Evangelicals such as Pastor Carl Lentz, leader of Hillsong Church in New York, form the largest faith group in the United States, encompassing 25.4% of the adult population, according to a new Pew Research Center study.
The religiously unaffiliated, including atheists and agnostics, make up nearly 23% of the American population, the study says.
Nearly 21% of Americans are members of Pope Francis' Catholic flock in the United States, according to the study.
The Rev. Luis Leon of St. John's Church in Washington greets the Obamas before the President's first inauguration in 2009. Barack Obama was baptized in the United Church of Christ, one of the mainline Protestant denominations, so called for their prominence in 20th-century American life. Mainline Protestants make up about 14.7% of the American population, the study finds.
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Church members pray at a Baptist church in Baltimore. Black Protestants make up 6.5% of the American population, according to the Pew Research Center study.