German submarine U-422 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II.

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 Siemens-Schuckert GU 343/38–8 double-acting electric motors producing a total of 750 metric horsepower (550 kW; 740 shp) for use while submerged.

[3] The submarine was laid down on 11 February 1942 at the Danziger Werft (yard) at Danzig (now Gdansk), as yard number 123, launched on 10 October and commissioned on 10 February 1943 under the command of Oberleutnant zur See Wolfgang Poeschel.

U-422 then left Bergen on 8 September 1943 and headed for the Atlantic Ocean via the gap between Iceland and the Faroe Islands.

On 4 October, she was attacked and sunk by a FIDO homing torpedo dropped by an American TBM Avenger which was accompanied by a F4F Wildcat.