Ontario ZIP Codes

List of Zip Codes of Ontario

The following table lists ZIP Codes associated with Ontario, California, based on ZIP Code Tabulation Area (ZCTA) data from the U.S. Census Bureau.


S.N. Zip Code Latitude Longitude County Population Density
1 91761 34.03541 -117.5915 San Bernardino 62,506 847.0
2 91762 34.02764 -117.64308 San Bernardino 63,656 1720.0
3 91764 34.07533 -117.60164 San Bernardino 55,412 2705.9


About Ontario California Zip Codes

The city of Ontario in California (CA) is served by approximately 3 ZIP Codes. These codes cover residential neighborhoods, business districts, and surrounding localities that use the city name in their mailing address.

Based on ZIP-level population estimates, the combined population covered by these ZIP Codes is around 181,574 people. Population density can vary significantly from one ZIP Code to another, reflecting the mix of dense urban blocks, commercial corridors, and lower-density residential areas.

The ZIP Codes associated with Ontario fall within county jurisdictions such as San Bernardino. Each county manages local services, land use, and administration for the areas corresponding to its ZIP Codes.

Most ZIP codes for Ontario, California follow the America/Los_Angeles time zone.