ZIP codes

ZIP codes in Jefferson County, Texas

Jefferson County has 18 ZIP codes. 16 lie entirely inside it and 2 are shared with neighboring counties, so part of their land and their people are elsewhere. About 253,253 people live in the parts inside it (ACS 2020–2024).

By the All Map Tools Team

ZIP codes: 18; With 1% or more of their land inside
Entirely inside: 16; 99% or more of their land
Shared with other counties: 2; Most with Chambers County (1)
Most populated ZIP: 77642; 38,358 people · Port Arthur
Least populated ZIP: 77655; 330 people · Port Arthur
Largest ZIP by land: 77705; 243 sq mi · Beaumont

Map of the ZIP codes in Jefferson County

Entirely in the county (99% or more of its land)
Shared, mostly in this county
Shared, mostly in other counties
Neighboring counties

Open in the interactive tool

Each area is a ZIP code with its number where it fits. Hover over one to see its name.

All ZIP codes in Jefferson County

18 ZIP codes in Jefferson County, TX, by number
ZIP code	Main city	Population	Land in the county	Residents in the county
77613	China	692	100%	692
77619	Groves	16,976	100%	16,976
77622	Hamshire	1,818	100%	1,818
77627	Nederland	22,357	100%	22,357
77629	Nome	435	73%	≈ 309
77640	Port Arthur	17,167	100%	17,167
77642	Port Arthur	38,358	100%	38,358
77651	Port Neches	13,664	100%	13,664
77655	Port Arthur	330	100%	330
77665	Stowell	7,511	25%	≈ 495
77701	Beaumont	12,381	100%	12,381
77702	Beaumont	3,121	100%	3,121
77703	Beaumont	11,004	100%	11,004
77705	Beaumont	38,259	100%	38,259
77706	Beaumont	30,393	100%	30,393
77707	Beaumont	18,323	100%	18,323
77708	Beaumont	12,065	100%	12,065
77713	Beaumont	15,541	100%	15,541

ZIP codes shared with other counties

These 2 ZIP codes have part of their land in another county. The first figure is the share of their land in Jefferson County; then, where the rest lies.

77629 (Nome): 73% here; 27% in Liberty County.
77665 (Stowell): 25% here; 75% in Chambers County.

Cities and prefixes

By main city (the city, town or CDP each ZIP shares the most land with), the ones with the most are Beaumont (8), Port Arthur (3), China (1), Groves (1), Hamshire (1), and Nederland (1); 9 places in all.

They start with 2 different three-digit prefixes, one per USPS sorting center: 776 and 777.

Neighboring counties

Each one with its ZIP codes. Those without a page of their own open in the tool.

Tools for this county

ZIP codes by county or city The same ZIP codes on an interactive map, with the list as CSV or to copy County map with cities Its cities, towns and CDPs with their population ZIP codes in a radius The ZIP codes within 10 miles of its center, or any distance you like

Sources

U.S. Census Bureau, 2020 ZCTA to County, ZCTA to Place and ZCTA to Census Tract Relationship Files (and the 2022 County Subdivision to ZCTA file for Connecticut). Public domain.
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, table B01003 (population of each ZIP code, census tract and Connecticut town). Public domain.
U.S. Census Bureau, Vintage 2025 Population Estimates (county population) and 2025 Gazetteer Files (land area and interior point of each ZIP code). Public domain.
U.S. Census Bureau, Cartographic Boundary Files: ZCTAs 2020 and counties 2025, 1:500,000; county adjacency file 2025. Public domain.

How we count. ZIP codes here are the Census Bureau’s ZIP Code Tabulation Areas (ZCTAs), the areas it draws to match USPS ZIP codes; ZIPs with no area of their own (PO boxes, single buildings) aren’t included. A ZIP can cross county lines: “Land in the county” is the exact share of its land inside, from the Census relationship files. “Residents in the county” is the whole ZIP for those entirely inside; for shared ones it’s an estimate, spreading the people of each census tract over the land it shares with the ZIP. Population: ACS 2020–2024. Methodology.

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