SM "U-68 was a Type U 66 submarine or U-boat for the German Imperial Navy () during the First World War. She had been laid down in December 1913 as U-9" of the "U-7" class for the Austro-Hungarian Navy ( or ) but was sold to Germany, along with the others in her class, in November 1914. Under German control, the class became known as the U 66 type and the boats were renumbered; "U-9" became "U-68", and was redesigned and reconstructed to German specifications. She was launched in June 1915 and commissioned in August.