Karl Borsch (born August 1, 1959 in Krefeld-Hüls) is auxiliary bishop of Aachen.
Born in Krefeld, he grew up in Kempen, where he also attended the gymnasium Thomaeum, where he graduated with abitur.
From 1985-1990 he studied theology at the Philosophisch-Theologische Hochschule Sankt Georgen (Frankfurt) and in Freiburg.
From October 2002 until March 2004 he was also director of the Collegium Leoninum seminary in Bonn.
The motto of Bishop Borsch is Quaerite primum regnum Dei (But seek first the kingdom of God), taken from Gospel of Matthew (6:33).