Sheri Stewart Tepper (born July 16, 1929) is an American author of science fiction, horror and mystery novels; she is particularly known as a feminist science fiction writer, often with an ecofeminist slant.
Born near Littleton, Colorado, for most of her career (1962–1986) she worked for Rocky Mountain Planned Parenthood, where she eventually became Executive Director. She has two children and is married to Gene Tepper. She currently operates a guest ranch near Santa Fe, New Mexico.
She has written under several pseudonyms, including A. J. Orde, E. E. Horlak, and B. J. Oliphant. Her early work was published under the name Sheri S. Eberhart.