Sir Charles Justin MacCarthy (1811–1864) was the 12th Governor of British Ceylon and the 12th Accountant General and Controller of Revenue. He was appointed on 22 October 1860 and was Governor until 1 December 1863. He also served as acting governor on two separate occasions. He was first appointed in 1850.

The governor of Ceylon was the representative in Ceylon of the British Crown from 1795 to 1948. In this capacity, the governor was president of the Executive Council and Commander-in-Chief of the British Forces in Ceylon. The governor was the head of the British colonial administration in Ceylon, reporting to the Colonial Office.