Portland ZIP codes, Iowa
No ZIP code is named for Portland, IA; addresses there use a neighbouring town's name. 2 ZIP codes cover it: 50401 and 50458. Its area code is 641.
- USPS city name
- 0 ZIP codes
- Overlapping the city
- 2 more
- Population
- 29
- Area code
- 641
- County
- Cerro Gordo County
- State
- Iowa
NANPA lists no telephone rate centre for Portland itself, so these are the area codes of the nearest one, Mason City (0.0 miles). A town on an area-code boundary can differ from its neighbour.
ZIP codes covering Portland
These ZIP codes cover part of Portland but are addressed as somewhere else.
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
50401 | Mason City , IA | Standard | 28,703 | $66,072 | $146,500 |
50458 | Nora Springs , IA | Standard | 2,094 | $99,643 | $157,500 |
Map of Portland ZIP codes
The ZIP codes of Portland, IA, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Towns near Portland
The nearest larger towns are Mason City (27,050 people, 3.6 mi), Rock Falls (119 people, 6.4 mi) and Nora Springs (1,363 people, 6.6 mi).
| Town | Population | Distance |
|---|---|---|
| Mason City | 27,050 | 3.6 mi |
| Clear Lake | 7,607 | 11.9 mi |
| Osage | 3,561 | 19.8 mi |
| Garner | 3,049 | 23.5 mi |
| Charles City | 7,232 | 23.7 mi |
| Hampton | 4,306 | 26.5 mi |
| Forest City | 4,290 | 26.8 mi |
More nearby: every ZIP code in Cerro Gordo County · Iowa ZIP codes
Cite this page
zipcodes.pro. “Portland, IA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ia/portland
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