Rosslau was until 30 June 2007 a town in Saxony-Anhalt, Germany, belonging to the district Anhalt-Zerbst. After a fusion with the town of Dessau it became eponym of the newly founded town of Dessau-Roßlau and a quarter of it. Rosslau is situated on the right bank of the Elbe, here crossed by two railway bridges, 3 mi. by rail N. of Dessau and 35 mi. S.E. of Magdeburg.