Collett Leventhorpe (May 15, 1815 – December 1, 1889) was a brigadier general in the Confederate States Army during the American Civil War.

In 1832 Leventhorpe purchased the rank of ensign in the 14th Regiment of Foot (the Buckinghamshire's), in the army of King William IV.

He then transferred to the 18th Regiment of Foot and on the 24th of October, 1842 he sold his Captaincy in order to travel to South Carolina on business for an English company.

He spent the early months of the War drilling and disciplining the regiment and by December he was given temporary command of a brigade.

During the winter of 1861-62 he was at Fort Branch near Hamilton, North Carolina guarding the Roanoke River and the Weldon Railroad Bridge.

In April 1862 he was transferred to the 11th North Carolina, elected its colonel and was sent to the Atlantic coast to head the District of Wilmington.

The Union surgeon tending to him detected that gangrene had set in his wound and suggested amputation but Leventhorpe refused, so submitted to allowing the surgeon to cauterize the wound with nitric acid and Leventhorpe refused anesthesia, saying he "would have died, rather than let an enemy see that a Confederate Officer could not endure anything without a complaint.

He was later commissioned brigadier general of state troops and he defended the Roanoke River, Fort Branch, and the Petersburg & Weldon Railroad.

On February 18, 1865, he also became a Brigadier General in the Confederate ranks, but 3 weeks later he refused the appointment, choosing instead to remain in state service.