Ottawa is a town in Waukesha County, Wisconsin, home to about 3,644 people across 33 square miles. Its ZIP code is 53118, and parts of 53153 are in Ottawa too.
Homes sold for a median of $274 per square foot in the three months ending August 2026, a seller’s market.
Mostly Ottawa; also Dousman and Genesee
Mostly North Prairie; part is in Ottawa
Each card is that ZIP code’s whole market, including any part outside Ottawa. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Ottawa’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)29 miles away |
|---|---|
| Nearest city of 250,000+ | Milwaukee, WI26 miles away |
| Nearest city of 1 million+ | Chicago, IL91 miles away |
Straight-line distances from the center of Ottawa; 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.
Ottawa had 3,646 residents in the 2020 census, down 3% since 2000.
It’s the 254th largest of 1,889 towns in Wisconsin by population.
Waukesha County grew from 35,229 residents in 1900 to 406,978 in 2020.
Waukesha County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 82°F in summer, and winter lows average 11°F. About 37.8 inches of rain and melted snow fall in a typical year, with about 51 inches of snow.
Source: NOAA 1991–2020 climate normals, Sullivan 3se, WI weather station (5 miles away).
246,232 jobs at 12,761 businesses in Waukesha County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
19 doctors and other health care providers list an office in Ottawa.
Nearest hospitals
Providers with an office here
| Primary care doctors | 1 |
|---|---|
| Dentists | 4 |
| Nurse practitioners and physician assistants | 3 |
| Mental health providers | 6 |
| Physical and occupational therapists | 4 |
| Chiropractors | 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 (8 nearby)
Grocery stores
Pharmacies
Libraries
Museums
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 Kettle Moraine School District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Dousman ElementaryDousman | Pre-K–5 | 311 | Public | 0.4 mi |
| Kettle Moraine MiddleDousman | 6–8 | 726 | Public | 0.3 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| St Bruno Parish SchoolDousman | Pre-K–8 | 74 | Roman Catholic | 0.4 mi |
| Lad Lake-Lakewood & Passage SchoolsDousman | 3–12 | 57 | Nonsectarian | 1.1 mi |
| Lad Lake-Lakewood & Passage SchoolDousman | 4–12 | 44 | Nonsectarian | 1.1 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.
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Shares ZIP codes with North Prairie, Dousman, Genesee and Sullivan Town.
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.