The Öewersauer Nature Park currently consists of 5 municipalities: Boulaide, Esch-sur-Sûre, Commune du Lac de la Haute-Sûre, Wiltz and Winseler.
Since January 2020 the Nature Park has been working very closely with the municipality of Goesdorf with a view to joining the Nature Park at a later date.
| Municipality | Population | Surface | Link |
|---|---|---|---|
| Wiltz | 7621 | 39,3 km² | Wiltz |
| Commune du La de la Haute-Sûre | 2082 | 48,50 km² | Commune du La de la Haute-Sûre |
| Boulaide | 1384 | 32,13 km² | Boulaide |
| Esch-sur-Sûre | 3004 | 50,59 km² | Esch-sur-Sûre |
| Winseler | 1361 | 30,42 km² | Winseler |
| Total | 15.452 | 200,94 km2 | |