This Kids Count data book examines trends in the well-being of California's children, focusing on factors influencing young children. The statistical portrait is based on trends in 54 indicators of well-being in 4 areas: (1) education, including preschool participation, licensed child care spaces, percentage of income spent on child care, reading and math skills, per pupil expenditure, and teacher/caregiver compensation; (2) health, including uninsured children, prenatal care, Medi-Cal and Healthy Families enrollment, infant mortality, teen birth rate, and immunizations; (3) family economics, including child poverty rate, median household income, child care costs, children's TANF participation, and participation in nutrition or food stamp programs; and (4) safety, including child abuse rates, foster care, gun violence, child mortality, and juvenile incarceration. Following introductory remarks, the data book presents recommendations in each area arising from the report's findings and explains the county and state rankings and demographic calculations. The first part of the data book, organized by area, details findings for each indicator, focusing on national averages and California's state rank, and on recent trends. Racial/ethnic and income differences in indicators are presented when available. The second part of the book presents county data for 20 indicators and for demographics. The data book's findings indicate that 20 percent of California's children live in poverty, nearly 25 percent experience food insecurity, and about 14 percent lack health coverage. Racial/ethnic disparities in well-being remain significant in the areas of low birthweight and mother's educational attainment. (KB)