San Diego, TX ZIP Codes & Directory
San Diego is an incorporated city in Duval County, Texas. Browse all active 5-digit USPS postal codes serving San Diego and surrounding Duval County delivery districts.
All ZIP Codes in San Diego, TX
1 CodesAbout San Diego Mail Delivery & Postal Administration
ZIP codes in San Diego are administered by the United States Postal Service. Delivery routes are coordinated through regional Sectional Center Facilities (SCFs) servicing Duval County and surrounding Texas metropolitan districts.
Frequently Asked Questions About San Diego, TX ZIP Codes
How many ZIP codes serve San Diego, Texas? ▾
San Diego, Texas is served by 1 active USPS postal delivery codes: 78131.
What county is San Diego located in? ▾
San Diego is an incorporated city located within Duval County, Texas.
What is the population and demographic size of San Diego? ▾
According to U.S. Census Bureau data, San Diego has an estimated population of 3,932 residents and is situated within the Duval Region.
How does mail sorting and delivery work in San Diego? ▾
Mail delivery in San Diego is operated by the United States Postal Service through regional Sectional Center Facility (SCF) distribution plants servicing Duval County and surrounding Texas counties.