San Marcos, CA ZIP Codes & Directory
San Marcos is located in San Diego County in California. Browse all active 5-digit USPS ZIP codes serving San Marcos and surrounding San Diego County delivery districts.
All ZIP Codes in San Marcos, CA
2 CodesAbout San Marcos Mail Delivery & Postal Administration
ZIP codes in San Marcos are administered by the United States Postal Service. Delivery routes are coordinated through regional Sectional Center Facilities (SCFs) servicing San Diego County and surrounding California metropolitan districts.
Frequently Asked Questions About San Marcos, CA ZIP Codes
How many ZIP codes serve San Marcos, California? ▾
San Marcos, California is served by 2 active USPS postal delivery codes: 92069, 92078.
What county is San Marcos located in? ▾
San Marcos is an incorporated city located within San Diego County, California.
What is the population and demographic size of San Marcos? ▾
According to official U.S. Census Bureau data, San Marcos has an estimated population of 101,754 residents and is situated within the undefined.
How does mail sorting and delivery work in San Marcos? ▾
Mail delivery in San Marcos is operated by the United States Postal Service (USPS) through regional Sectional Center Facility (SCF) distribution plants servicing San Diego County and surrounding California counties.
How much does it cost to ship a package to San Marcos, CA? ▾
Shipping costs to San Marcos 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 Marcos? ▾
Standard USPS Ground Advantage typically takes 2-5 business days to reach San Marcos, depending on the origin. Priority Mail generally arrives in 1-3 business days. Please check tracking for specific regional routing times.