| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Bęsia, Kolno | 11-311 |
| Postal/ZIP Codes in Górkowo, Kolno | 11-311 |
| Postal/ZIP Codes in Górowo, Kolno | 11-311 |
| Postal/ZIP Codes in Kabiny, Kolno | 11-311 |
| Postal/ZIP Codes in Kolno, Kolno | 11-311 |
| Postal/ZIP Codes in Kominki, Kolno | 11-311 |
| Postal/ZIP Codes in Kruzy, Kolno | 11-311 |
| Postal/ZIP Codes in Lutry, Kolno | 11-311 |
| Postal/ZIP Codes in Oterki, Kolno | 11-311 |
| Postal/ZIP Codes in Otry, Kolno | 11-311 |
| Postal/ZIP Codes in Ryn Reszelski, Kolno | 11-311 |
| Postal/ZIP Codes in Samławki, Kolno | 11-311 |
| Postal/ZIP Codes in Tarniny, Kolno | 11-230 |
| Postal/ZIP Codes in Tejstymy, Kolno | 11-311 |
| Postal/ZIP Codes in Wągsty, Kolno | 11-311 |
| Postal/ZIP Codes in Wójtowo, Kolno | 11-311 |
| Postal/ZIP Codes in Wólka, Kolno | 11-311 |
| Postal/ZIP Codes in Wysoka Dąbrowa, Kolno | 11-311 |