SM UB-102 was a German Type UB III submarine or U-boat in the German Imperial Navy () during World War I. She was commissioned into the German Imperial Navy on 17 October 1918 as SM UB-102.
UB-102 was surrendered to Italy on 22 November 1918 and broken up in La Spezia in July 1919.
She was built by AG Vulcan of Hamburg and following just under a year of construction, launched at Hamburg on 13 September 1918. UB-102 was commissioned later the same year . Like all Type UB III submarines, UB-102 carried 10 torpedoes and was armed with a deck gun. UB-102 would carry a crew of up to 3 officer and 31 men and had a cruising range of . UB-102 had a displacement of while surfaced and when submerged. Her engines enabled her to travel at when surfaced and when submerged.