ZIP Code 91023 is located in Mount Wilson California. 91023 is entirely within Los Angeles County. Regionally, 91023 is located in Metro Los Angeles.
| ZIP Code Name | Mount Wilson |
| Primary County | Los Angeles County |
| ZIP Code Type | PO Box |
| Area Code(s) | 626 |
| Current Time | PST |
| Coordinates | 34.22641754,-118.06710815 |
| Region | Metro Los Angeles |
| Metropolitan/Micropolitan Stat Area | Los Angeles-Long Beach-Anaheim, CA |
| Time Zone | Pacific Standard Time |
| IANA Timezone | America/Los_Angeles |
| Area | 2 Square Miles |
| School Districts in 91023 | |
| High Schools in 91023 |