Postal reference / United States
78374Portland, Texas
ZIP code 78374 is a United States postal code for Portland, Texas. Its county association is San Patricio County. The map reference point is at 27.8935, -97.3169.
- State / territory
- Texas
- Recorded place name
- Portland
- County association
- San Patricio
- Estimated coordinate
- 27.8935, -97.3169
View on OpenStreetMap - ZIP prefix
- 783 · 49 ZIP codes share it
- Data source
- GeoNames postal reference, snapshot September 26, 2026
GeoNames reference data. County associations may not include every intersecting county, place names are postal names rather than legal boundaries, and coordinates are approximate. This is not address validation.
Area
- Land area
- 18.544 sq mi (2023 Census Gazetteer)
Figures are for the ZIP Code Tabulation Area (ZCTA) that most closely matches this ZIP code, not an exact match to USPS delivery boundaries. Source: U.S. Census Bureau, 2023 Gazetteer + 2023 ACS 5-Year Estimates, retrieved 2026-09-27. How to read this data.
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Texas directoryNearby ZIP code reference points
| ZIP code | Place | State | County association | Miles |
|---|---|---|---|---|
| 78359 | Gregory | TX | San Patricio | 2.6 |
| 78402 | Corpus Christi | TX | Nueces | 6.3 |
| 78362 | Ingleside | TX | San Patricio | 6.9 |
| 78390 | Taft | TX | San Patricio | 7.5 |
| 78335 | Aransas Pass | TX | San Patricio | 8.0 |
| 78427 | Corpus Christi | TX | Nueces | 8.0 |
| 78460 | Corpus Christi | TX | Nueces | 8.0 |
| 78401 | Corpus Christi | TX | Nueces | 8.7 |
Straight-line distance between reference points. Nearby points do not prove that ZIP areas touch.
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