John Edwin Thiel (born July 28, 1951) is the Aloysius P. Kelley, S.J. Professor of Catholic Studies, Emeritus, Fairfield University, Fairfield, Connecticut, U.S.A, where he taught for 49 years.
He received his B.A. from Fairfield University and his M.A. and Ph.D. from McMaster University. He was Visiting Professor of Religious Studies, Yale University, in the spring semesters of 2000, 2019, and 2020. Twice a recipient of fellowships from the National Endowment for the Humanities, he is the author of seven books. He writes in the field of Roman Catholic systematic theology. He served as president of the Catholic Theological Society of America in 2011-12, and as president of the American Theological Society in 2023-24
2014 Alpha Sigma Nu Book Award, Theology Category
2014 Catholic Press Writers Association Book Award, Theology Category