The American Religious Landscape: Facts, Trends, and the Future

At its founding, the United States was an overwhelmingly Protestant country. However, over the last 250 years, it has become increasingly diverse with tens of millions of Catholics, millions of Latter-day Saints, Muslims, Hindus, and Jews, alongside a rapidly increasing share of Americans who claim no religious affiliation at all.

The American Religious Landscape uses an in-depth statistical analysis of large datasets to answer foundational questions about this diversity, such as: How many ...