Daniel Edwin Barker (born June 25, 1949) is an American atheist activist who served as an evangelical Christian preacher and musician for 19 years but left Christianity in 1984. He and his wife Annie Laurie Gaylor are the current co-presidents of the Freedom From Religion Foundation. He has written numerous articles for Freethought Today, an American freethought newspaper. He is the author of several books including Losing Faith in Faith: From Preacher to Atheist.Barker has been an invited speaker at Rock Beyond Belief. He is on the speakers bureau of the Secular Student Alliance.