Charles Powell Leslie (III) (13 September 1821 – 26 June 1871) was Conservative member of the UK Parliament for Monaghan (1843–1871) and Lord Lieutenant of Monaghan (1858–1871). He was the third of his name; his father and grandfather, both also represented Monaghan. Leslie was educated at Christ Church, Oxford, and played one first class cricket match for Oxford University Cricket Club against Marylebone Cricket Club at Lord's on 16-17 March 1841.
He was unmarried, died without issue, and was succeeded as MP by his younger brother Sir John Leslie, 1st Baronet.