John Lilly

John Lilly may refer to:


 * John C. Lilly (1915–2001), American physician, psychoanalyst and writer
 * John Lilly (computer scientist) (born 1971), former chief executive officer of the Mozilla Corporation
 * John Lilly (priest) (died 1825), Archdeacon of Hereford
 * John Lilly (writer) (c. 1553–1606), English writer