John Manley (born 1952) is a British archaeologist and author. His book, A.D. 43, published by Tempus in 2002, is the first to give serious consideration to the archaeological evidence for the Roman invasion of Britain having taken place via alternative routes (as opposed to the traditional view of Richborough in Kent as the main landing-place).

John Manley was educated at the University of Manchester, and has excavated throughout Europe. He was formerly County Archaeologist of Clwyd and is currently Chief Executive of the Sussex Archaeological Society.