Count John Albert Bentinck, FRS (29 December 1737 – 23 September 1775) was a Royal Navy officer, inventor and politician who served in the British House of Commons from 1761 to 1768 representing the constituency of Rye.

In August 1752, he was serving as a volunteer on board HMS Centurion, in which vessel he visited Lisbon, but returned in the same year to Leyden, where he remained for some time.

In 1753, he was appointed midshipman to HMS Penzance, a fifth-rate of 44 guns, commanded by Captain Hugh Bonfoy, and joined his ship at Plymouth in June of that year to make a voyage in the following July to Newfoundland.

In this vessel he was employed in 1760 as a cruiser, and distinguished himself highly in an engagement with a French ship of war of very superior weight and armament—the 74-gun Diadème.

About a week after this action, in returning from Plymouth, where he had gone to repair damages, he fell in with and captured the Jason, a French privateer carrying 8 guns and 52 men.

They had five children; two boys and three girls, their eldest son, William Bentinck (1764–1813), also entered the Navy, and rose to the rank of vice-admiral.