Atherton, California Zip Codes
📍 Atherton is in San Mateo County, California with 1 zip code; the most populous is 94027.
Atherton is a USPS city name in San Mateo County, California with a Census population of approximately 7,142 across its ZIP codes. San Mateo County as a whole has 57 ZIP codes in this directory. Below you'll find every zip code serving Atherton 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 Atherton Zip Codes
Atherton at a Glance
Atherton has 1 ZIP code in this directory: 1 standard delivery ZIP. The 1 ZIP with published Census housing data cover 7,142 residents, the largest being 94027 with 7,142 people.
The median ZIP in Atherton has a household income of $250,001 and a home value of more than $2,000,000, a price-to-income ratio of at least 8.0, above the 6.7 California ZIP median. Median rent across these ZIPs is $3,501 a month.
86% of households in the typical Atherton ZIP own their home (statewide ZIP median 64%). 86% of adults hold a bachelor's degree, far above the 31% statewide median. The median poverty rate is 3.9%, far below the 10.8% statewide ZIP median. Overall density is about 1,428 residents per square mile across 5 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.
Atherton Zip Code Map
Interactive map of Atherton, California zip codes. Click any marker for details.