| Ort | Postleitzahl |
|---|---|
| Bałąg, Jonkowo | 11-042 |
| Gamerki Małe, Jonkowo | 11-042 |
| Gamerki Wielkie, Jonkowo | 11-042 |
| Garzewko, Jonkowo | 11-042 |
| Giedajty, Jonkowo | 11-042 |
| Godki, Jonkowo | 11-042 |
| Gutkowo, Jonkowo | 11-041 |
| Jonkowo, Jonkowo | 11-042 |
| Kajny, Jonkowo | 11-042 |
| Łomy, Jonkowo | 11-042 |
| Mątki, Jonkowo | 11-042 |
| Nowe Kawkowo, Jonkowo | 11-042 |
| Polejki, Jonkowo | 11-042 |
| Porbady, Jonkowo | 11-042 |
| Pupki, Jonkowo | 11-042 |
| Stare Kawkowo, Jonkowo | 11-042 |
| Stękiny, Jonkowo | 11-042 |
| Szałstry, Jonkowo | 11-042 |
| Szelągowo, Jonkowo | 11-041 |
| Warkały, Jonkowo | 11-041 |
| Węgajty, Jonkowo | 11-042 |
| Wilimowo, Jonkowo | 11-041 |
| Wołowno, Jonkowo | 11-042 |
| Wrzesina, Jonkowo | 11-042 |