Detlef Seif (born 15 August 1962 in Euskirchen) is a German politician. He is a member of the CDU party. Since 2009 he is a MP of the German Bundestag.
Seif is married and has a daughter.
During the Böhmermann affair, Seif read the Böhmermann's "smear poem" in the German Bundestag to demonstrate that it is an insult of the Turkish president, which caused the outrage of other MPs.