Thomas Ephraim Peck was an American Presbyterian minister, theologian, author, and teacher who served in key pastorates in Maryland and Virginia, co-edited influential Presbyterian periodicals, and spent over three decades as a beloved professor of church history and systematic theology at Union Theological Seminary. His writings and teaching, shaped by the Thornwell–Dabney school of Southern Presbyterian thought, made him a significant 19th-century voice for biblical fidelity, ecclesiastical reform, and Reformed doctrine in the American church.