| Ort | Postleitzahl |
|---|---|
| Bęsia, Kolno | 11-311 |
| Górkowo, Kolno | 11-311 |
| Górowo, Kolno | 11-311 |
| Kabiny, Kolno | 11-311 |
| Kolno, Kolno | 11-311 |
| Kominki, Kolno | 11-311 |
| Kruzy, Kolno | 11-311 |
| Lutry, Kolno | 11-311 |
| Oterki, Kolno | 11-311 |
| Otry, Kolno | 11-311 |
| Ryn Reszelski, Kolno | 11-311 |
| Samławki, Kolno | 11-311 |
| Tarniny, Kolno | 11-230 |
| Tejstymy, Kolno | 11-311 |
| Wągsty, Kolno | 11-311 |
| Wójtowo, Kolno | 11-311 |
| Wólka, Kolno | 11-311 |
| Wysoka Dąbrowa, Kolno | 11-311 |