Child gun deaths hit a record high in 2021, breaking the previous record set just one year before, new research finds. A total of 4,752 children in the U.S. died gun-related deaths in 2021, a new study found using Centers for Disease Control and Prevention (CDC) data. This is an 8.8 percent increase in the pediatric gun mortality rate for 2020 and a staggering 41.5 percent increase from 2018.