| Place | Post Code |
|---|---|
| Baranówka, Frombork | 14-530 |
| Baranówka-Leśniczówka, Frombork | 14-530 |
| Biedkowo, Frombork | 14-530 |
| Biedkowo-Osada, Frombork | 14-530 |
| Bogdany, Frombork | 14-530 |
| Drewnowo, Frombork | 14-530 |
| Frombork, Frombork | 14-530 |
| Jędrychowo, Frombork | 14-530 |
| Krzywiec, Frombork | 14-530 |
| Krzyżewo, Frombork | 14-530 |
| Narusa, Frombork | 14-530 |
| Niewiastowo, Frombork | 14-530 |
| Nowe Sadłuki, Frombork | 14-530 |
| Nowiny, Frombork | 14-530 |
| Ronin, Frombork | 14-530 |
| Wielkie Wierzno, Frombork | 14-530 |
| Wilanowo-Leśniczówka, Frombork | 14-530 |