George Teasdale (8 December 1831 – 9 June 1907) was a Mormon missionary and a member of the Quorum of the Twelve Apostles of the Church of Jesus Christ of Latter-day Saints (LDS Church). Teasdale was born in London, England. Teasdale was baptized into the LDS Church on 8 August 1852, after learning about the church from a Mormon co-worker. Teasdale was ordained an apostle on 16 October 1882, by church president John Taylor. Future church president, Heber J. Grant, was ordained an apostle on the same date. Teasdale immediately served a six-month mission to the Indian Territory.