Does anyone know where Oberdollendorf is. I know it is in Obercassel Kreis which is near Bonn but I cannot find it. A. Shoemaker Oberdollendorf is located between Bonn and Königswinter and is incorporated to Königswinter, right side of river Rhine. Oberkassel belongs to the city of Bonn and there is no Kreis Oberkassel. Caspers