Zip Code 91770 — Rosemead, CA
91770 is a ZIP Code associated with Rosemead, CA, located within Los Angeles. 91770 ranks #32 out of 295 ZIP codes in Los Angeles County by population (and #136 out of 1,802 in CA). The area supports an estimated population of 58,382 residents across Data Pending housing units, with a population density of 3,455.0 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (34.063950, -118.083610)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 91770 |
| Primary City | Rosemead |
| State / Province | CA |
| County | Los Angeles |
| Total Population | 58,382 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 3,455.0 people/sq mi |
| Timezone | America/Los_Angeles |
How 91770 Compares
| Metric | ZIP 91770 | Los Angeles County | CA State Average |
|---|
| Population | 58,382 | 9,807,501 (Total) | 39,286,245 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 3,455.0 /sq mi | -- | -- |
| County Pop Rank | #32 of 295 | -- | -- |
Nearby ZIP Codes
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 →