SM UB-111 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 5 April 1918 as SM UB-111. UB-111 was surrendered to Britain on 21 November 1918 in accordance with the requirements of the Armistice with Germany and broken up in Bo'ness in 1919-20.