The Faith of the Electorate
The majority of the United States electorate is Christian. According to a 2012 U.S. Census Statistical Abstract, three quarters of Americans responded that they adhere to the Christian faith. The next largest group identify themselves as having no religion. Following that, were those who identify themselves as Jewish, Agnostic, Atheist, Muslim, Buddhist, and Hindu.
According to a 2010 Association of American Religion Data Archives report, of those who identify themselves as Christian, 140 million identify themselves as nondenominational, 62 million as Catholics, 40 million as Evangelical Protestants, and 26 million as Mainline Protestants.
The top three states with the greatest number of religious congregations are Texas, California, and Pennsylvania.
According to a Public Religion Research Institute survey, two-thirds of voters (39%) identified that it is very important, and 28% of voters identified that it was somewhat important, for a presidential candidate to hold strong religious beliefs.