Six-in-ten religious "nones" in the U.S. say the questioning of religious teachings is a very important reason for their lack of affiliation. The second-most-common reason is opposition to the positions taken by churches on social and political issues.

Imagining the U.S. as a town of 100 people can help illuminate the nation's religious diversity.

A Pew Research Center survey of Israel provides a rare window into the religious beliefs and practices of this close-knit group.

Only about half of Millennials say they believe in God with absolute certainty, and four-in-ten say religion is very important in their lives.

Seven decades after the end of World War II, most American Jews say remembering the Holocaust is essential to what being Jewish means to them, personally.