German submarine U-199 was a Type IXD2 U-boat of Nazi Germany's Kriegsmarine during World War II.

The submarine was powered by two MAN M 9 V 40/46 supercharged four-stroke, nine-cylinder diesel engines plus two MWM RS34.5S six-cylinder four-stroke diesel engines for cruising, producing a total of 9,000 metric horsepower (6,620 kW; 8,880 shp) for use while surfaced, two Siemens-Schuckert 2 GU 345/34 double-acting electric motors producing a total of 1,000 shaft horsepower (1,010 PS; 750 kW) for use while submerged.

U-199 had her first and only significant success, sinking the British merchant ship Henzada on 25 July.

[6] U-199 was found on the surface, off Rio de Janeiro, in position 23°54′S 42°54′W / 23.900°S 42.900°W / -23.900; -42.900, by three aircraft, a PBY Catalina, a Lockheed Hudson (both Brazilian), and an American Martin PBM Mariner of VP-74 on 31 July.

Forty-nine of the crew were killed, although twelve Germans managed to escape including the captain.