Sophus Weidemann (31 December 1836 – 29 March 1894) was a Norwegian engineer and industrialist who contributed to the development of the shipping industry in Norway.
From 1864 he was manager of the workshop Fabrikken ved Nidelven in Trondheim, the later ship building company Trondhjems mekaniske Værksted.
He then opened his own engineering office and became a technical consultant for Trondheim based steamship company, Det Nordenfjeldske Dampskibsselskab until 1875.
[2] [3] Weidemann was elected to Trondheim City Council in 1883 In 1884, he bought Rosenborg farm together with lawyer Karl Ludvig Bugge.
The partners sold the parcel Bakkestranden to the municipality, while the rest of the area was divided up into residential plots and became the basis for the Trondheim neighborhood of Rosenborg.