Emily Mary Bibbens Warren (1869 – 1956) was a British Canadian artist and illustrator.
Emily Warren instigated a successful movement to have John Ruskin's home, Brantwood, made into a museum.
In 1921 she was commissioned by Sir Robert Borden to come to Canada to complete two large canvasses 6'6" × 11'6", oil painting entitled Canada's Tribute, The Great War 1914–1919 and Placing the Canadian Colours on Wolfe's Monument in Westminster Abbey.
She gave lectures in Canada in the 1920s and 1930s illustrated by 1900 handcoloured glass slides reproducing her own paintings.
Half of the 1900 slides are in the Thomas Fisher Rare Book Library, University of Toronto, along with an extensive collection of correspondence, lecture notes, and biographical material.
Two boxes of slides of drawings of individual generals' faces and of flags, preliminary drawings for her paintings, Canada's Tribute and Placing the Canadian Colours on Wolfe's Monument in Westminster Abbey, are in the Canadian War Museum, Ottawa.