San Gregorio, California Zip Codes
📍 San Gregorio is in San Mateo County, California with 1 zip code; the most populous is 94074.
San Gregorio is a USPS city name in San Mateo County, California with a Census population of approximately 151 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 San Gregorio 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 San Gregorio Zip Codes
San Gregorio at a Glance
San Gregorio has 1 ZIP code in this directory: 1 standard delivery ZIP. The 1 ZIP with published Census housing data cover 151 residents, the largest being 94074 with 151 people.
The median ZIP in San Gregorio has a household income of $143,203 and a home value of $1,039,100, a price-to-income ratio of 7.3, above the 6.7 California ZIP median.
79% of households in the typical San Gregorio ZIP own their home (statewide ZIP median 64%). 19% of adults hold a bachelor's degree, below the 31% statewide median. Overall density is about 7 residents per square mile across 23 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.
San Gregorio Zip Code Map
Interactive map of San Gregorio, California zip codes. Click any marker for details.