Research summarized in this report reveals that 45% of children in the US have experienced at least one adverse childhood experience. Economic hardship and parental divorce or separation are the most common, both nationally and in almost every state. The prevalence of other adverse childhood experiences (including parental incarceration, parental death, and other experiences) varies by state and by race and ethnicity. Black and Hispanic children are more likely than white children to have had at least one adverse childhood experience.