In 1885, Prussia dissolved the municipality of Neuhaus, while the area remained part of the Province of Hanover. However, in 1945 the area of the former municipality was annexed to Mecklenburg and thus became a part of the Soviet Occupation Zone due to lying on the right bank of the Elbe River, and thus along with the former County of Blankenburg and the municipality of Calvörde became one of a few small areas of the Province of Hanover (since 1946 Lower Saxony) that were part of East Germany from 1949 to 1990.