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.