German submarine U-229 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 AEG GU 460/8–27 double-acting electric motors producing a total of 750 metric horsepower (550 kW; 740 shp) for use while submerged.

She crossed the North Sea, passed through the gap between Iceland and the Faroe Islands and entered the Atlantic Ocean.

She sank the British freighter Nailsea Court – part of convoy SC 121 on 10 March 1943 southeast of Cape Farewell, Greenland.

Having moved from Bordeaux to La Pallice in early August 1943, the boat departed the latter port on the 31st.

She was sunk on 22 September 1943 south-east of Cape Farewell, Greenland in position 54°36′N 36°25′W / 54.600°N 36.417°W / 54.600; -36.417, by depth charges, gunfire and ramming by the British destroyer HMS Keppel.