Sister Bay is a village in Door County, Wisconsin, home to about 1,044 people across 2.6 square miles. Its ZIP code is 54234.
Homes sold for a median of $339 per square foot in the three months ending August 2026, a seller’s market.
Mostly Sister Bay; also Liberty Grove
Each card is that ZIP code’s whole market, including any part outside Sister Bay. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
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| Nearest major airport | General Mitchell International Airport (MKE)159 miles away |
|---|---|
| Closer regional airport | Delta County Airport (ESC)37 miles away |
| Nearest city of 250,000+ | Milwaukee, WI153 miles away |
| Nearest city of 1 million+ | Chicago, IL233 miles away |
Straight-line distances from the center of Sister Bay; 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.
Sister Bay had 1,148 residents in the 2020 census, up 30% since 2000.
It’s the 864th largest of 1,889 towns in Wisconsin by population.
Door County grew from 17,583 residents in 1900 to 30,066 in 2020.
Door County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 80°F in summer, and winter lows average 12°F. About 31.1 inches of rain and melted snow fall in a typical year, with about 62 inches of snow.
Source: NOAA 1991–2020 climate normals, Ephraim 1ne-Wwtp, WI weather station (2 miles away).
10,683 jobs at 1,292 businesses in Door County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2022 (private employers; jobs counted where people work).
28 doctors and other health care providers list an office in Sister Bay.
Nearest hospitals
Providers with an office here
| Primary care doctors | 3 |
|---|---|
| Dentists | 5 |
| Nurse practitioners and physician assistants | 5 |
| Mental health providers | 4 |
| Physical and occupational therapists | 8 |
| Chiropractors | 3 |
| Pharmacies | 4 |
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 (2 nearby)
Grocery stores (1 nearby)
Libraries (1 nearby)
Museums
Counts are within about 1.5 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.
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Shares ZIP codes with Liberty Grove.
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.