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 7.020 39,3 km² Wiltz
Commune du La de la Haute-Sûre 1.987 48,5 km² Commune du La de la Haute-Sûre
Boulaide 1.306 32,1 km² Boulaide
Esch-sur-Sûre 2.784 50,6 km² Esch-sur-Sûre
Winseler 1.085 30,4 km² Winseler
Total 14.182 200,90 km2