Margret Nissen (born 19 June 1938 as Margarete Speer) is a Germanphotographer. She is the daughter of the German architect, a senior Nazi official Albert Speer (1905-1981).
Nissen was named after her mother. She lived in Obersalzberg until the end of the war. After the imprisonment of her father, the family moved to Heidelberg. She studied archaeology at the university in Heidelberg. On 14 April 1962 she married the archaeologist Hans Nissen and they lived a couple of years in Baghdad. Nissen set out to become a mainly self-taught photographer. Since 1980 her work has primarily been shown at exhibitions in Berlin. As a photographer of architecture, she has worked at the Berlin exhibition "Topographie des Terrors".