Heinz Bielfeld (30 August 1916 – 11 July 1944) was a German U-boat commander in World War II.
Heinz Bielfeld joined the Reichsmarine in April 1934. From November 1938 to April 1940 he served with the Aircraft Weapons School. Between May and September 1940 he served with the Küstenfliegersgruppe 506. From October 1940 to February 1941, Bielfeld went through U-boat training, including a stint as a supernumerary watch officer on U-97. Bielfeld then went through U-boat commander sea training as Watch Officer on the school boat U-151 during February to August 1941.
From August to October 1941 he went through the U-boat commander course and U-boat familiarisation (Baubelehrung) before taking command of U-703 on 16 October 1941. Bielfeld would then take the boat on seven patrols of 150 days at sea. In July 1943 he was again sent to be a part of construction crew, this time taking command of U-1222 on 1 September 1943.