| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Stary Nakwasin, Koźminek | 62-840 |
| Postal/ZIP Codes in Tymianek, Koźminek | 62-840 |
| Postal/ZIP Codes in Warwarówka, Koźminek | 62-840 |
| Postal/ZIP Codes in Złotniki, Koźminek | 62-840 |
| Postal/ZIP Codes in Zosina, Koźminek | 62-840 |