Henrietta Mabel May (September 11, 1877 – October 8, 1971) was a Canadian artist in the early 20th century and an organizer of women artists.
Based in Quebec early in her career, and later in Vancouver, she was a well-known painter and member of multiple important Canadian artist groups, including the Art Association of Montreal, the Beaver Hall Group and the Canadian Group of Painters.
Her works have been displayed at the Canadian War Memorial, National Gallery, the Vancouver Art Gallery and many smaller galleries throughout Quebec.
She has been commonly referred to as the "Emily Carr of Montreal" due to her interest in landscape and nature.
Her art was influenced by her avid interest in French Impressionism.