Stephen Colbert is a practicing Catholic. He was raised Catholic and comes from a family of 11 kids.
Colbert is either a cryptocatholic or another in a long line of Hollywood “Catholics” for whom their faith plays no real role in their lives; I would like to believe the former. His Catholicism is rarely addressed in the media. One exception was an NPR interview with Terry Gross on Fresh Air in which she questioned him about the tension between his Catholicism and his series of Daily Show segments, The Week In God. Beyond that, examples of Colbert discussing his Catholicism are few and far between.