Martinez, CA ZIP Code
Martinez, California has one ZIP code: .
Mail addressed to Martinez covers nearby places too.
Where the 94553 ZIP code reaches
Tap or point to an area to see its ZIP code.Full-size map
Dashed line: Martinez city limits.
Map: Census Bureau ZIP Code Tabulation Areas (2020) and place limits (2024).
Check an address in Martinez
Street ranges from the Census Bureau, 2026. PO box and organization ZIP codes are not found by street. A new street may be missing: address not found?
Why your mail may say Martinez when you live outside it
Martinez ZIP codes also cover Pacheco, Vine Hill and Alhambra Valley, so a letter addressed to Martinez can go to a home outside the city limits.
A ZIP code does not set your city, school district or tax. Contra Costa County property records show which city you are in.
Martinez ZIP code questions
What is the main ZIP code for Martinez?
94553, the ZIP code of the main Court post office at 815 Court St.
What county is Martinez in?
Contra Costa County.
ZIP codes for towns near Martinez
More towns near Martinez: Berkeley, Richmond, Danville, Oakland, Antioch, Fairfield, San Ramon, Alameda, Castro Valley.
Sources and last checked
USPS ZIP Locale Detail (October 1, 2026), GeoNames (CC BY 4.0), U.S. Census Bureau, HUD-USPS crosswalk.
Checked October 20, 2026. Sources · How we build our lists · Corrections