German submarine U-188 was a Type IXC/40 U-boat of the Nazi German Kriegsmarine built for service during World War II. Laid down on 15 August 1941 by AG Weser of Bremen as 'werk' 1028, she was launched on 30 March 1942 and commissioned on 5 August under the command of Oberleutnant Siegfied Lüdden. The boat carried out three patrols and she was a member of three wolfpacks. She sank eight ships and one warship; she also damaged one ship. She was scuttled at Bordeaux, France in August 1944. The wreck was broken up in 1947.