|Ordered||5 Jun 1941|
|Laid down||15 Jul 1942||AG Weser, Bremen (werk 1067)|
|Launched||29 Apr 1943|
|Commissioned||2 Sep 1943||Kptlt. Jürgen Oesten (Knights Cross)|
|Successes||3 ships sunk, total tonnage 20,311 GRT|
1 auxiliary warship sunk, total tonnage 1,737 GRT
1 ship damaged, total tonnage 8,139 GRT
Surrendered on 9 May 1945 at Trondheim, Norway (Waller & Niestlé, 2010).
Transferred to Lisahally, Northern Ireland on 29 May, 1945 for Operation Deadlight.
Operation Deadlight (post-war Allied operation, info)
Men lost from U-boats
Unlike many other U-boats, which during their service lost men due to accidents and various other causes, U-861 did not suffer any casualties (we know of) until the time of her loss.