Margaret Jean Roberts Legum (8 October 1933, Pretoria, South Africa – 1 November 2007, Cape Town, South Africa) was a South African/British anti-apartheid activist and social reformer, who specialized in economics. Legum attended Rhodes University and Newnham College where she studied economics. Legum married Colin Legum in 1960 and they moved to London. Margaret Legum died in 2007, aged 74, from cancer, survived by her three daughters and grandchildren.