ZIP codes

ZIP codes in Guadalupe County, Texas

Guadalupe County has 13 ZIP codes. 3 lie entirely inside it and 10 are shared with neighboring counties, so part of their land and their people are elsewhere. About 187,087 people live in the parts inside it (ACS 2020–2024).

By the All Map Tools Team

ZIP codes: 13; 1 more just touches the border (under 1% of their land)
Entirely inside: 3; 99% or more of their land
Shared with other counties: 10; Most with Comal County (4)
Most populated ZIP: 78130; 104,009 people · New Braunfels
Least populated ZIP: 78670; 130 people · Staples
Largest ZIP by land: 78155; 355 sq mi · Seguin

Map of the ZIP codes in Guadalupe 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 Guadalupe County

13 ZIP codes in Guadalupe County, TX, by number
ZIP code	Main city	Population	Land in the county	Residents in the county
78108	Cibolo	49,784	87%	≈ 47,702
78121	La Vernia	16,120	25%	≈ 1,568
78123	McQueeney	2,127	100%	2,127
78124	Zuehl	6,157	88%	≈ 5,839
78130	New Braunfels	104,009	56%	≈ 38,113
78140	Nixon	3,474	3.3%	≈ 196
78154	Schertz	41,907	32%	≈ 27,720
78155	Seguin	55,600	100%	55,600
78638	Kingsbury	2,135	98%	≈ 2,111
78648	Luling	7,863	15%	≈ 415
78655	Martindale	3,730	40%	≈ 1,028
78666	San Marcos	88,583	16%	≈ 4,219
78670	Staples	130	100%	130

They also touch the county with under 1% of their land, so they aren’t counted: 78132.

ZIP codes shared with other counties

These 10 ZIP codes have part of their land in another county. The first figure is the share of their land in Guadalupe County; then, where the rest lies.

78108 (Cibolo): 87% here; 10% in Bexar County and 2.7% in Comal County.
78121 (La Vernia): 25% here; 75% in Wilson County.
78124 (Zuehl): 88% here; 12% in Bexar County.
78130 (New Braunfels): 56% here; 43% in Comal County.
78140 (Nixon): 3.3% here; 68% in Gonzales County, 27% in Wilson County, and 1.9% in Karnes County.
78154 (Schertz): 32% here; 56% in Bexar County and 12% in Comal County.
78638 (Kingsbury): 98% here; 1.7% in Gonzales County.
78648 (Luling): 15% here; 76% in Caldwell County and 8.9% in Gonzales County.
78655 (Martindale): 40% here; 60% in Caldwell County.
78666 (San Marcos): 16% here; 78% in Hays County, 4.3% in Comal County, and 2.0% in Caldwell 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 Cibolo (1), Kingsbury (1), La Vernia (1), Luling (1), Martindale (1), and McQueeney (1); 13 places in all.

They start with 2 different three-digit prefixes, one per USPS sorting center: 781 and 786.

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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