Oswald Bayer (German: [ˈbaɪɐ]; born September 30, 1939) is a German Lutheran theologian, and is Professor Emeritus of Systematic Theology at the Evangelical Theological Faculty of the Eberhard Karls University of Tübingen, Germany. The author of several books in German, he is also an ordained pastor of the Evangelical-Lutheran Church in Württemberg and president of the senate of the Luther Academy in Ratzeburg. Although Bayer is a major contemporary Lutheran theologian, so far little of his work has been translated from German into English.