Lieutenant-General Sir Robert Arbuthnot, KCB was a British military commander during the Napoleonic Wars. He was a general in the army, a colonel in the 76th Regiment. He was a brigadier general in the Portuguese Service and was appointed a Knight of the Tower and Sword of Portugal (KTS).

General Officer Commanding, Ceylon was the designation of the General Officer appointed to command all British Army units stationed in the island of Ceylon during the British colonial administration of the island.