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