| Locality | Post Code |
|---|---|
| Bad Nieuweschans, Oldambt | 9693 |
| Beerta, Oldambt | 9686 |
| Blauwestad, Oldambt | 9685 |
| Drieborg, Oldambt | 9688 |
| Finsterwolde, Oldambt | 9684 |
| Heiligerlee, Oldambt | 9677 |
| Midwolda, Oldambt | 9681 |
| Nieuw Beerta, Oldambt | 9687 |
| Nieuw Scheemda, Oldambt | 9943 |
| Nieuwolda, Oldambt | 9944 |
| Oostwold, Oldambt | 9682 |
| Oudezijl, Oldambt | 9691 PB, 9691 PC |
| Scheemda, Oldambt | 9679 |
| 't Waar, Oldambt | 9942 |
| Westerlee, Oldambt | 9678 |
| Winschoten, Oldambt | 9671, 9672, 9673, 9674, 9675 |
| Groningen Postal Codes | |
|---|---|
| Westerwolde | Westerkwartier |
| Veendam | Stadskanaal |
| Pekela | Oldambt |
| Midden-Groningen | Loppersum |
| Het Hogeland | Groningen |
| Delfzijl | Appingedam |