| Place | Post Code |
|---|---|
| Bachury, Michałowo | 16-050 |
| Bagniuki, Michałowo | 16-050 |
| Barszczewo, Michałowo | 16-050 |
| Bieńdziuga, Michałowo | 16-050 |
| Bondary, Michałowo | 16-050 |
| Brzezina, Michałowo | 16-050 |
| Budy, Michałowo | 16-050 |
| Cisówka, Michałowo | 16-050 |
| Ciwoniuki, Michałowo | 16-050 |
| Dublany, Michałowo | 16-050 |
| Garbary, Michałowo | 16-050 |
| Gonczary, Michałowo | 16-050 |
| Gorbacze, Michałowo | 16-050 |
| Hieronimowo, Michałowo | 16-050 |
| Hoźna, Michałowo | 17-210 |
| Jałówka, Michałowo | 16-050 |
| Julianka, Michałowo | 16-050 |
| Juszkowy Gród, Michałowo | 16-050 |
| Kalitnik, Michałowo | 16-050 |
| Kamienny Bród, Michałowo | 16-050 |
| Kazimierowo, Michałowo | 16-050 |
| Kituryki, Michałowo | 16-050 |
| Kobylanka, Michałowo | 16-050 |
| Koleśne, Michałowo | 16-050 |
| Kondratki, Michałowo | 16-050 |
| Kopce, Michałowo | 16-050 |