199?-200?[]
200?-present[]
On 1 January 2019, the municipalities of Haren, and Ten Boer were merged into Groningen.
Eemsdelta | Groningen | Het Hogeland | Midden-Groningen | Oldambt | Pekela | Stadskanaal | Veendam | Westerkwartier | Westerwolde
Former: (2000–2021) |