Sarath Kusum Wickramasinghe (known as S. K. Wickremasinghe) (1926 - 11 June 2020) was a Sri Lankan business executive and diplomat.
The eldest son of Martin Wickramasinghe, a leading Sri Lankan novelist and Kataluwe Balage Prema de Silva, he was educated at S. Thomas' College, Mount Lavinia and graduated from the University of Ceylon with a BSc degree.
In 1964, with import restrictions implemented by Sirima Bandaranaike's government, ICI formed Chemical Industries (Colombo) Limited (CIC) to retain its import licenses allowed by Internal Trade Minister T. B. Ilangaratne.
He was appointed Sri Lankan High Commissioner to the United Kingdom in February 1995 and served till January 1999.
He was a Trustee of the Employers’ Federation of Ceylon and served in the boards of Securities and Exchange Commission (1991-1995), National Education Commission, the Sri Lanka Institute of Development Administration and the Postgraduate Institute of Management of the University of Sri Jayewardenepura.