Just one member of Congress, Rep. Kyrsten Sinema (D-Ariz.), describes herself as religiously unaffiliated. That's a whopping 0.2 percent.
Now, compare that to the public Congress serves: 20 percent don't consider themselves religious, according to a new Pew Research Center report.
More than 90 percent of legislators are Christian, with more than half of those members Protestant. Another 30 percent of the Christians in Congress identify as Catholic.
About 5 percent of Congress is Jewish, which is actually a significant overrepresentation of the public (2 percent). Buddhism, Islam, and Hinduism are represented about equally in Congress and in the country. Read Pew's full report here.