For other people named Mary Reid, see Mary Greyeyes.
Mary Reid aka Mary Reid MacArthur (1880-1921) was a Scottish suffragette and trades unionist. She was born in Glasgow and became politicised when she joined the shop assistant's union whilst working in her father's drapers shop. In 1903 she became the general secretary of the Women's Trade Union League and in 1906 formed the National Federation of Women Workers and assisted in the creation of the National Anti-Sweating League. In 1909 Mary led the women chain makers of Cradley Heath to victory in their fight for a minimum wage and led a strike to force employers to implement the rise.