Peter F. Steinfels (born in 1941) is an American journalist and educator best known for his writings on religious topics.

A native of Chicago, Illinois, and a lifelong Roman Catholic, Steinfels earned his Ph.D from Columbia University and joined the staff of the journal Commonweal in 1964. He served as a visiting professor at Notre Dame in 1994-95 and then as visiting professor at Georgetown University from 1997 to 2001. He currently writes a biweekly column, called "Beliefs", for the religion section of the New York Times.

He is a professor at Fordham University and co-director of the Fordham Center on Religion and Culture. Steinfels has also written several books, including The Neoconservatives: The Men Who Are Changing America's Politics (ISBN 0-671-41384-8) and A People Adrift: The Crisis of the Roman Catholic Church in America (ISBN 0-684-83663-7).