| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Annowo, Gruta | 86-330 |
| Postal/ZIP Codes in Boguszewo, Gruta | 86-330 |
| Postal/ZIP Codes in Cukrownia, Gruta | 86-330 |
| Postal/ZIP Codes in Dąbrówka Królewska, Gruta | 86-330 |
| Postal/ZIP Codes in Dąbrówka Pgr, Gruta | 86-330 |
| Postal/ZIP Codes in Gołębiewko, Gruta | 86-330 |
| Postal/ZIP Codes in Gruta, Gruta | 86-330 |
| Postal/ZIP Codes in Jasiewo, Gruta | 86-330 |
| Postal/ZIP Codes in Karasek, Gruta | 86-330 |
| Postal/ZIP Codes in Kitnowo, Gruta | 86-330 |
| Postal/ZIP Codes in Mełno, Gruta | 86-330 |
| Postal/ZIP Codes in Nicwałd, Gruta | 86-330 |
| Postal/ZIP Codes in Okonin, Gruta | 86-330 |
| Postal/ZIP Codes in Orle, Gruta | 86-330 |
| Postal/ZIP Codes in Plemięta, Gruta | 86-330 |
| Postal/ZIP Codes in Pokrzywno, Gruta | 86-330 |
| Postal/ZIP Codes in Salno, Gruta | 86-330 |
| Postal/ZIP Codes in Słup, Gruta | 86-330 |
| Postal/ZIP Codes in Słupski Młyn, Gruta | 86-320 |
| Postal/ZIP Codes in Wiktorowo, Gruta | 86-330 |