The transition to adulthood in the United States has changed in recent decades as many of the traditional milestones that mark adulthood, such as household establishment and marriage, have changed or been delayed (McLanahan et al. 2010; Arnett 2000). Among these changes are increased participation and attainment in education; extenuation of educational completion and subsequent delayed participation in the labor force; and delays in child rearing. Accordingly, "America's Youth: Transitions to Adulthood" examines numerous aspects of the lives of youth and young adults, ages 14 to 24, in the United States over the last several decades. The report features status and trend data from multiple surveys on the distribution of youth and their family structure; on school-, employment-, and health-related factors; and on future plans. It presents a selection of indicators that provide a broad perspective on youth; it uses trend data that cover material across disciplines and agency lines and provides information on both positive and negative aspects of the youth experience. These measures are examined in six chapters: Demographics, School-Related Characteristics, Employment-Related Characteristics, Activities Outside of School and Work, Health and Wellness, and Future Goals. Each indicator contains a table, figure, and brief text describing the types of comparisons one might reasonably make. An appendix presents: Technical Note and Guide to Sources. (Contains 55 figures and 55 tables.)