Sister Bay Wisconsin ZIP Codes
Sister Bay holds a single ZIP code.
Every ZIP code in Sister Bay
| ZIP code | County |
|---|---|
| 54234 | Door County |
We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Sister Bay codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Sister Bay. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated . ZIP codes are delivery-route groupings, not areas; the boundaries implied by any ZIP map are approximations.
How these codes cluster
Every Sister Bay ZIP code begins 542. Those first three digits identify the sectional center facility that processes mail for this part of Wisconsin. Statewide that range covers 30 ZIP codes, so Sister Bay accounts for 3% of it.
Every Wisconsin ZIP prefix and the region it covers →
Area codes covering Sister Bay
ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The codes below serve the same ground Sister Bay occupies.
Sister Bay Wisconsin area codes in full →
Where Sister Bay's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Sister Bay
| City | Distance | ZIP codes |
|---|---|---|
| Ephraim Wisconsin ZIP codes | 2.5 mi | 1 ZIP code |
| Egg Harbor Wisconsin ZIP codes | 13 mi | 1 ZIP code |
| Marinette Wisconsin ZIP codes | 26 mi | 1 ZIP code |
| Sturgeon Bay Wisconsin ZIP codes | 28 mi | 1 ZIP code |
| Peshtigo Wisconsin ZIP codes | 31 mi | 1 ZIP code |
| Forestville Wisconsin ZIP codes | 38 mi | 1 ZIP code |
| Oconto Wisconsin ZIP codes | 41 mi | 1 ZIP code |
| Wausaukee Wisconsin ZIP codes | 42 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.