Johann Michael Reu (November 16, 1869 – October 14, 1943) was a German - American Lutheran theologian, author and educator. Johann Michael Reu was born at Diebach, in Bavaria, Germany. He was the youngest of ten children. His father died when Reu was only two years old. Reu studied from 1887 to 1889 at the nearby Neuendettelsau Mission Institute (Neuendettelsauer Missionsgesellschaft) which had been founded by Wilhelm Loehe in 1841. The archives of Wartburg Theological Seminary contain Reu's papers, correspondence, sermons, and writings.