Zip Code | City | Population |
|---|---|---|
| 15001 | Aliquippa | 32,237 |
| 15010 | Beaver Falls | 28,523 |
| 15009 | Beaver | 15,722 |
| 15061 | Monaca | 12,393 |
| 15066 | New Brighton | 12,362 |
| 15003 | Ambridge | 11,406 |
| 15005 | Baden | 9,480 |
| 15074 | Rochester | 8,501 |
| 15042 | Freedom | 7,759 |
| 15059 | Midland | 4,248 |
| 15026 | Clinton | 3,910 |
| 16115 | Darlington | 3,501 |
| 15052 | Industry | 3,024 |
| 16123 | Fombell | 2,681 |
| 15050 | Hookstown | 2,476 |
| 15027 | Conway | 2,219 |
| 15043 | Georgetown | 2,209 |
| 16136 | Koppel | 775 |
| 15081 | South Heights | 325 |
| 15077 | Shippingport | 219 |