airport | Rochester International Airport (RST)11 miles away |
| Nearest city of 250,000+ | St. Paul, MN67 miles away |
| Nearest city of 1 million+ | Chicago, IL292 miles away |
Straight-line distances from the center of Kalmar; 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.
Kalmar had 1,117 residents in the 2020 census, down 7% since 2000.
It’s the 428th 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 81°F in summer, and winter lows average 4°F. About 35.9 inches of rain and melted snow fall in a typical year, with about 44 inches of snow.
Source: NOAA 1991–2020 climate normals, Byron 4north, MN weather station (3 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).
27 doctors and other health care providers list an office in Kalmar’s ZIP codes.
Nearest hospitals
Providers with an office here
| Primary care doctors | 5 |
|---|---|
| Specialist doctors | 1 |
| Dentists | 5 |
| Nurse practitioners and physician assistants | 5 |
| Mental health providers | 6 |
| Physical and occupational therapists | 1 |
| Optometrists | 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.
Parks (9 nearby)
Grocery stores (1 nearby)
Pharmacies
Libraries
Museums (1 nearby)
Theaters and performance venues
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. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Byron Primary SchoolByron | Pre-K–2 | 519 | Public | 1.3 mi |
| Byron Intermediate SchoolByron | 3–5 | 551 | Public | 1.3 mi |
| Byron Middle SchoolByron | 6–8 | 577 | Public | 2.3 mi |
| Byron Senior High SchoolByron | 9–12 | 695 | Public | 1.7 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 Byron, Oronoco City, Oronoco Township, Salem, Cascade, Rochester, New Haven and Rock Dell.
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.