Alan Jay Heeger (born January 22, 1936) is an American physicist, academic and Nobel Prize laureate in chemistry. He won the Nobel Prize for Chemistry in 2000 along with Alan G. MacDiarmid and Hideki Shirakawa "for their discovery and development of conductive polymers".

He earned a B.S. in physics and mathematics from the University of Nebraska-Lincoln in 1957, and a Ph.D in physics from the University of California, Berkeley in 1961. His research has led to the formation of numerous start-up companies including Uniax, Konarka, and Sirigen, founded in 2003 by Guillermo C. Bazan, Patrick J. Dietzen, Brent S. Gaylord.
he had won the Oliver E. Buckley Prize of the American Physical Society in 1983 and, in 1995, the Balzan Prize for Science of Non-Biological Materials.