William Lane Craig (/kreɪɡ/; born August 23, 1949) is an American analytic philosopher, Christian apologist, author, and theologian. He is a professor emeritus of philosophy at the Talbot School of Theology of Biola University.

Craig earned a doctorate in philosophy from the University of Birmingham in 1977 and a second doctorate in theology from the University of Munich in 1984. He was a professor of the philosophy of religion at Trinity Evangelical Divinity School from 1980 to 1986, a professor of religious studies at Westmont College from 1986 to 1987, and a researcher at KU Leuven from 1987 to 1994. After joining the faculty of the Talbot School of Theology, he also taught as a professor of philosophy at Houston Christian University from 2014 to 2024.

Craig has updated and defended the Kalam cosmological argument for the existence of God. He has also published work where he argues in favor of the historical plausibility of the resurrection of Jesus. His study of divine aseity and Platonism culminated with his book God Over All.

Craig was born on August 23, 1949, in Peoria, Illinois, to Mallory John Craig, a railway executive, and Doris Irene Walker, a homemaker. He was raised in Keokuk, Iowa. He attended East Peoria Community High School from 1963 to 1967, where he competed in debate and won the state championship in oratory. In September 1965, his junior year, he became a Christian.

After high school, Craig attended Wheaton College, where he graduated with a Bachelor of Arts in communications in 1971 with high honors. He married his wife, Jan, whom he met on the staff of Campus Crusade for Christ, the next year. They have two grown children and reside in suburban Atlanta, Georgia.

In 1973, Craig entered the program in philosophy of religion at Trinity Evangelical Divinity School north of Chicago, where he studied under Norman Geisler. He graduated summa cum laude with two master's degrees: a Master of Arts in the philosophy of religion, and a second M.A. in church history and the history of Christian thought. In 1975, Craig began doctoral studies in philosophy at the University of Birmingham in England. He wrote his doctoral dissertation there on the cosmological argument under the direction of John Hick. He earned his Ph.D. in 1977. Out of this study came his first book, The Kalām Cosmological Argument (1979), a defense of the argument he first encountered in theologian Stuart Hackett's work on the same topic.

Craig was awarded a postdoctoral fellowship in 1978 from the Alexander von Humboldt Foundation to pursue research on the historicity of the resurrection of Jesus under the direction of Wolfhart Pannenberg at the University of Munich in Germany. He earned a second doctorate, a Doctor of Theology, under Pannenberg's supervision in 1984. His second doctoral thesis was titled, The Historical Argument for the Resurrection of Jesus During the Deist Controversy (1985).

Craig joined the faculty of Trinity Evangelical Divinity School in Deerfield, Illinois in 1980, where he taught philosophy of religion until 1986.