What county is Port Arthur, TX in?
Updated · Data: U.S. Census Bureau
Port Arthur, Texas is in Jefferson County.
Port Arthur at a glance
How close is Port Arthur to a county line?
The center of Port Arthur (its Census internal point) is about 2.9 mi from the Orange County line. Homes near the edge of town can be much closer; if you live near a line, check your address and the lookup will tell you how far you are from it.
What ZIP codes are in Port Arthur?
5 ZIP codes use the name Port Arthur or are centered in it. Shares are of each ZIP's land; a ZIP named after a town can reach beyond its city limits.
| ZIP | Post office name | County (land share) |
|---|---|---|
| 77640 | Port Arthur | Jefferson County |
| 77641 | Port Arthur | Jefferson County |
| 77642 | Port Arthur | Jefferson County |
| 77643 | Port Arthur | Jefferson County |
| 77655 | Sabine Pass | Jefferson County |
About Jefferson County
County seat: Beaumont. FIPS code 48245. Population 253,939. All Jefferson County facts.
Towns near Port Arthur
- Groves: 3.4 mi away, Jefferson County
- Port Neches: 5.8 mi away, Jefferson County
- Nederland: 8.0 mi away, Jefferson County
- Beauxart Gardens: 9.4 mi away, Jefferson County
- Bridge City: 9.7 mi away, Orange County
- Central Gardens: 9.7 mi away, Jefferson County
Port Arthur has about 55,779 people. It is an incorporated city or town.
Sources: ACS 2019-2023 5-year (residents by county, table B01003); Census TIGER/Line 2024 and Gazetteer 2024 (land, location); Census 2020 ZCTA file and GeoNames (ZIP codes). Data as of November 1, 2026. Not affiliated with any government agency.
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What county is Port Arthur, TX in?
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