Cyberbullying is rapidly increasing in South Korea. The present article reviews research on factors associated with cyberbullying perpetration and victimization in South Korea. Study findings suggest a number of factors within individual, family, peer, and school levels. Relations with parents, parental verbal abuse, and a lack of attachment are related to perpetration. Delinquent peer association is positively associated with perpetration and victimization, and students’ school satisfaction is negatively associated with this victimization. Adolescents’ use of social networking sites and social media and lack of rules in cyberspace are found to increase perpetration and victimization. Research and practice implications are discussed.