Wilmington is a township in Houston County, Minnesota, home to about 385 people across 36 square miles. It has no ZIP code of its own: it’s part of 55921 and 55974.
Homes sold for a median of $118 per square foot across 2 ZIP codes in the three months ending August 2026, and 1 of 2 were seller’s markets.
Mostly Caledonia City; part is in Wilmington
Mostly Spring Grove City; part is in Wilmington
Each card is that ZIP code’s whole market, including any part outside Wilmington. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Wilmington’s story and what everyday life there is like, for people thinking about moving in.
Are you a local agent who knows Wilmington 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)121 miles away |
|---|---|
| Closer regional airport | La Crosse Regional Airport (LSE)25 miles away |
| Nearest city of 250,000+ | St. Paul, MN121 miles away |
| Nearest city of 1 million+ | Chicago, IL231 miles away |
Straight-line distances from the center of Wilmington; 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.
Wilmington had 427 residents in the 2020 census, down 10% since 2000.
It’s the 1283rd largest of 2,727 towns in Minnesota by population.
Houston County grew from 15,400 residents in 1900 to 18,843 in 2020.
Houston 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 8°F. About 38.4 inches of rain and melted snow fall in a typical year, with about 45 inches of snow.
Source: NOAA 1991–2020 climate normals, Caledonia, MN weather station (4 miles away).
4,309 jobs at 394 businesses in Houston County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
20 doctors and other health care providers list an office in Wilmington’s ZIP codes.
Nearest hospitals
Providers with an office here
| Primary care doctors | 4 |
|---|---|
| Dentists | 3 |
| Nurse practitioners and physician assistants | 4 |
| Mental health providers | 3 |
| Physical and occupational therapists | 1 |
| Chiropractors | 5 |
| Pharmacies | 6 |
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 (1 nearby)
Grocery stores (2 nearby)
Libraries
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 Caledonia Public School District, Spring Grove School District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Caledonia ElementaryCaledonia | Pre-K–5 | 295 | Public | 4.4 mi |
| Spring Grove ElementarySpring Grove | Pre-K–6 | 186 | Public | 4.2 mi |
| Houston County JDC SchoolCaledonia | 4–12 | 1 | Alternative Education | 4.6 mi |
| Caledonia MiddleCaledonia | 6–8 | 138 | Public | 4.6 mi |
| Spring Grove SecondarySpring Grove | 7–12 | 163 | Public | 4.2 mi |
| Caledonia Senior HighCaledonia | 9–12 | 259 | Public | 4.6 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| St John's Evangelical Lutheran SchoolCaledonia | Pre-K–8 | 75 | Wisconsin Evangelical Lutheran Synod | 5.0 mi |
| St Marys Catholic SchoolCaledonia | Pre-K–8 | 109 | Roman Catholic | 4.6 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools; Private School Universe Survey (2023-2024) for private schools. Listed by address; we don’t rate schools.
Buying or selling around Wilmington? Tell us what you need and when. No agents advertise here yet, so we’ll keep your request for up to 30 days and send it to local agents who join. No obligation, and you choose who to work with.
Loading map…
Shares ZIP codes with Caledonia City, Spring Grove City, Caledonia Township, Mayville, Black Hammer, Union, Spring Grove Township, Sheldon, Winnebago Township, Crooked Creek and Jefferson.
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.