SM UB-142 was a German Type UB III submarine or U-boat in the German Imperial Navy (German: Kaiserliche Marine) during World War I. She was commissioned into the German Imperial Navy on 31 August 1918 as SM UB-142.
She was surrendered to France on 22 November 1918 in accordance with the requirements of the Armistice with Germany and broken up at Landerneau in July 1921.
See main article: Type UB III submarine. She was built by AG Weser of Bremen and following just under a year of construction, launched at Bremen on 23 July 1918. UB-142 carried 10 torpedoes and was armed with a 10.52NaN2 deck gun. UB-142 would carry a crew of up to 3 officer and 31 men and had a cruising range of 7280nmi. UB-142 had a displacement of 523lk=inNaNlk=in while surfaced and 653t when submerged. Her engines enabled her to travel at 13.5kn when surfaced and when submerged.