| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Adamierz, Olesno | 33-210 |
| Postal/ZIP Codes in Breń, Olesno | 33-210 |
| Postal/ZIP Codes in Ćwików, Olesno | 33-264 |
| Postal/ZIP Codes in Dąbrówka Gorzycka, Olesno | 33-210 |
| Postal/ZIP Codes in Dąbrówki Breńskie, Olesno | 33-210 |
| Postal/ZIP Codes in Niwki, Olesno | 33-264 |
| Postal/ZIP Codes in Oleśnica, Olesno | 33-200 |
| Postal/ZIP Codes in Olesno, Olesno | 33-210 |
| Postal/ZIP Codes in Pilcza Żelichowska, Olesno | 33-264 |
| Postal/ZIP Codes in Podborze, Olesno | 33-210 |
| Postal/ZIP Codes in Swarzów, Olesno | 33-210 |
| Postal/ZIP Codes in Wielopole, Olesno | 33-210 |
| Postal/ZIP Codes in Zalipie, Olesno | 33-263 |