Mary Beecher Longyear (December 21, 1851 – March 14, 1931) was an American philanthropist and wife of John Munro Longyear, a wealthy businessman. She funded the first King James Version of the Bible in Braille and was a patron of the arts, education and benevolent organizations. A student of Christian Science, in 1911, she began collecting documents and items related to the early development of the religion and later established the Longyear Museum to further this work.