San Isidro, TX ZIP Codes & Directory
San Isidro is located in Starr County in Texas. Browse all active 5-digit USPS ZIP codes serving San Isidro and surrounding Starr County delivery districts.
All ZIP Codes in San Isidro, TX
1 CodesAbout San Isidro Mail Delivery & Postal Administration
ZIP codes in San Isidro are administered by the United States Postal Service. Delivery routes are coordinated through regional Sectional Center Facilities (SCFs) servicing Starr County and surrounding Texas metropolitan districts.
Frequently Asked Questions About San Isidro, TX ZIP Codes
How many ZIP codes serve San Isidro, Texas? ▾
San Isidro, Texas is served by 1 active USPS postal delivery codes: 78588.
What county is San Isidro located in? ▾
San Isidro is an incorporated city located within Starr County, Texas.
What is the population and demographic size of San Isidro? ▾
According to official U.S. Census Bureau data, San Isidro has an estimated population of 168 residents and is situated within the undefined.
How does mail sorting and delivery work in San Isidro? ▾
Mail delivery in San Isidro is operated by the United States Postal Service (USPS) through regional Sectional Center Facility (SCF) distribution plants servicing Starr County and surrounding Texas counties.
How much does it cost to ship a package to San Isidro, TX? ▾
Shipping costs to San Isidro depend on the package weight, dimensions, shipping carrier (USPS, UPS, FedEx), and the distance from the origin ZIP code. To calculate exact postage rates, use our shipping cost estimator tool.
What is the standard delivery time for mail to San Isidro? ▾
Standard USPS Ground Advantage typically takes 2-5 business days to reach San Isidro, depending on the origin. Priority Mail generally arrives in 1-3 business days. Please check tracking for specific regional routing times.