Zip Code 91739 — Rancho Cucamonga, CA
91739 is a ZIP Code associated with Rancho Cucamonga, CA, located within San Bernardino. The postal region supports an estimated population of 41,673 residents across Data Pending housing units, with a population density of 566.1 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (34.162200, -117.515580)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 91739 |
| Primary City | Rancho Cucamonga |
| State / Province | CA |
| County | San Bernardino |
| Total Population | 41,673 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 566.1 people/sq mi |
| Timezone | America/Los_Angeles |
How 91739 Compares
| Metric | ZIP 91739 | San Bernardino County | CA State Average |
|---|
| Population | 41,673 | 2,188,912 | 39,286,245 |
| Median Income | Data Pending | N/A | N/A |
| Population Density | 566.1 /sq mi | -- | -- |
Nearby ZIP Codes
| ZIP Code | City | Distance | Population | Median Income |
|---|
| Zip 91737 | Rancho Cucamonga | 3.6 mi | 22,958 | N/A |
| Zip 92336 | Fontana | 3.6 mi | 105,517 | N/A |
| Zip 91701 | Rancho Cucamonga | 5.1 mi | 39,287 | N/A |
| Zip 91730 | Rancho Cucamonga | 5.7 mi | 71,613 | N/A |
| Zip 92335 | Fontana | 5.9 mi | 97,511 | N/A |
Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →