Admiral Douglas Lionel Dent CB CMG (7 August 1869 – 11 July 1959) was a Royal Navy officer who became Chief of the Submarine Service.

Born the son of Rear Admiral Charles Calmady Bayley Dent, Dent joined the Royal Navy in July 1882.

[1] He was posted to HMS President, drill-ship of the Royal Naval Reserve, in August 1902, for service with the Ordnance Committee.

[2] Promoted to captain on 30 June 1908, he became commanding officer of the cruiser HMS Blenheim in March 1910.

[3] He went on to be Chief of the Submarine Service in August 1919 and Director of Naval Equipment at the Admiralty in May 1922 before retiring in May 1924.