Friedrich August Rauch (afterwards Frederick August Rauch) (27 July 1806 at Kirchbracht in Hesse Darmstadt – 2 March 1841) was a professor of systematic theology at Marshall College in Mercersburg, Pennsylvania. He is often credited as the originator of Mercersburg Theology, although Philip Schaff and John Williamson Nevin were more integral in the development of its views. Rauch died on 2 March 1841. He was buried in Mercersburg, however, his remains were later moved to Lancaster, Pennsylvania.