Lydia Hoyt Farmer (née , Hoyt; July 19, 1842 or 1843 – December 27, 1903) was a 19th-century American author and women's rights activist. For many years, Farmer contributed to the leading newspapers and magazines, on various lines: poems, essays, juvenile stories, historical sketches and novels. She was of a deeply religious nature, and endeavored to tinge all her writings with a moral as well as an amusing sentiment. She edited What America Owes to Women, for the Woman's Department of the World's Columbian Exposition. Her works included: Aunt Belindy's Point of View; The Doom of the Holy City; A Story Book of Science; A Knight of Faith; Short History of the French Revolution; Girls' Book of Famous Queens; What America Owes to Women; and others. Farmer died in 1903.