In the U.S., Christianity is the largest religion by a wide margin: more than three-quarters of Americans identify as Christians. Buddhism is second. The data comes from a 2010 census sponsored by the Association of Statisticians of American Religious Bodies.
This is a very interesting infographic via the Washington Post, which also published an even more detailed breakdown by county. It’d be interesting to see a similar mapping with “atheism/agnostic” included as a comparison. The lack of inclusion of His Noodly Goodness (Hail FSM) is a real oversight, obviously. Larger size here.
Via Boing Boing