Loma Mar, California Zip Codes
📍 Loma Mar is in San Mateo County, California with 1 zip code; the most populous is 94021.
Loma Mar is a USPS city name in San Mateo County, California with a Census population of approximately 123 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 Loma Mar 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 Loma Mar Zip Codes
Loma Mar at a Glance
Loma Mar has 1 ZIP code in this directory: 1 standard delivery ZIP.
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.
Loma Mar Zip Code Map
Interactive map of Loma Mar, California zip codes. Click any marker for details.