Winthrop Iowa ZIP Codes
Winthrop holds a single ZIP code.
Every ZIP code in Winthrop
| ZIP code | County |
|---|---|
| 50682 | Buchanan 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Winthrop codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Winthrop. 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 Winthrop ZIP code begins 506. Those first three digits identify the sectional center facility that processes mail for this part of Iowa. Statewide that range covers 70 ZIP codes, so Winthrop accounts for 1% of it.
Every Iowa ZIP prefix and the region it covers →
Area codes covering Winthrop
ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The code below serves the same ground Winthrop occupies.
Winthrop Iowa area codes in full →
Where Winthrop's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Winthrop
| City | Distance | ZIP codes |
|---|---|---|
| Quasqueton Iowa ZIP codes | 5.4 mi | 1 ZIP code |
| Masonville Iowa ZIP codes | 7.5 mi | 1 ZIP code |
| Independence Iowa ZIP codes | 8.5 mi | 1 ZIP code |
| Rowley Iowa ZIP codes | 8.9 mi | 1 ZIP code |
| Lamont Iowa ZIP codes | 10 mi | 1 ZIP code |
| Aurora Iowa ZIP codes | 10 mi | 1 ZIP code |
| Dundee Iowa ZIP codes | 12 mi | 1 ZIP code |
| Stanley Iowa ZIP codes | 12 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.