Lieutenant Commander Georg Lassen (May 12, 1915 – January 18, 2012) was a German U-boat captain who served with the Kriegsmarine during World War II. He was a Watchkeeping Officer on at the outbreak of the war and later the skipper of the and winner of the Iron Cross. He sank 26 ships for a total of during 4 patrols, leading to a remarkable average of per patrol. His total tonnage made him the 10th most successful U-boat ace of the war.