| Locality | Postal Code |
|---|---|
| Hollister, San Benito | 95023 |
| New Idria, San Benito | 95043 |
| Paicines, San Benito | 95043 |
| Panoche, San Benito | 95043 |
| Pinnacles, San Benito | 95043 |
| San Benito, San Benito | 95043 |
| San Juan Bautista, San Benito | 95045 |
| Tres Pinos, San Benito | 95075 |