Lewis Sperry Chafer (February 27, 1871 – August 22, 1952) was an American theologian. He co-founded Dallas Theological Seminary with his older brother Rollin Thomas Chafer (1868–1940), served as its first president, and was an influential proponent of ChristianDispensationalism in the early 20th century. John Hannah described Chafer as a visionary Bible teacher, a minister of the gospel, a man of prayer with strong piety. One of his students, Charles Caldwell Ryrie, who went on to become a theologian and scholar, stated that Chafer was an evangelist who was also "an eminent theologian."