Clayton, CA Area Codes
Clayton is served by area code 925. It is in California, Contra Costa County. About 12,316 people live in its 1 ZIP codes.
| Field | Value |
|---|---|
| Area code(s) | 925 |
| State / province | California |
| County | Contra Costa County |
| Population | 12,316 |
| ZIP codes | 1 |
| Time zone | Pacific |
| Coordinates | 37.8911, -121.8931 |
What area code is Clayton in?
| Area code | Main state | Population covered | Overlap |
|---|---|---|---|
| 925 | California | 1,128,993 | — |
ZIP codes in the code footprint
Nearby towns and their area codes
How to dial
Dial 925 + 7 digits for a number in Clayton, or +1 925 ... from abroad. Ten-digit dialling is required everywhere in the North American Numbering Plan.