What county is ZIP code 78638 in?
Updated · Data: U.S. Census Bureau
ZIP code 78638 (Kingsbury, TX) is mostly in Guadalupe County (98.3% of its land), with parts in Gonzales County.
Which counties is ZIP 78638 in?
| County | Share of land area | Chart |
|---|---|---|
| Guadalupe County | 98.3% | |
| Gonzales County | 1.7% |
About 2,064 people live in this ZIP code area. Because it crosses a county line, the county depends on the street: check your address.
Is ZIP 78638 a Census ZIP code area?
Yes. A ZIP Code Tabulation Area (ZCTA) is the Census version of a ZIP code; its edges can differ from USPS delivery routes (ZIP code vs ZCTA). Look up another ZIP on the ZIP code to county lookup.
Sources: Census 2020 ZCTA-county relationship file; Gazetteer 2024; GeoNames (CC BY 4.0, post office name); ACS 2019-2023 5-year. Data as of November 1, 2026. Not affiliated with USPS or any government agency.
FAQ
Frequently asked questions
What county is ZIP code 78638 in?
Is ZIP 78638 in Gonzales County?
What city is ZIP 78638?
Free · No signup · Private
Find your county now
Use your location, a city or a ZIP code. The check runs on your device; your location is never sent or stored.