John Dorsey (about 1780 - 7 August 1804) was an officer in the United States Navy during the First Barbary War.

Born in Maryland, Dorsey was appointed midshipman 28 April 1801. He was killed 7 August 1804 in the attack on Tripoli in north Africa when Gunboat No. 9 was blown up by an enemy shell.

USS Dorsey (DD-117) was named for him.

• For other people named John Dorsey see Dorsey