Marga Petersen (pronounced as /de/; 18 September 1919 in Bremen – 22 September 2002 in Ottersberg) was a German athlete who competed mainly in the sprints.
She competed for West Germany in the 1952 Summer Olympics held in Helsinki, Finland in the 4 × 100 metres where she won the silver medal with her teammates Ursula Knab, 80 metre hurdles bronze medalist Maria Sander and Helga Klein.[1]