Martinez, California Zip Codes
📍 Martinez is in Contra Costa County, California with 1 zip code; the most populous is 94553.
Martinez is a USPS city name in Contra Costa County, California with a Census population of approximately 49,062 across its ZIP codes. Contra Costa County as a whole has 53 ZIP codes in this directory. Below you'll find every zip code serving Martinez with population, income and home value, a map, and the city's affordability profile.
Population and demographic data sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code routing data sourced from the United States Postal Service (USPS).
All Martinez Zip Codes
Martinez at a Glance
Martinez has 1 ZIP code in this directory: 1 standard delivery ZIP. The 1 ZIP with published Census housing data cover 49,062 residents, the largest being 94553 with 49,062 people.
The median ZIP in Martinez has a household income of $118,704 and a home value of $723,400, a price-to-income ratio of 6.1, below the 6.7 California ZIP median. Median rent across these ZIPs is $2,170 a month.
72% of households in the typical Martinez ZIP own their home (statewide ZIP median 64%). 42% of adults hold a bachelor's degree, above the 31% statewide median. The median poverty rate is 6.4%, below the 10.8% statewide ZIP median. Overall density is about 796 residents per square mile across 62 square miles of ZIP land area.
Medians are taken across the ZIP codes listed below (each ZIP weighted equally); PO Box and no-data ZIPs are excluded. Definitions on the methodology page; statewide comparisons in the 2026 California ZIP Code Affordability Report.
Martinez Zip Code Map
Interactive map of Martinez, California zip codes. Click any marker for details.