Kamalesh Sharma is an Indian diplomat. He was the fifth Secretary General of the Commonwealth of Nations from 2008 to 2016, having previously served as the High Commissioner for India in London. He has served as the Chancellor Emeritus of Queen's University Belfast.

The Commonwealth secretary-general is the head of the Commonwealth Secretariat, the central body which has served the Commonwealth of Nations since its establishment in 1965, and responsible for representing the Commonwealth publicly. The Commonwealth secretary-general should not be confused with the head of the Commonwealth.