After nearly a decade of decline, the number of children living in low-income families has been steadily increasing, a pattern that began in 2000. This data book provides national and 50-state trend data on the characteristics of low-income children over the past decade: parental education, parental employment, marital status, family structure, race and ethnicity, age distribution, parental nativity, home ownership, residential mobility, type of residential area, and region of residence.