Ontario, California ZIP Codes
- ZIP records
3 - Sum of listed ZIP population estimates
183,440 - Counties represented
1 - Population range
56,270–64,235 per ZIP
Population sum includes positive estimates in these ZIP records; it is not an official city population.
Top ZIP Codes by Population
| Rank | ZIP Code | City | County | Population estimate |
|---|---|---|---|---|
| 1 | 91762 | Ontario | San Bernardino | 64,235 |
| 2 | 91761 | Ontario | San Bernardino | 62,935 |
| 3 | 91764 | Ontario | San Bernardino | 56,270 |
Counties represented
All ZIP Codes in Ontario
Browse all ZIP data for California
Methodology: ZIP records are grouped by the source file's primary city and state fields. Population ranges and sums use positive ZIP-level estimates; sums should not be read as official city totals. County links use each record's listed county assignment.