SM U-82 was a Type U 81 U-boat of the Imperial German Navy during World War I.
She was launched on 1 July 1916 and commissioned on 16 September 1916 under Hans Adam. She was assigned to IV Flotilla on 21 November 1916, serving with them throughout the war. She carried out 11 patrols during the war, commanded from 30 April 1918 by Heinrich Middendorff. SM U-82 sank 36 ships for a total of , and damaging a further three ships for 32,914 tons. Among the ships she damaged was the USS Mount Vernon, the former SS Kronprinzessin Cecilie. At 18,372 tons she was one of the largest ships to be hit by a U-boat during the war.
She was surrendered to the British on 16 January 1919 under the terms of the armistice, and was broken up at Blyth between 1919 and 1920.
German Type U 81 submarines were preceded by the shorter Type UE I submarines. U-82 had a displacement of when at the surface and while submerged. She had a total length of , a pressure hull length of , a beam of , a