This analysis of data from the Global School-based Student Health Survey examined the prevalence of bully victimization in middle-school students in 19 low- and middle-income countries and also explored the relationship between bullying, mental health and health behaviors. In most countries, boys were more likely than girls to report being bullied and the prevalence of bullying was lower with increasing age. Students who reported being bullied in the past month were more likely than non-bullied students to report feelings of sadness and hopelessness, loneliness, insomnia and suicidal ideation. Bullied students also reported higher rates of tobacco use, alcohol use, drug use and sexual intercourse.