| Locality | Post Code |
|---|---|
| Aliquippa, Beaver | 15001 |
| Ambridge, Beaver | 15003 |
| Baden, Beaver | 15005 |
| Beaver, Beaver | 15009 |
| Beaver Falls, Beaver | 15010 |
| Clinton, Beaver | 15026 |
| Conway, Beaver | 15027 |
| Darlington, Beaver | 16115 |
| Ellwood City, Beaver | 16117 |
| Fair Oaks, Beaver | 15003 |
| Fombell, Beaver | 16123 |
| Freedom, Beaver | 15042 |
| Georgetown, Beaver | 15043 |
| Hookstown, Beaver | 15050 |
| Industry, Beaver | 15052 |
| Koppel, Beaver | 16136 |
| Mac Arthur, Beaver | 15001 |
| Midland, Beaver | 15059 |
| Monaca, Beaver | 15061 |
| New Brighton, Beaver | 15066 |
| New Galilee, Beaver | 16141 |
| Patterson Heights, Beaver | 15010 |
| Racine, Beaver | 15010 |
| Rochester, Beaver | 15074 |
| Shippingport, Beaver | 15077 |
| South Heights, Beaver | 15081 |