Portland Texas ZIP Codes
Portland holds a single ZIP code.
Every ZIP code in Portland
| ZIP code | County |
|---|---|
| 78374 | San Patricio 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Portland codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Portland. 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 Portland ZIP code begins 783. Those first three digits identify the sectional center facility that processes mail for this part of Texas. Statewide that range covers 49 ZIP codes, so Portland accounts for 2% of it.
Every Texas ZIP prefix and the region it covers →
Area codes covering Portland
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 Portland occupies.
Portland Texas area codes in full →
Where Portland's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Portland
| City | Distance | ZIP codes |
|---|---|---|
| Gregory Texas ZIP codes | 3.4 mi | 1 ZIP code |
| Taft Texas ZIP codes | 7.3 mi | 1 ZIP code |
| Ingleside Texas ZIP codes | 7.7 mi | 1 ZIP code |
| Corpus Christi Texas ZIP codes | 13 mi | 30 ZIP codes |
| Aransas Pass Texas ZIP codes | 14 mi | 2 ZIP codes |
| Sinton Texas ZIP codes | 15 mi | 1 ZIP code |
| Port Aransas Texas ZIP codes | 16 mi | 1 ZIP code |
| Bayside Texas ZIP codes | 16 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.