Clayton, California Zip Codes
📍 Clayton is in Contra Costa County, California with 1 zip code; the most populous is 94517.
Clayton is a USPS city name in Contra Costa County, California with a Census population of approximately 12,349 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 Clayton 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 Clayton Zip Codes
Clayton at a Glance
Clayton has 1 ZIP code in this directory: 1 standard delivery ZIP. The 1 ZIP with published Census housing data cover 12,349 residents, the largest being 94517 with 12,349 people.
The median ZIP in Clayton has a household income of $156,870 and a home value of $911,500, a price-to-income ratio of 5.8, below the 6.7 California ZIP median. Median rent across these ZIPs is $3,501 a month.
92% of households in the typical Clayton ZIP own their home (statewide ZIP median 64%). 57% of adults hold a bachelor's degree, far above the 31% statewide median. The median poverty rate is 3.0%, far below the 10.8% statewide ZIP median. Overall density is about 259 residents per square mile across 48 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.
Clayton Zip Code Map
Interactive map of Clayton, California zip codes. Click any marker for details.