| Place | Post Code |
|---|---|
| Boguszki, Wizna | 18-430 |
| Bronowo, Wizna | 18-430 |
| Janczewo, Wizna | 18-430 |
| Jarnuty, Wizna | 18-430 |
| Kokoszki, Wizna | 18-430 |
| Kolonia Łęg, Wizna | 18-430 |
| Kolonia Podkline, Wizna | 18-430 |
| Kolonia Podnarcie, Wizna | 18-430 |
| Kramkowo, Wizna | 18-430 |
| Lisno, Wizna | 18-430 |
| Lisno (Kolonia), Wizna | 18-430 |
| Małachowo, Wizna | 18-430 |
| Męczki, Wizna | 18-430 |
| Mrówki, Wizna | 18-430 |
| Nart, Wizna | 18-430 |
| Nieławice, Wizna | 18-430 |
| Niwkowo, Wizna | 18-430 |
| Nowe Bożejewo, Wizna | 18-430 |
| Podkosacze, Wizna | 18-430 |
| Ruś, Wizna | 18-430 |
| Rusiniec, Wizna | 18-430 |
| Rutki, Wizna | 18-430 |
| Rutkowskie, Wizna | 18-430 |
| Sambory, Wizna | 18-430 |
| Sieburczyn, Wizna | 18-430 |
| Srebrowo, Wizna | 18-430 |