The Changing Face of America's Adolescents - Statistics on numbers, age and gender, race and ethnicity, socioeconomic status, and geographic location. From the U.S. Dept. of Health and Human Services.
Child Trends - Research and data covering topics such as health, education, poverty, families, and development.
Children's Defense Fund - Reports, data, and archives on the state of children in America today.
National Center for Children in Poverty - Data, publications, and more about the more than 15 million American children living in poverty. From Columbia University's Mailman School of Public Health.