Margret Nissen (born Margarete Speer; 19 June 1938) is a German photographer.

She is a daughter of the German architect and high-ranked Nazi Party official Albert Speer (1905–1981).

On 14 April 1962, she married the archaeologist Hans Nissen, and she took his family name.

As a photographer of architecture, she has worked at the Berlin exhibition Topographie des Terrors.

She published a book about her father, Sind Sie die Tochter Speer?, in 2004.