| Localité | Code postal |
|---|---|
| Bellingwolde, Westerwolde | 9695 |
| Blijham, Westerwolde | 9697 |
| Bourtange, Westerwolde | 9545 |
| Oudeschans, Westerwolde | 9696 |
| Sellingen, Westerwolde | 9551 |
| Ter Apel, Westerwolde | 9561 |
| Ter Apelkanaal, Westerwolde | 9563 |
| Veelerveen, Westerwolde | 9566 |
| Vlagtwedde, Westerwolde | 9541 |
| Vriescheloo, Westerwolde | 9699 |
| Wedde, Westerwolde | 9698 |
| Codes postaux en Groningen | |
|---|---|
| Westerwolde | Westerkwartier |
| Veendam | Stadskanaal |
| Pekela | Oldambt |
| Midden-Groningen | Loppersum |
| Het Hogeland | Groningen |
| Delfzijl | Appingedam |