Nadarajah Selvarajah (Tamil: நடராஜா செல்வராஜா) (b. October 20, 1954, Jaffna) is a Sri Lankan librarian, writer and bibliographer.
During 1981-82 he served for a year in Indonesia under the United Nations Development Programme, where he organised a Model Rural Community Library System for that country in the Village Marengmang near the provincial capital, Bandung, in the Island of Java.
In 1983 he became the Chief Librarian at the Evelyn Rutnam Institute for Inter-Cultural Studies affiliated to the Jaffna College.
He is the founder of the charity European Tamil Documentation and Research Centre (ETDRC) in the United Kingdom in 2009.
He is the first Sri Lankan who has received this prestigious award for his services to the Community, and the Country as a professional librarian.