Ontario is a village in Vernon County, Wisconsin, home to about 422 people across 1.0 square miles. Its ZIP code is 54651.
Homes sold for a median of $248 per square foot in the three months ending August 2026, a seller’s market.
Mostly Ontario; also Whitestown and Wellington
Each card is that ZIP code’s whole market, including any part outside Ontario. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Ontario’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | General Mitchell International Airport (MKE)147 miles away |
|---|---|
| Closer regional airport | La Crosse Regional Airport (LSE)34 miles away |
| Nearest city of 250,000+ | Madison, WI74 miles away |
| Nearest city of 1 million+ | Chicago, IL197 miles away |
Straight-line distances from the center of Ontario; 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.
Ontario had 534 residents in the 2020 census, up 12% since 2000.
It’s the 1567th largest of 1,889 towns in Wisconsin by population.
Vernon County grew from 28,351 residents in 1900 to 30,714 in 2020.
Vernon 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 11°F. About 35 inches of rain and melted snow fall in a typical year, with about 55 inches of snow.
Source: NOAA 1991–2020 climate normals, Cashton, WI weather station (8 miles away).
7,182 jobs at 686 businesses in Vernon County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
1 doctors and other health care providers list an office in Ontario.
Nearest hospitals
Providers with an office here
| Physical and occupational therapists | 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.
Public schools here are run by Norwalk-Ontario-Wilton School District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Norwalk-Ontario-Wilton ElementaryOntario | Pre-K–6 | 322 | Public | 3.7 mi |
| Brookwood HighOntario | 7–12 | 264 | Public | 3.7 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 Whitestown, Wellington, Sheldon Town and Forest Town (Vernon County).
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.