| Locality | Post Code |
|---|---|
| Sadsburyville, Chester | 19369 |
| Saint Peters, Chester | 19470 |
| Southeastern, Chester | 19399 |
| Spring City, Chester | 19475 |
| Steelville, Chester | 19310 |
| Strafford, Chester | 19087 |
| Suplee, Chester | 19371 |
| Thorndale, Chester | 19372 |
| Toughkenamon, Chester | 19374 |
| Tredyffrin, Chester | 19312 |
| Unionville, Chester | 19375 |
| Uwchland, Chester | 19480 |
| Valley, Chester | 19320 |
| Valley Forge, Chester | 19481 |
| Wagontown, Chester | 19376 |
| West Bradford, Chester | 19320, 19335, 19380 |
| West Brandywine, Chester | 19320 |
| West Chester, Chester | 19380, 19382, 19383 |
| West Grove, Chester | 19390 |
| Westtown, Chester | 19395 |