Up-to-date state information on children of immigrants is essential for social policies that affect children and families. This brief, accompanying the Urban Institute's interactive Children of Immigrants Data Tool, describes the national and state characteristics of children of immigrants based on recent American Community Survey data. Since children of immigrants account for almost a quarter (24 percent) of children under age 5, their share in the school-age population will increase, with important implications for education policy. In addition, children of immigrants' poverty and low-income rates vary across states, highlighting the importance of state and local policies in promoting children's well-being.