In 2011, approximately 663,000 children experienced maltreatment (nine per 1,000 children). 40% of these children were younger than 5, and 72% were younger than 11. While the overall population of children ages 0 to 4 remained constant, this group's representation among maltreated children rose by 11% between 2004 and 2011. As early experiences play a pivotal role in children's development, experts find this trend troubling. The highest maltreatment rates were in Arizona, Oklahoma and South Dakota, where 48% of children under 5 were maltreated.
See the Child Abuse and Neglect section of the KIDS COUNT Data Center for national and state data, as well as for the District of Columbia: