Growth in the number of children in immigrant families during the 2000s offset the decline in children with native-born parents. Between 2000 and 2009, the minority share of U.S. children under age 18 increased from 38 to 44 percent, driven by growth in the number of Hispanic and non-Hispanic Asian children and a decline in non-Hispanic white children. While the increase in minority children included children with foreign-and native-born parents, children of immigrants accounted for most of the growth. This brief highlights important trends in the changing demographics of the U.S. child population nationally and across states.