Number of Children in the United States
"According to the 2010 census, there were 74.2 million children in the United States, 1.9 million more than in 2000. This number is projected to increase to 87.8 million in 2030. There were approximately equal numbers of children in three age groups: 0–5 (25.5 million), 6–11 (24.3 million), and 12–17 (24.8 million) years of age in 2009 (the latest data year available by age at time of publication)."
Federal Interagency Forum on Child and Family Statistics, "America’s Children: Key National Indicators of Well-Being, (Washington, DC: U.S. Government Printing Office, 2011), p. xiv.