San Mateo, CA ZIP Codes & Directory
San Mateo is located in San Mateo County in California. Browse all active 5-digit USPS ZIP codes serving San Mateo and surrounding San Mateo County delivery districts.
All ZIP Codes in San Mateo, CA
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About San Mateo Mail Delivery & Postal Administration
ZIP codes in San Mateo are administered by the United States Postal Service. Delivery routes are coordinated through regional Sectional Center Facilities (SCFs) servicing San Mateo County and surrounding California metropolitan districts.
Frequently Asked Questions About San Mateo, CA ZIP Codes
How many ZIP codes serve San Mateo, California? ▾
San Mateo, California is served by 4 active USPS postal delivery codes: 94401, 94402, 94403, 94404.
What county is San Mateo located in? ▾
San Mateo is an incorporated city located within San Mateo County, California.
What is the population and demographic size of San Mateo? ▾
According to official U.S. Census Bureau data, San Mateo has an estimated population of 143,508 residents and is situated within the undefined.
How does mail sorting and delivery work in San Mateo? ▾
Mail delivery in San Mateo is operated by the United States Postal Service (USPS) through regional Sectional Center Facility (SCF) distribution plants servicing San Mateo County and surrounding California counties.
How much does it cost to ship a package to San Mateo, CA? ▾
Shipping costs to San Mateo 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 Mateo? ▾
Standard USPS Ground Advantage typically takes 2-5 business days to reach San Mateo, depending on the origin. Priority Mail generally arrives in 1-3 business days. Please check tracking for specific regional routing times.