Christianity in America

Christianity is the most adhered to religion in the United States, with 75% of polled American adults identifying themselves as Christian in 2015. This is down from 86% in 1990, lower than 81.6% in 2001, and slightly lower than 78% in 2012. About 62% of those polled claim to be members of a church congregation. The United States has the largest Christian population in the world, with nearly 280 million Christians, although other countries have higher percentages of Christians among their populations.

All Protestant denominations accounted for 51.3%, while the Catholic Church by itself, at 23.9%, was the largest individual denomination. A 2008 Pew study categorizes white evangelical Protestants, 26.3% of the population, as the country's largest religious cohort; another study in 2004 estimates evangelical Protestants of all races at 30–35%. The United Methodist Church is the third largest church in the United States, and is the largest mainline denomination.The Church of Jesus Christ of Latter-day Saints (Mormons) is the fourth largest church in the United States, and the largest church originating in the U.S.

Christianity was introduced to the Americas as it was first colonized by Europeans beginning in the 16th and 17th centuries. Going forward from its foundation, the United States has been called a Protestant nation by a variety of sources. Immigration further increased Christian numbers. Today most Christian churches in the United States are Mainline Protestant, Evangelical Protestant, or Catholic.

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