Elfie Gidlow (29 December 1898 – 8 June 1986) was a British-born, Canadian-American poet, freelance journalist, and philosopher. She is best known for writing On A Grey Thread (1923), possibly the first volume of openly lesbian love poetry published in North America. In the 1950s, Gidlow helped found Druid Heights, a bohemian community in Marin County, California.