Sir Nasser David Khalili KCSS (Persian: ناصر داوود خلیلی, born 18 December 1945) is a British scholar, collector, and philanthropist based in London. Born in Iran and educated at Queens College, City University of New York and the School of Oriental and African Studies in London, he is a naturalised British citizen.
He assembled eight art collections—the Khalili Collections—each considered among the most important in its field. These collections total 35,000 artworks and include the largest private collection of Islamic art and a collection of Japanese art rivalling that of the Japanese imperial family. He has spent tens of millions of pounds on conserving, researching, and documenting the collections, publishing more than seventy volumes of catalogues and research so far. Exhibitions drawn from the collections have appeared in institutions around the world.