Lewis Alan Gannett (born 1952) is an American writer.
He is the author of two novels, The Living One (1993) and Magazine Beach (1996).
He edited the late C.A.
Tripp's The Intimate World of Abraham Lincoln (2005), a controversial study of Lincoln's sexuality, and published related scholarship in The Journal of the Abraham Lincoln Association.
Gannett is a grandson of Lewis Stiles Gannett, longtime book reviewer for the New York Herald Tribune.