Dietrich "Dieter" Hrabak (born 19 December 1914 in Groß-Deuben, now a part of Böhlen, Saxony, died 15 September 1995 in Pfaffenhofen^{[disambiguation needed ]}) was a German World War II fighter ace who served in the Luftwaffe from 1935 until the end of World War II on 8 May 1945 and again in the Bundeswehr from 1955 until his retirement on 30 September 1970. A flying ace or fighter ace is a military aviator credited with shooting down five or more enemy aircraft during aerial combat. During World War II he shot down 125 enemy aircraft achieved in over 1000 combat missions. 109 of his victories were claimed over the Eastern front, with 16 against the Western Allies.

Hrabak showed an interest in aviation from an early age, but joined the German navy in 1934. Two years later he transferred to the Luftwaffe, and qualified as a pilot. In 1938 Hrabak was posted to the Vienna Jagdgruppe, I./JG 138. This unit was later redesignated I./JG 76 during the Polish Campaign, before becoming II./JG 54 in April 1940.