| Locality | Post Code |
|---|---|
| Acosta, Somerset | 15520 |
| Addison, Somerset | 15411 |
| Berlin, Somerset | 15530 |
| Boswell, Somerset | 15531 |
| Boynton, Somerset | 15532 |
| Cairnbrook, Somerset | 15924 |
| Central City, Somerset | 15926 |
| Champion, Somerset | 15622 |
| Confluence, Somerset | 15424 |
| Davidsville, Somerset | 15928 |
| Fairhope, Somerset | 15538 |
| Fort Hill, Somerset | 15540 |
| Friedens, Somerset | 15541 |
| Garrett, Somerset | 15542 |
| Glencoe, Somerset | 15538 |
| Gray, Somerset | 15544 |
| Hidden Valley, Somerset | 15502 |
| Hollsopple, Somerset | 15935 |
| Hooversville, Somerset | 15936 |
| Hyndman, Somerset | 15545 |
| Jenners, Somerset | 15546 |
| Jennerstown, Somerset | 15547 |
| Jerome, Somerset | 15937 |
| Kantner, Somerset | 15548 |
| Listie, Somerset | 15549 |
| Listonburg, Somerset | 15424 |