Zip Code 91784 — Upland, CA
91784 is a ZIP Code associated with Upland, CA, located within San Bernardino. The postal region supports an estimated population of 26,886 residents across Data Pending housing units, with a population density of 1,135.7 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (34.141030, -117.658310)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 91784 |
| Primary City | Upland |
| State / Province | CA |
| County | San Bernardino |
| Total Population | 26,886 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 1,135.7 people/sq mi |
| Timezone | America/Los_Angeles |
How 91784 Compares
| Metric | ZIP 91784 | San Bernardino County | CA State Average |
|---|
| Population | 26,886 | 2,188,912 | 39,286,245 |
| Median Income | Data Pending | N/A | N/A |
| Population Density | 1,135.7 /sq mi | -- | -- |
Nearby ZIP Codes
| ZIP Code | City | Distance | Population | Median Income |
|---|
| Zip 91786 | Upland | 2.5 mi | 55,829 | N/A |
| Zip 91701 | Rancho Cucamonga | 3.3 mi | 39,287 | N/A |
| Zip 91711 | Claremont | 3.4 mi | 37,529 | N/A |
| Zip 91737 | Rancho Cucamonga | 4.7 mi | 22,958 | N/A |
| Zip 91730 | Rancho Cucamonga | 5.2 mi | 71,613 | 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 →