| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Czerce, Sieniawa | 37-530 |
| Postal/ZIP Codes in Czerwona Wola, Sieniawa | 37-530 |
| Postal/ZIP Codes in Dobra, Sieniawa | 37-530 |
| Postal/ZIP Codes in Dybków, Sieniawa | 37-530 |
| Postal/ZIP Codes in Leżachów, Sieniawa | 37-530 |
| Postal/ZIP Codes in Paluchy, Sieniawa | 37-530 |
| Postal/ZIP Codes in Pigany, Sieniawa | 37-530 |
| Postal/ZIP Codes in Rudka, Sieniawa | 37-530 |
| Postal/ZIP Codes in Sieniawa, Sieniawa | 37-530 |
| Postal/ZIP Codes in Wylewa, Sieniawa | 37-530 |