Margaret Elizabeth Cousins, née Gillespie, also known as Gretta Cousins (7 October 1878–11 March 1954) was an Irish-Indian educationist, suffragist and Theosophist, who established All India Women's Conference (AIWC) in 1927. She was the wife of poet and literary critic James Cousins, with whom she moved to India in 1915. She is credited with composing the tune for the Indian National Anthem Jana Gana Mana in February 1919, during Rabindranath Tagore's visit to the Madanapalle College.