Portsmouth Iowa ZIP Codes
Portsmouth holds a single ZIP code.
Every ZIP code in Portsmouth
| ZIP code | County |
|---|---|
| 51565 | Shelby 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Portsmouth codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Portsmouth. 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 Portsmouth ZIP code begins 515. 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 Portsmouth accounts for 2% of it.
Every Iowa ZIP prefix and the region it covers →
Area codes covering Portsmouth
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 Portsmouth occupies.
Portsmouth Iowa area codes in full →
Where Portsmouth's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Portsmouth
| City | Distance | ZIP codes |
|---|---|---|
| Persia Iowa ZIP codes | 5.6 mi | 1 ZIP code |
| Panama Iowa ZIP codes | 5.7 mi | 1 ZIP code |
| Westphalia Iowa ZIP codes | 8.1 mi | 1 ZIP code |
| Harlan Iowa ZIP codes | 9.9 mi | 2 ZIP codes |
| Earling Iowa ZIP codes | 10 mi | 1 ZIP code |
| Shelby Iowa ZIP codes | 11 mi | 1 ZIP code |
| Woodbine Iowa ZIP codes | 12 mi | 1 ZIP code |
| Minden Iowa ZIP codes | 13 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.