Martinez, CA ZIP Codes & Directory
Martinez is located in Contra Costa County in California. Browse all active 5-digit USPS ZIP codes serving Martinez and surrounding Contra Costa County delivery districts.
All ZIP Codes in Martinez, CA
1 CodesAbout Martinez Mail Delivery & Postal Administration
ZIP codes in Martinez are administered by the United States Postal Service. Delivery routes are coordinated through regional Sectional Center Facilities (SCFs) servicing Contra Costa County and surrounding California metropolitan districts.
Frequently Asked Questions About Martinez, CA ZIP Codes
How many ZIP codes serve Martinez, California? ▾
Martinez, California is served by 1 active USPS postal delivery codes: 94553.
What county is Martinez located in? ▾
Martinez is an incorporated city located within Contra Costa County, California.
What is the population and demographic size of Martinez? ▾
According to official U.S. Census Bureau data, Martinez has an estimated population of 49,756 residents and is situated within the undefined.
How does mail sorting and delivery work in Martinez? ▾
Mail delivery in Martinez is operated by the United States Postal Service (USPS) through regional Sectional Center Facility (SCF) distribution plants servicing Contra Costa County and surrounding California counties.
How much does it cost to ship a package to Martinez, CA? ▾
Shipping costs to Martinez 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 Martinez? ▾
Standard USPS Ground Advantage typically takes 2-5 business days to reach Martinez, depending on the origin. Priority Mail generally arrives in 1-3 business days. Please check tracking for specific regional routing times.