Emerging adults (approximately 18 to 25 years of age) experience heightened self-exploration regarding their beliefs and values, including those concerning religiosity and spirituality. The purpose of this article is to review the literature regarding religiosity and spirituality in emerging adulthood. First, we document developmental advances in physical, cognitive, and psychosocial development that support this exploration along with theoretical and empirical work on how religiosity and spirituality develop during this time period. Second, we examine the research on prevalence rates for and correlates of religiosity and spirituality. Third, we examine socializing agents of religiosity and spirituality that document parents' indirect role relative to other adults, peers, and the media. Next, we examine the role that culture, community, and gender play in the development and socialization of religious and spiritual beliefs and practices. Lastly, future research directions and implications of the findings are discussed.