Johann Mohr (12 June 1916 – 2 April 1943) was a captain with the Kriegsmarine during World War II.

[2] On 24 November and 3 December 1941 Mohr sank the British light cruiser HMS Dunedin and the steamer Sagadahoc.

[5] He sank four ships from Convoy ON 92 in May 1942; SS Empire Dell, Mount Parnes, Cristales and Llanover.

[9] Mohr's last success of the year came on 28 December, when U-124 torpedoed and sank the British ship Treworlas (4,692grt).

In a single action Mohr and his crew sank Broad Arrow (7,718grt), Birmingham City (6,194grt), Collingsworth (5,101grt) and the 4,554grt Minotaur; amounting to approximately 24,000 grts.