| ZIP Code | 91001 |
| City | Altadena |
| State | California (CA) |
| County | Los Angeles |
| Timezone | America/Los_Angeles |
| Coordinates | 34.1952200, -118.1386600 |
| Population | 35,475 |
| ZIP Type | STANDARD |
| Country | United States |
91001 is a mid-sized ZIP code covering Altadena in California, the United States. This area falls under Los Angeles County.
Altadena has a reported population of 35,475. This puts it well ahead of the typical ZIP code in California (roughly 22,296).
Population density runs around 1,658 people per sq. mile, making it a suburban area.
Other ZIP code codes in California serve areas such as Fontana, Pittsburg, Los Angeles.
The ZIP code for Altadena, California is 91001.
91001 is located in Los Angeles County, California.
The population of 91001 (Altadena) is approximately 35,475 people.
91001 is more populated than the typical California ZIP code, which averages around 22,296 people.
ZIP code codes near 91001 include 92336, 94565, 90011.