Ethel Sargant FLS (28 October 1863 – 16 January 1918) was a British botanist who studied both the cytology and morphology of plants.

[2] She worked with Margaret Jane Benson, head of the Department of Botany at Royal Holloway College, and travelled with her throughout Europe in 1897 to acquire equipment and knowledge to set up that school's laboratory.

[3] From 1892 to 1893, she worked with Professor D.H. Scott at the Jodrell Laboratory in Kew Gardens, where she investigated the nucleus and the development of the male and female gametes in Lilium martagon .

[2] To combine her caring responsibilities and academic pursuits, she ran a small laboratory in the grounds of her mother's house in Reigate, which she called "Jodrell Junior" .

During World War I, she organised the register of university women qualified to do work of national importance, which was afterwards taken over by the Ministry of Labour.