<p>In previous studies, children and adolescents who were bullied were less likely to endorse a belief that their world is just. Few studies have expanded this work to include the impact of victimization apart from power-imbalanced bullying dynamics. Even fewer studies have examined victimization and general just-world belief. The current work investigates school victimization and just-world belief across three samples of Brazilian children and adolescents. Study 1 included responses from 17,414 students from 122 different schools in 2018. Study 2 surveyed 2,184 students in 2019. Study 3 included data from 356 students from one school in 2018. Data from Study 1 and Study 2 were analyzed in a multilevel model, while Study 3 was analyzed using hierarchical regression. Across all three studies, students who reported more victimization reported lower personal just world belief, or found their personal world less just. In Study 3, students who reported higher victimization reported lower general just world belief, or found the world overall to be less just. These results support the association between lived experiences and just-world beliefs, providing additional evidence of the connection between just-world beliefs and the individual’s reality, as shaped by their experiences. In school settings, findings from this work suggest that students experiencing victimization need support reconciling these experiences with justice in their lives and the world around them.</p>