Proehl, Otto Ludwig was born on April 12, 1887 in Castleton, Illinois, United States. Son of Carl and Angie (Schwartz) Proehl.
Bachelor of Arts, Wartburg College, Clinton, Iowa, 1907. Graduate Wartburg Theological Seminary, Dubuque, Iowa, 1910. Post-graduate work, University of Rostock, Germany, 1910-1911, University of Leipzig, 1911-1912, University of Chicago, 1935-1938.
Studied summers, University of Wisconsin and Columbia University.
Ordained ministry Lutheran Church, 1912. Pastor Trinity Church, Woods Run, Pittsburgh, Pennsylvania, 1912-1916, First Evangelical Lutheran Church, Galveston, Texas, 1916-1919. President Wartburg College, 1919-1935.
Pastor Zion Evangelical Lutheran Church, Philo, Illinois Address: Philo, Illinois.
Married Caroline Reinhard, April. Children: Carl William, Paul Otto, Elsa Carolina, Louise Mathilda.