Port Arthur, TX ZIP Codes
Port Arthur, Texas has 5 ZIP codes: 3 for street addresses (, and ) and 2 for PO boxes ( and ).
Your street decides which one you use.
Which Port Arthur ZIP code is my address in?
Street ranges from the Census Bureau, 2026. PO box and organization ZIP codes are not found by street. A new street may be missing: address not found?
Port Arthur ZIP code map
Tap or point to an area to see its ZIP code.Full-size map
77641 and 77643 have no area on the map: they are PO box or single-organization ZIP codes. Dashed line: Port Arthur city limits.
Map: Census Bureau ZIP Code Tabulation Areas (2020) and place limits (2024).
All Port Arthur ZIP codes by type
| ZIP | Type and post office or station |
|---|---|
| 77640 | street delivery Port Arthur |
| 77641 | PO boxes at the Port Arthur post office Port Arthur |
| 77642 | street delivery Port Arthur |
| 77643 | PO boxes at the Port Arthur post office Port Arthur |
| 77655 | street delivery; mail may be addressed to Sabine Pass Sabine Pass |
ZIP codes from nearby towns that reach into Port Arthur
- 77630, mailing town Orange, covers 3 percent of Port Arthur
Why your mail may say Port Arthur when you live outside it
A letter addressed to Port Arthur can go to a home outside the city limits, because ZIP areas follow delivery routes, not town lines.
The reverse happens too: parts of Port Arthur use 77630, which mails under a neighboring town's name.
A ZIP code does not set your city, school district or tax. Jefferson County property records show which city you are in.
Port Arthur ZIP code questions
What is the main ZIP code for Port Arthur?
77640, the ZIP code of the main Port Arthur post office at 345 Lakeshore Dr.
Which Port Arthur ZIP codes are for PO boxes only?
77641 and 77643. Mail to them goes to boxes at the post office, not to street addresses.
What county is Port Arthur in?
Jefferson County, with parts in Orange County.
ZIP codes for towns near Port Arthur
More towns near Port Arthur: Deer Park, Pasadena, Atascocita, League City, Galveston, Friendswood, Pearland, Spring, Houston.
Sources and last checked
USPS ZIP Locale Detail (October 1, 2026), GeoNames (CC BY 4.0), U.S. Census Bureau, HUD-USPS crosswalk.
Checked October 20, 2026. Sources · How we build our lists · Corrections