Augusta Emma Stetson (née Simmons) (October 12, 1842 – October 12, 1928) was an American religious leader. Known for her impressive oratory skills and magnetic personality, she attracted a large following in New York City. However, her increasingly radical theories, conflicts with other church members including a well-known rivalry with Laura Lathrop, and attempts to supplant Mary Baker Eddy as the leader of The First Church of Christ, Scientist, led to her eventually being excommunicated from the church on charges of insubordination and of false teaching. Afterwards she began preaching and publishing various works on her theories which she named the "Church Triumphant," and started a controversial radio station to advance her cause.