Admiral Rainer Feist (12 April 1945 – 19 May 2007) was an officer in the German Navy until his retirement in 2004.

From then on Feist served as assistant branch chief of "Politico-Military Affairs" at the German Ministry of Defence in Bonn (1981–1983) and as branch chief of "Planning" at the Allied Command Baltic Approaches (BALTAP) in Denmark (1984–1987).

He commanded the 2nd Fast Attack Craft Squadron based in Olpenitz between 1987 and 1990 and was instructor at the Bundeswehr Command and Staff College, which was followed by a service run at the Armed Forces Staff, Federal Ministry of Defence in Bonn as branch chief of "Politico-Military Affairs".

Feist was promoted to the rank of admiral (four stars) in 2002, thus becoming the highest-ranking officer in the German Navy, and he was appointed Deputy Supreme Allied Commander Europe (DSACEUR).

Feist was retired from active duty by Federal Minister for Defence, Peter Struck, on 15 September 2004.