Peter James Leithart (born 1959) is an American author, minister, and theologian, who serves as president of Theopolis Institute for Biblical, Liturgical, & Cultural Studies in Birmingham, Alabama. He previously served as Senior Fellow of Theology and Literature as well as Dean of Graduate Studies at New Saint Andrews College. He was selected by the Association of Reformed Institutions of Higher Education to be one of the organization's 2010–2012 Lecturers. He is the author of commentaries on the Book of Kings, the Book of Samuel, the Books of Chronicles, the Book of Revelation, as well as a Survey of the Old Testament. Other works include books on topics such as Dante's Inferno, Shakespeare, Jane Austen, and a biography of Constantine. He is also the author of a book of children's bedtime