Belmont, California Zip Codes
📍 Belmont is in San Mateo County, California with 2 zip codes; the most populous is 94002.
Belmont is a USPS city name in San Mateo County, California with a Census population of approximately 27,893 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 Belmont 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 Belmont Zip Codes
Belmont at a Glance
Belmont has 2 ZIP codes in this directory: 1 standard delivery ZIP and 1 PO Box or unique ZIP that carries no resident population in Census data. The 1 ZIP with published Census housing data cover 27,893 residents, the largest being 94002 with 27,893 people.
The median ZIP in Belmont has a household income of $184,929 and a home value of more than $2,000,000, a price-to-income ratio of at least 10.8, far above the 6.7 California ZIP median. Median rent across these ZIPs is $2,837 a month.
57% of households in the typical Belmont ZIP own their home (statewide ZIP median 64%). 68% of adults hold a bachelor's degree, far above the 31% statewide median. The median poverty rate is 6.9%, below the 10.8% statewide ZIP median. Overall density is about 4,981 residents per square mile across 6 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.
Belmont Zip Code Map
Interactive map of Belmont, California zip codes. Click any marker for details.