To date, the Head Start Family and Child Experiences Survey (FACES) has been a major source of descriptive information on Head Start and preschool children ages 3 to 5 years old who attend the program. There are 12 regions for federal management of Head Start. FACES gathers data on Head Start programs, staff, children, and families from Regions I through X, which are the 10 geographically based Head Start regions nationwide. Regions XI and XII are not geographically based and instead are defined by the populations served. In 2015, a new study--the American Indian and Alaska Native Head Start Family and Child Experiences Survey (AI/AN FACES 2015)--focused on Region XI, which comprises programs operated by federally recognized American Indian and Alaska Native tribes. AI/AN FACES 2015 is the first national study of Region XI AI/AN Head Start children and their families, classrooms, and programs. This set of tables presents data on the demographic backgrounds and developmental outcomes of children enrolled in Region XI AI/AN Head Start programs during the 2015-16 Head Start year. The tables also detail aspects of their home environment and family life. Data on children's classrooms, teachers, centers, and programs, including aspects of classroom quality and practice, teacher and director characteristics, and characteristics of the center and program environments, provide context for children's experiences. Information on the AI/AN FACES 2015 study methodology and collaborative design process, sample, and measures are also provided. The study is conducted by Mathematica Policy Research and its partner--Educational Testing Service--under contract to the Office of Planning, Research, and Evaluation, Administration for Children and Families, U.S. Department of Health and Human Services. The purpose of this report is two-fold: (1) to provide information about the AI/AN FACES 2015 study, including the background, design, methodology, measures, and analytic methods; and (2) to report detailed descriptive statistics in a series of tables on children, their families, and their classrooms, centers, and programs. The data provide descriptive information from parent surveys, direct child assessments, teacher child reports, teacher surveys, classroom observations, and center and program director surveys.