|Ordered||14 Oct 1941|
|Laid down||4 Feb 1943||Danziger Werft AG, Danzig (werk 138)|
|Launched||28 Aug 1943|
|Commissioned||8 Dec 1943||Oblt. Herbert Wagner|
|Successes||No ships sunk or damaged|
Damaged by a torpedo explosion on 28 July, 1944 at Eckernförde. Stricken at Kiel on 28 Aug 1944. Scuttled in May 1945 at Deutsche Werke, Kiel (Dock 2).
Men lost from U-boats
Unlike many other U-boats, which during their service lost men due to accidents and various other causes, U-1166 did not suffer any casualties (we know of) until the time of her loss.