Jonathan Thorn (8 January 1779 – 15 June 1811) was an officer of the United States Navy in the early 19th century. He was born on 8 January 1779 at Schenectady, N.Y.. He was appointed a midshipman on 28 April 1800. Subsequently serving with the Navy during the Tripolitan War, Thorn volunteered to take part in the hazardous expedition to destroy the captured frigate Philadelphia, which lay beneath the guns of the defended Tripoli harbor. On 16 February 1804, Lieutenant Stephen Decatur, Jr., led a party of these volunteers in the ketch Intrepid into Tripoli and burned the erstwhile American frigate.