Lieutenant-Colonel Charles Aitchison Smith CIE (12 September 1871 – 26 January 1940) was a British Army and Indian Army officer and administrator in India. Smith was born in Leith, the son of George Smith, a well-known writer on India. His brothers were Sir George Adam Smith and Sir James Dunlop Smith. His sister was the mother of the politician Rab Butler. Smith was educated at the Royal High School, Edinburgh, the University of Edinburgh, and the Royal Military College, Sandhurst. He was appointed Companion of the Order of the Indian Empire (CIE) in the 1920 New Year Honours.