ZIP code · Sister Bay · Wisconsin · United States

ZIP code 54234 — Sister Bay

ZIP code 54234 serves Sister Bay, Wisconsin.

Postal code
54234
Single source Value from one source, not cross-checked.
City
Sister Bay
County
Door FIPS 55029
State
Wisconsin
Country
United States
Coordinates
45.1875, -87.1139 — precision precise (locality)
View on OpenStreetMap
Population
2,130 (ZCTA, ACS 5-year)
Population density
91 / sq mi
Land area
23.4 sq mi (60.7 km²) (ZCTA, ACS 5-year)
Median household income
$72,762
Per-capita income
$49,661
Median age
59.4
Households
1,097
Housing units
2,350
Median home value
$419,600
Median gross rent
$1,140 / month
Congressional district
WI-8 (119th Congress)
USDA hardiness zone
5b (-15 to -10 °F)
Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
Time zone
America/Menominee (UTC−6 / UTC−5 DST)
Area code
920
Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.

Climate — monthly normals

Warmest month Jul (avg high 80°F), coldest Jan (avg low 12°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F272939516574807870574433
Avg low °F121321314253585751413019
Precip in1.71.11.72.73.53.33.03.03.43.62.31.7

NOAA 1991–2020 climate normals from the nearest station: EPHRAIM 1NE-WWTP (2.2 mi) · NOAA NCEI

Places in ZIP 54234

Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology

About this page

US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.

GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page