Dessau-Roßlau is a kreisfreie Stadt in the German state of Saxony-Anhalt. It is situated at the confluence of the rivers Elbe and Mulde. The tow…Dessau-Roßlau is a kreisfreie Stadt in the German state of Saxony-Anhalt. It is situated at the confluence of the rivers Elbe and Mulde. The town was formed by merging the towns of Dessau and Roßlau as part of the 2007 regional boundary reform of Saxony-Anhalt. The reform involved a reduction in the number of rural districts in the state from 21 to 11, in anticipation of a continued population decline.