Religion in the United States

How many Presbyterians are there in Alaska? Answer: More than you think. This site contains a growing set of U.S. maps with overlays showing where members of more than a dozen religious denominations reside. Fascinating.

What's up with so few Catholics living in the South? Wait, I think I know why. And here's one I could have drawn without going to the site.

Here's a tight overview combining all the data.