Sriskandarajah is a surname. Notable people with the surname include:
Dhananjayan Sriskandarajah (born 1975), Sri Lankan-born British-Australian activist P. Sriskandarajah (1905–1968), Sri Lankan lawyer and judge S. Sriskandarajah (c.1953–2014), Sri Lankan lawyer and judge Suresh Sriskandarajah (born 1980), Canadian terrorist supporter