Oulu is a town in Bayfield County, Wisconsin, home to about 477 people across 35 square miles. It has no ZIP code of its own: it’s part of 54820 and 54847.
Homes sold for a median of $219 per square foot across 2 ZIP codes in the three months ending August 2026, and 0 of 2 were seller’s markets.
Mostly Brule; part is in Oulu
Mostly Iron River; part is in Oulu
Each card is that ZIP code’s whole market, including any part outside Oulu. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Oulu’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)145 miles away |
|---|---|
| Closer regional airport | Duluth International Airport (DLH)40 miles away |
| Nearest city of 250,000+ | St. Paul, MN138 miles away |
| Nearest city of 1 million+ | Chicago, IL377 miles away |
Straight-line distances from the center of Oulu; 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.
Oulu had 560 residents in the 2020 census, up 4% since 2000.
It’s the 1491st largest of 1,889 towns in Wisconsin by population.
Bayfield County grew from 14,392 residents in 1900 to 16,220 in 2020.
Bayfield County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 78°F in summer, and winter lows average 2°F. About 33.6 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Brule Rs, WI weather station (7 miles away).
2,612 jobs at 469 businesses in Bayfield County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
16 doctors and other health care providers list an office in Oulu’s ZIP codes.
Nearest hospitals
Providers with an office here
| Primary care doctors | 5 |
|---|---|
| Dentists | 3 |
| Nurse practitioners and physician assistants | 2 |
| Mental health providers | 6 |
| 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 (6 nearby)
Grocery stores (1 nearby)
Pharmacies (1 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.
Public schools here are run by Maple School District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Iron River ElementaryIron River | Pre-K–5 | 95 | Public | 2.4 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 Iron River, Hughes, Brule, Tripp, Delta, Orienta, Barnes, Highland Town (Douglas County), Cloverland Town and Pilsen.
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.