German submarine U-1104 was a Type VIIC/41 U-boat of Nazi Germany's Kriegsmarine during World War II.

She was ordered on 14 October 1941, and was laid down on 29 June 1943, at Nordseewerke, Emden, as yard number 226.

She was launched on 7 December 1943, and commissioned under the command of Oberleutnant zur See Rüdiger Perleberg on 15 March 1944.

The submarine was powered by two Germaniawerft F46 four-stroke, six-cylinder supercharged diesel engines producing a total of 2,800 to 3,200 metric horsepower (2,060 to 2,350 kW; 2,760 to 3,160 shp) for use while surfaced, two SSW GU 343/38-8 double-acting electric motors producing a total of 750 metric horsepower (550 kW; 740 shp) for use while submerged.

Of the 156 U-boats that eventually surrendered to the Allied forces at the end of the war, U-1104 was one of 116 selected to take part in Operation Deadlight.