County ZIP codes · Texas · FIPS 48245
Jefferson County, TX ZIP Codes
Jefferson County, Texas has 25 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 18 residential and 7 for PO boxes or a single organization. 17 of the residential ones lie mainly in Jefferson County and 1 mainly in a neighboring county; 2 cross the county line. Median household income ranges from $31,803 in 77703 to $91,330 in 77713 (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Jefferson County?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
How different are its ZIP codes?
The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $50,973 and $78,001.
They carry 10 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 18 residential ZIP codes in Jefferson County
17 ZIP codes lie mainly in Jefferson County; 1 more reaches into it from a neighboring county and follows the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 77642 | Port Arthur | 38,358 | 1,945 | $43k | $105k | 100% |
| 77705 | Beaumont | 38,259 | 158 | $55k | $136k | 100% |
| 77706 | Beaumont | 30,393 | 3,015 | $73k | $245k | 100% |
| 77627 | Nederland | 22,357 | 1,700 | $78k | $209k | 100% |
| 77707 | Beaumont | 18,323 | 1,291 | $70k | $174k | 100% |
| 77640 | Port Arthur | 17,167 | 460 | $51k | $110k | 100% |
| 77619 | Groves | 16,976 | 3,120 | $74k | $164k | 100% |
| 77713 | Beaumont | 15,541 | 151 | $91k | $227k | 100% |
| 77651 | Port Neches | 13,664 | 1,244 | $82k | $253k | 100% |
| 77701 | Beaumont | 12,381 | 1,807 | $49k | $84k | 100% |
| 77708 | Beaumont | 12,065 | 1,034 | $57k | $159k | 100% |
| 77703 | Beaumont | 11,004 | 1,266 | $32k | $88k | 100% |
| 77702 | Beaumont | 3,121 | 2,513 | $62k | $137k | 100% |
| 77622 | Hamshire | 1,818 | 90 | $101k | $208k | 100% |
| 77613 | China | 692 | 16 | $73k | $190k | 100% |
| 77629 | Nome | 435 | 7 | $63k | $176k | 73% |
| 77655 | Sabine Pass | 330 | 7 | $74k | $147k | 100% |
Partly in Jefferson County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 77665 | Winnie | 7,511 | 44 | $79k | $170k | 25% |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).
Which ZIP codes cross the county line?
2 ZIP codes of Jefferson County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Jefferson | Elsewhere |
|---|---|---|
| 77665 | 25% | Chambers County 75% |
| 77629 | 73% | Liberty County 27% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Jefferson County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Jefferson County's ZIP codes use 2 prefixes: 776 and 777.
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.