This survey course explores the fast growth of secularism in the United States. Today, about one-quarter of Americans claim no affiliation with a religious denomination or tradition, tripling their share of the population in just over a generation. Secular America, despite its size remains a misunderstood demographic. Students will spend each week exploring the truth behind different facts of secular America. The course starts exploring the ways in which secularism is defined and measured in public opinion research and the reasons religious identification is the main marker of secularism. The course will continue debating the main theories explaining the growth of secularism in America, including generational and educational explanations. The third module explores the demographics of secular America and how it has become more racially, generationally, and sexually diverse as the population continues to grow. The course closes with a discussion of the potential impact in electoral politics and elective office of secular people in the American political system.