German submarine U-36 was a Type VIIA U-boat of Nazi Germany's Kriegsmarine which served during World War II.

[1] During her service, U-36 undertook three patrols (1 pre-war and 2 war), but was sunk by a torpedo fired by HMS Salmon.

The submarine was also equipped with two Brown, Boveri & Cie GG UB 720/8 electric motors that totaled 750 PS (550 kW; 740 shp).

[4] She then patrolled the North Sea for three weeks, hoping to catch ships traveling between Britain and Scandinavia carrying war supplies.

Seahorse, a British submarine, later fired on U-36 and subsequently claimed to have sunk her, although in fact the torpedo missed.

[5] On 27 September Fröhlich and his crew captured another Swedish vessel, Algeria, which he proceeded to escort back to Germany as the patrol came to an end.

[8] On 4 December 1939, two days out of Wilhelmshaven, she was spotted on the surface near the Norwegian port of Stavanger by the British submarine Salmon.

[10] Following the loss of U-36, U-38 continued towards the Kola Peninsula, successfully reaching the location and accomplished the scouting mission for Basis Nord.