Rancho Cucamonga, California ZIP Codes
- ZIP records
4 - Sum of listed ZIP population estimates
175,531 - Counties represented
1 - Population range
22,958–71,613 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 | 91730 | Rancho Cucamonga | San Bernardino | 71,613 |
| 2 | 91739 | Rancho Cucamonga | San Bernardino | 41,673 |
| 3 | 91701 | Rancho Cucamonga | San Bernardino | 39,287 |
| 4 | 91737 | Rancho Cucamonga | San Bernardino | 22,958 |
Counties represented
All ZIP Codes in Rancho Cucamonga
- ZIP 91701 — San Bernardino County
- ZIP 91730 — San Bernardino County
- ZIP 91737 — San Bernardino County
- ZIP 91739 — San Bernardino County
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.