Zip Code 90603 — Whittier, CA
90603 is a ZIP Code associated with Whittier, CA, located within Los Angeles. 90603 ranks #216 out of 295 ZIP codes in Los Angeles County by population (and #797 out of 1,802 in CA). The area supports an estimated population of 21,118 residents across Data Pending housing units, with a population density of 2,577.5 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (33.944870, -117.992390)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 90603 |
| Primary City | Whittier |
| State / Province | CA |
| County | Los Angeles |
| Total Population | 21,118 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 2,577.5 people/sq mi |
| Timezone | America/Los_Angeles |
How 90603 Compares
| Metric | ZIP 90603 | Los Angeles County | CA State Average |
|---|
| Population | 21,118 | 9,807,501 (Total) | 39,286,245 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 2,577.5 /sq mi | -- | -- |
| County Pop Rank | #216 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 →