Plymouth Iowa ZIP Codes
Plymouth holds a single ZIP code.
Every ZIP code in Plymouth
| ZIP code | County |
|---|---|
| 50464 | Cerro Gordo 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Plymouth codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Plymouth. 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 Plymouth ZIP code begins 504. Those first three digits identify the sectional center facility that processes mail for this part of Iowa. Statewide that range covers 57 ZIP codes, so Plymouth accounts for 2% of it.
Every Iowa ZIP prefix and the region it covers →
Area codes covering Plymouth
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 Plymouth occupies.
Plymouth Iowa area codes in full →
Where Plymouth's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Plymouth
| City | Distance | ZIP codes |
|---|---|---|
| Rock Falls Iowa ZIP codes | 3.3 mi | 1 ZIP code |
| Manly Iowa ZIP codes | 4.9 mi | 1 ZIP code |
| Grafton Iowa ZIP codes | 6.4 mi | 1 ZIP code |
| Mason City Iowa ZIP codes | 7.8 mi | 2 ZIP codes |
| Kensett Iowa ZIP codes | 8.6 mi | 1 ZIP code |
| Nora Springs Iowa ZIP codes | 9.1 mi | 1 ZIP code |
| Carpenter Iowa ZIP codes | 13 mi | 1 ZIP code |
| Hanlontown Iowa ZIP codes | 13 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.