In the last two decades, several religious groups have moved to allow same-sex couples to marry within their traditions.
There has been a modest drop in overall rates of belief in God and participation in religious practices. But religiously affiliated Americans are as observant as before.
The nation’s population is growing more racially and ethnically diverse – and so are many of its religious groups, both at the congregational level and among broader Christian traditions.
Many large religious groups have taken positions in opposition to the death penalty even though that stance is sometimes at odds with the opinions of their adherents.
Louisiana Gov. Bobby Jindal, a newly declared Republican candidate for president, is hoping to attract support from conservative evangelical Christian voters. Jindal himself is a Catholic, and, as the son of immigrants from Hindu-majority India, was raised in the Hindu faith.
One-in-five immigrants identified themselves as unaffiliated in 2014, an increase of 4 percentage points from the 16% who said so in 2007.
Christians are declining, both as a share of the U.S. population and in total number, while religious "nones" continue to rise.
The Christian share of the U.S. population is declining, while the share of Americans who do not identify with any organized religion is growing. These changes affect all regions in the country and many demographic groups.
Explore the geographic distribution and demographics of America's major religious groups.
India is projected to have 310 million Muslims (11% of the global total), making it the country with the largest population of Muslims in the world.