German submarine U-2356 was a Type XXIII U-boat of Nazi Germany's Kriegsmarine during World War II. She was ordered on 20 September 1944, and was laid down on 21 October 1944 at Deutsche Werft AG, Hamburg, as yard number 510. She was launched on 19 December 1944 and commissioned under the command of Oberleutnant zur See Friedrich Hartel on 12 January 1945.
Like all Type XXIII U-boats, U-2356 had a displacement of when at the surface and while submerged. She had a total length of (o/a), a beam width of (o/a), and a draught depth of . The submarine was powered by one MWM six-cylinder RS134S diesel engine providing , one AEG GU4463-8 double-acting electric motor electric motor providing , and one BBC silent running CCR188 electric motor providing .
The submarine had a maximum surface speed of and a submerged speed of . When submerged, the boat could operate at for ; when surfaced, she could travel at . U-2356 was fitted with two torpedo tubes in the bow. She could carry two preloaded torpedoes. The complement was 14âÂÂ18 men. This class of U-boat did not carry a deck gun.
On 5 May 1945, U-2356 surrendered at Cuxhaven, Germany. She was later transferred to Lisahally, Northern Ireland on 21 June 1945. Of the 156 U-boats that eventually surrendered to the Allied forces at the end of the war, U-2356 was one of 116 selected to take part in Operation Deadlight. U-2356 was towed out and sank on 6 January 1946, by gunfire from the British destroyer .
The wreck now lies at .