Altona (German: [ˈaltonaː]), also called Hamburg-Altona, is the westernmost urban borough (Bezirk) of the German city state of Hamburg, on the right bank of the Elbe river. From 1640 to 1864, Altona was under the administration of the Danish monarchy. Altona was an independent borough until 1937. In 2016 the population was 270,263.