Residential delivery area · Wisconsin
ZIP Code 54234: Sister Bay, WI
ZIP code 54234 uses the postal name Sister Bay, Wisconsin and lies entirely in Door County (Census 2020 ZIP-county file). About 2,200 people live there (Census Bureau, ACS 2020-2024). Median household income is $74,583 (Census Bureau, ACS 2020-2024). By Census place, 11% of its land lies in Sister Bay, and under 1% in smaller places; 88% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Sister Bay · its only residential ZIP
- County
- Door County
- Census places
- Sister Bay
- House district
- WI-8 119th Congress
- State
- Wisconsin
- Time zone
- Central
- Land area
- 23.4 sq mi · 92 people per sq mi
Where is ZIP code 54234?
54234 centers on 45.182°, -87.102° and covers 23.4 square miles of land plus 0.0 of water. It borders 4 ZIP codes: 54211, 54210, 54202, 54212.
The map draws ZIP code areas only. For the streets inside 54234, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 54234 compare with the rest of Door County?
| Measure | 54234 | In Door County | In WI |
|---|---|---|---|
| People (ACS 2020-2024) | 2,158 | 5th of 13 | 465th of 783 |
| Median household income | $75k | 5th of 8 | 340th of 610 |
| Median home value | $456k | 1st of 9 | 18th of 612 |
Its median household income is higher than in 54% of U.S. residential ZIP codes, and it is denser than 53% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 54234?
The 2020 Census counted 2,072 people in 54234; the ACS, which samples households over 2020-2024, estimates 2,158. Between the 2010 and 2020 censuses its population grew 28.4% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 2,158±299 (90% margin)
- 2020 Census count
- 2,072+28.4% since 2010 (1,614)
- Households
- 1,121
- Median age
- 60.3
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 54234?
Of the 2,158 people the ACS estimates in 54234, 15.4% are under 18 and 42.9% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (96.0%).
- Under 1815.4%
- 18 to 6441.7%
- 65 and older42.9%
- White, not Hispanic96.0%
- Hispanic or Latino1.9%
- Other or two or more1.7%
- Asian, not Hispanic0.5%
- Black, not Hispanic0.0%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 54234 earn?
Median household income is $74,583 (ACS 2020-2024), the 5th highest of the 8 ranked ZIP codes in Door County. It is not measurably different from 2015-2019 ($70,169 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $74,583±$9,318
- Income per person
- $52,953
- Below the poverty line
- 13.8%
- Unemployed (of the labor force)
- 3.5%
- Adults 25+ with a bachelor's degree
- 52.3%
- Adjusted gross income per tax return, 2022
- $89,7161,310 returns; wages 43% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 54234?
FHFA's house price index for 54234, built from repeat sales and appraisals of the same homes, rose 127% from 2015 to 2025 and rose 88% from 2020 to 2025, and moved +0.3% in 2025.
- Median home value (owners' estimate)
- $456,300
- Median gross rent
- $1,328
- Homes owned by their occupants
- 69.0%
- Housing units
- 2,380
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 54234?
176 business establishments had a location in this ZIP code in 2023, 17 more than in 2018; the most are in accommodation and food services (ZIP Code Business Patterns).
- Accommodation and food services46
- Retail trade34
- Construction17
- Administrative and support and waste management and remediation services12
- Other services (except public administration)12
- Health care and social assistance9
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 54234?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 54211 | Ephraim | 403 | $101k | 3.5 mi |
| 54210 | Ellison Bay | 942 | $77k | 5.5 mi |
| 54202 | Baileys Harbor | 1,772 | $74k | 6.8 mi |
| 54212 | Fish Creek | 980 | $105k | 7.2 mi |
| 54209 | Egg Harbor | 1,485 | $77k | 14.0 mi (near) |
| 54246 | Washington Island | 803 | $70k | 16.5 mi (near) |
| 49858 | Menominee, MI | 11,927 | $53k | 21.9 mi (near) |
| 49893 | Wallace, MI | 1,320 | $63k | 25.8 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.