Parent training is an intervention in which parents learn strategies to promote changes in their children's behavior. Parent training is effective in treating children's disruptive behaviors, which increase children's risk for future violence and aggression, and in treating parental violence, aggression, and maltreatment of their children. The effects are robust across a wide range of family characteristics, cultural groups, settings, and delivery methods. However, availability and access to evidence‐based parent training remains limited. Translational research is needed to identify optimal ways to increase widespread adoption, successful implementation, sustainability, and accessibility for families.