Abuse in dating relationships is common among adolescents. Dating abuse has a plethora of negative associated conditions or consequences. Despite the high prevalence rates and deleterious effects, however, teen dating abuse has been slow to gain recognition as a critical public-health and policy concern. Adult intimate-partner violence and marital abuse more generally have gained such recognition, as seen, especially in the past three decades, in policy, program, and legal responses, and in an extensive research literature base devoted to the problem. Adolescents, by comparison, were long overlooked as a population that suffers from relationship abuse. This book assesses and reviews research in teen dating violence.