Nissanka is a given name and surname. Notable people with the name include:
Given name Nissanka Malla of Polonnaruwa (–1196), Sinhalese king Nissanka Wijewardane (1925–2019), Sri Lankan civil servant Nissanka Wijeyeratne (1924–2007), Sri Lankan politician
Surname Herbert Sri Nissanka (1898–1954), Ceylonese lawyer K. W. T. Nissanka (1971–1993), Sri Lankan army officer Pathum Nissanka (born 1998), Sri Lankan cricketer Prabath Nissanka (born 1980), Sri Lankan cricketer Sandun Wijemanne Nissanka (born 1998), Sri Lankan-American record industry executive
See also Nissanka Latha Mandapaya, structure in Sri Lanka