| Place | Post Code |
|---|---|
| Chobotki, Knyszyn | 19-120 |
| Cisówka, Knyszyn | 19-120 |
| Czechowizna, Knyszyn | 19-120 |
| Grądy, Knyszyn | 19-120 |
| Guzy, Knyszyn | 19-120 |
| Jaskra, Knyszyn | 19-120 |
| Kalinówka Kościelna, Knyszyn | 19-120 |
| Knyszyn, Knyszyn | 19-120 |
| Knyszyn-Zamek, Knyszyn | 19-120 |
| Nowiny Kasjerskie, Knyszyn | 19-120 |
| Nowiny-Zdroje, Knyszyn | 19-120 |
| Ogrodniki, Knyszyn | 19-120 |
| Poniklica, Knyszyn | 19-120 |
| Wodziłówka, Knyszyn | 19-120 |
| Wojtówce, Knyszyn | 19-120 |
| Zofiówka, Knyszyn | 19-120 |
| All postal codes in Moniecki | |
|---|---|
| Goniądz, Moniecki | |
| Jasionówka, Moniecki | |
| Jaświły, Moniecki | |
| Knyszyn, Moniecki | |
| Krypno, Moniecki | |
| Mońki, Moniecki | |
| Trzcianne, Moniecki | |