Helen Densmore (c.1833-1904) was most likely born in Canada and died in Brooklyn, New York. She was a physician, women's rights advocate, and entrepreneur. She is most famous for her support of Florence Maybrick, an American woman convicted of murder in England. Densmore helped to organize the Women's International Maybrick Society to advocate on behalf of Maybrick. She became a devoted friend of Maybrick, who lived with Densmore and her husband, Emmet, in Brooklyn after her release. Densmore was a proponent of natural food as well as simplicity in living and diet. She authored several books on the subject and founded the Stillman Remedies Co., which manufactured herbal remedies. Although she expressed an interest in Christian Science, there is no record of her studying with Mary Baker Eddy or uniting with the Church of Christ (Scientist).

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