This study analyzes the relationship among high school students' tendencies toward violence, self-esteem, and competitive attitudes. It was conducted in Fethiye, Muğla, between September 2013 and January 2014. The population of the study consisted of 6,531 students from 11 high schools. The participants were determined using stratified random sampling, and the study data were collected from 1,600 students. A personal information form, the Violence Tendency Scale, the Competitive Attitude Scale, and the Coopersmith Self-Esteem Scale were used as data collection tools. In this study, the rate of the participants who were exposed to violence was 15.4%. Of them, 46.2% said that one of their family members was violent toward them, while 27.3% said that their teachers had been violent toward them. Of the participants that were exposed to violence, 55.8% reported psychological violence, 27.3% reported physical violence, and 10.8% reported sexual violence. In the study, tendency toward violence is a dependent variable, while competitive attitude and self-esteem are independent variables. Family type, exposure to violence, and demographics are control variables. Age, class, school, family attitude, and exposure to violence are the variables that created significant differences in the tendency for violence. The present study showed that there was an inverse and weak yet significant relationship between the students' tendencies toward violence and competitiveness ( r = -.169), and a positive and weak relationship between tendency toward violence and self-esteem ( r = .238). Also, there was an inverse and low-level significant relationship between competitiveness and self-esteem ( r = -.121). The variables which affect the tendency toward violence are gender, exposure to violence, competitiveness, age, self-esteem, and extended family type in a descending order regarding their importance. The predictive power of the variables on the tendency toward violence was 16.8%, which is not statistically significant.