SM U-102 or SM Unterseeboot 102 was a German Type U 57 submarine used by the Imperial German Navy in World War I. U-102 was launched on 12 May 1917.

[2] Serving with II Flotilla the U-boat carried out seven war patrols and sank four ships for a total of 9,340 gross register tons (GRT), and damaged another of 10,757 GRT tons (HMS Virginian).

[2] About 28 to 30 September 1918 U-102 struck a mine in the North Sea Mine Barrage, east of the Orkney Islands while on her way to home.

All of her 42 crew members' lives were claimed by the U-boat's sinking.

Information to confirm the identification was obtained by divers in 2007.