| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Radogoszcz, Osiek | 83-221 |
| Postal/ZIP Codes in Recice, Osiek | 83-221 |
| Postal/ZIP Codes in Skórzenno, Osiek | 83-221 |
| Postal/ZIP Codes in Skrzynia, Osiek | 83-221 |
| Postal/ZIP Codes in Suchobrzeźnica, Osiek | 83-221 |
| Postal/ZIP Codes in Szlaga-Młyn, Osiek | 83-221 |
| Postal/ZIP Codes in Trzebiechowo, Osiek | 83-221 |
| Postal/ZIP Codes in Udzierz, Osiek | 83-221 |
| Postal/ZIP Codes in Wierzbiny, Osiek | 83-221 |
| Postal/ZIP Codes in Wycinki, Osiek | 83-221 |
| Postal/ZIP Codes in Wymysłowo, Osiek | 83-221 |
| Postal/ZIP Codes in Zdrójki, Osiek | 83-221 |
| Postal/ZIP Codes in Żurawki, Osiek | 83-221 |