Orth an der Donau is a town in the district of Gänserndorf in the Austrian state of Lower Austria. It is located on the bank of the Danube River, …Orth an der Donau is a town in the district of Gänserndorf in the Austrian state of Lower Austria. It is located on the bank of the Danube River, about 15 miles east of Vienna and 17 miles west of Bratislava.