|Ordered||5 Jun 1941|
|Laid down||31 Oct 1942||AG Weser, Bremen (werk 1062)|
|Launched||11 May 1943|
|Commissioned||19 Aug 1943||Oblt. Friedrich Wittenberg|
|Successes||No ships sunk or damaged|
Sunk on 7 April 1944 in the North Atlantic south-east of Boston, in position 40.18N, 62.22W, by depth charges from the US destroyer USS Champlin and the US destroyer escort USS Huse. 27 dead and 28 survivors.
Men lost from U-boats
Unlike many other U-boats, which during their service lost men due to accidents and various other causes, U-856 did not suffer any casualties (we know of) until the time of her loss.