Mary Evelyn Greig Buchanan (b.1886) was a teacher, and a missionary to China and India. She was born in Levis, Quebec, and taught public school in Montreal and Lethbridge for thirteen years. She also spent seven years teaching primary school in Canton, China, arriving in 1922. She was appointed to Honan, China, by the Board of Foreign Missions in 1934 to teach school. She also served in India from 1946, returning to Canada in 1951.