Siegfried Thomaschki (20 March 1894 – 31 May 1967) was a German general during World War II who commanded the 11th Infantry Division.

He was a recipient of the Knight's Cross of the Iron Cross with Oak Leaves of Nazi Germany.

Thomaschki surrendered to the Soviet forces in the Courland Pocket on 8 May 1945.

Convicted in the Soviet Union as a war criminal, he was held until 1955.