Plettenberg is a town in the Märkischer Kreis, in North Rhine-Westphalia, Germany. Plettenberg is located to the west of the Sauerland hills. T…Plettenberg is a town in the Märkischer Kreis, in North Rhine-Westphalia, Germany. Plettenberg is located to the west of the Sauerland hills. The highest elevation of the town area is in the Ebbe Mountains with 663 m above sea level, the lowest elevation with 194 m near Teindeln. The town is spread out between the four valleys of the rivers Lenne, Else, Oester and Grüne.