Benjamin Carpenter (born c. 1713/14 – 8 March 1788) was a British soldier and courtier.

The son of Colonel Robert Carpenter, who was killed at the head of the 3rd Foot Guards at the Battle of Fontenoy in 1745, Benjamin Carpenter was for many years an officer of the 2nd Troop of Horse Guards, in which corps he rose to the rank of lieutenant-colonel.

He was a great favourite with King George III, to whom he was made an equerry on 16 December 1760.

He was appointed clerk marshal of the mews on 6 April 1771 and principal equerry in the royal establishment on 1 January 1783.

However, he escaped from them and went to Hyde Park, where he drowned himself in the Serpentine river at about 5 AM on 8 March 1788.