San Dimas, CA ZIP Code
San Dimas, California has one ZIP code: .
Mail addressed to San Dimas covers nearby places too.
Where the 91773 ZIP code reaches
Tap or point to an area to see its ZIP code.Full-size map
Dashed line: San Dimas city limits.
Map: Census Bureau ZIP Code Tabulation Areas (2020) and place limits (2024).
Check an address in San Dimas
Street ranges from the Census Bureau, 2026. PO box and organization ZIP codes are not found by street. A new street may be missing: address not found?
San Dimas ZIP code questions
What is the main ZIP code for San Dimas?
91773, the ZIP code of the main San Dimas post office at 300 E Bonita Ave.
What county is San Dimas in?
Los Angeles County.
ZIP codes for towns near San Dimas
More towns near San Dimas: Montclair, West Covina, Diamond Bar, Upland, Baldwin Park, La Puente, Rowland Heights, Monrovia, Chino.
Sources and last checked
USPS ZIP Locale Detail (October 1, 2026), GeoNames (CC BY 4.0), U.S. Census Bureau, HUD-USPS crosswalk.
Checked October 20, 2026. Sources · How we build our lists · Corrections