Marion Coates Hansen, born Marion Coates (c.1870 – 2 January 1947), was a feminist and women's suffrage campaigner, an early member of the militant Women's Social and Political Union (WSPU) and a founder member of the Women's Freedom League (WFL) in 1907. She is generally credited with having influenced George Lansbury, the Labour politician and future party leader, to take up the cause of votes for women when she acted as his agent in the general election campaign of 1906.