This study examined the impact of bullying on students' academic performance in selected schools in Kyegegwa District, Uganda. Using a mixed-methods design, the study targeted 320 students, 24 teachers, and 10 school administrators drawn from six secondary schools. Stratified random sampling was employed to select 178 respondents. Data were collected through structured questionnaires, interview guides, and observation checklists. The study found that bullying in its physical, verbal, cyber, and relational forms was prevalent in all the sampled schools and had significant negative effects on students' academic performance, school attendance, concentration, and psychological well-being. The results revealed that bullied students were more likely to exhibit declining grade point averages, increased absenteeism, and reduced participation in academic activities. The study concluded that bullying constituted one of the most pervasive barriers to quality education in Kyegegwa District and recommended urgent implementation of anti-bullying policies, peer counselling programmes, and teacher training in conflict resolution.