San Juan, TX ZIP Code
San Juan, Texas has one ZIP code: .
Mail addressed to San Juan covers nearby places too.
Where the 78589 ZIP code reaches
Tap or point to an area to see its ZIP code.Full-size map
Dashed line: San Juan city limits.
Map: Census Bureau ZIP Code Tabulation Areas (2020) and place limits (2024).
Check an address in San Juan
Street ranges from the Census Bureau, 2026. PO box and organization ZIP codes are not found by street. A new street may be missing: address not found?
Why your mail may say San Juan when you live outside it
San Juan ZIP codes also cover North Alamo and Lopezville, so a letter addressed to San Juan can go to a home outside the city limits.
A ZIP code does not set your city, school district or tax. Hidalgo County property records show which city you are in.
San Juan ZIP code questions
What is the main ZIP code for San Juan?
78589, the ZIP code of the main San Juan post office at 100 W Amy Dr.
What county is San Juan in?
Hidalgo County.
ZIP codes for towns near San Juan
More towns near San Juan: Brownsville, Corpus Christi, Laredo, Victoria, San Antonio, Schertz, Cibolo, Seguin, New Braunfels.
Sources and last checked
USPS ZIP Locale Detail (October 1, 2026), GeoNames (CC BY 4.0), U.S. Census Bureau, HUD-USPS crosswalk.
Checked October 20, 2026. Sources · How we build our lists · Corrections