Sarah Marinda Bates Pratt (February 2, 1817 – December 25, 1888) was the first wife of LDS Apostle and polygamist Orson Pratt and later a critic of Mormon polygamy.
She was a founder of the Anti-Polygamy Society in Salt Lake City and called herself a Mormon apostate.
She was born in Henderson, Jefferson County, New York, the first daughter and third child of Cyrus Bates and Lydia Harrington Bates.