| Post Office | Johnstown |
| Division | Cambria |
| Pincode | 15905 |
| Post Office | Johnstown |
| Division | Cambria |
| Pincode | 15904 |
| Post Office | Johnstown |
| Division | Cambria |
| Pincode | 15902 |
| Post Office | Johnstown |
| Division | Cambria |
| Pincode | 15906 |
| Post Office | Johnstown |
| Division | Cambria |
| Pincode | 15909 |
| Post Office | Johnstown |
| Division | Cambria |
| Pincode | 15901 |