ZIP codes

ZIP codes in Liberty County, Texas

Liberty County has 14 ZIP codes. 6 lie entirely inside it and 8 are shared with neighboring counties, so part of their land and their people are elsewhere. About 106,134 people live in the parts inside it (ACS 2020–2024).

By the All Map Tools Team

ZIP codes: 14; 1 more just touches the border (under 1% of their land)
Entirely inside: 6; 99% or more of their land
Shared with other counties: 8; Most with Montgomery County (3)
Most populated ZIP: 77327; 42,685 people · Cleveland
Least populated ZIP: 77561; 36 people · Hardin; 1 more with nobody living there
Largest ZIP by land: 77327; 339 sq mi · Cleveland

Map of the ZIP codes in Liberty 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 Liberty County

14 ZIP codes in Liberty County, TX, by number
ZIP code	Main city	Population	Land in the county	Residents in the county
77327	Cleveland	42,685	99.9%	≈ 42,480
77328	Cleveland	17,208	8.4%	≈ 2,902
77357	Roman Forest	37,592	7.6%	≈ 1,672
77368	—	0	100%	0
77369	Big Thicket Lake Estates	738	97%	≈ 729
77372	Splendora	14,367	13%	≈ 1,549
77533	Daisetta	1,016	100%	1,016
77535	Dayton	39,504	97%	≈ 36,720
77538	Devers	917	100%	917
77561	Hardin	36	100%	36
77564	Hull	1,806	76%	≈ 1,591
77575	Liberty	16,613	97%	≈ 16,258
77582	Devers	135	100%	135
77629	Nome	435	27%	≈ 126

They also touch the county with under 1% of their land, so they aren’t counted: 77371.

ZIP codes shared with other counties

These 8 ZIP codes have part of their land in another county. The first figure is the share of their land in Liberty County; then, where the rest lies.

77328 (Cleveland): 8.4% here; 70% in San Jacinto County and 22% in Montgomery County.
77357 (Roman Forest): 7.6% here; 82% in Montgomery County and 10% in Harris County.
77369 (Big Thicket Lake Estates): 97% here; 2.7% in Hardin County.
77372 (Splendora): 13% here; 87% in Montgomery County.
77535 (Dayton): 97% here; 3.1% in Chambers County.
77564 (Hull): 76% here; 24% in Hardin County.
77575 (Liberty): 97% here; 2.6% in Chambers County.
77629 (Nome): 27% here; 73% in Jefferson 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 Cleveland (2), Devers (2), Big Thicket Lake Estates (1), Daisetta (1), Dayton (1), and Hardin (1); 11 places in all.

They start with 3 different three-digit prefixes, one per USPS sorting center: 773, 775, and 776.

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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