World War II Captain Ralph Kerr CBE (16 August 1891 – 24 May 1941) was an officer in the Royal Navy.

He served in the First and Second World Wars, and was killed in the sinking of HMS Hood by the German battleship Bismarck at the Battle of the Denmark Strait.

He joined the Royal Navy on 15 May 1904, and after service as a cadet he rose through the ranks, being promoted to Lieutenant on 28 February 1914.

[1] He served in the First World War, spending most of the period aboard the battleship HMS Benbow, the flagship of Admiral Sir Doveton Sturdee.

His commander, Admiral Thomson, reported that he had found Kerr to be "A very capable Captain (D) who has trained his Flotilla well.

During this period he served under Vice-Admiral John Tovey, and impressed both him, and the Commander-in-Chief Mediterranean Admiral Sir Dudley Pound.

[2] He had married Margaret Augusta Kerr on 14 February 1920, the marriage producing two children, Russell and Jane.

Russell Kerr, who had served as a captain in the Royal Artillery and as a tank commander, was killed while fighting in Burma in 1945.