In recent years, the share of Americans who identify with mainline Protestantism has been shrinking significantly, a trend driven partly by generational change.
One big reason evangelical Protestants have not declined at the same rate as other major Christian groups is that they are gaining new converts at a greater rate than they are losing people who were raised in the tradition.
The growth of the religiously unaffiliated in the U.S. is occurring across genders, generations and racial and ethnic groups.
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.
The number of Christians in Europe is forecast to drop by about 100 million by 2050, while the share of Muslims and smaller religious minorities will increase.
If current demographic trends hold, by 2050, Muslims are projected to be more numerous in the U.S. than people who identify as Jewish on the basis of religion.
Demographer Conrad Hackett explains how he and his team put together our major new report and why it differs from past efforts to predict religious change.
