| ZIP Code | 91310 |
| ZIP Code Name | Castaic |
| Primary County | Los Angeles County |
| ZIP Code Type | PO Box |
| Current Time | PDT |
91310 is a United States ZIP Code located in Castaic California. 91310 is entirely within Los Angeles County. 91310 is within Metro Los Angeles.
The current unemployment level in 91310 is 4.4%.| Coordinates | 34.43423080,-118.62826538 |
| Adjacent ZIP Codes | |
| Region | Metro Los Angeles |
| Metropolitan/Micropolitan Stat Area | Los Angeles-Long Beach-Anaheim, CA |
| Time Zone | Pacific Daylight Time |
| IANA Timezone | America/Los_Angeles |
| US Congressional Districts in 91310 | |
| California State Senate Districts in 91310 | |
| California State Assembly Districts in 91310 |
| School Districts in 91310 | |
| Elementary Schools in 91310 | |
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| High Schools in 91310 |