Introduction:: Avulsion fractures of tibial tuberosity are rare and account for 3% of all epiphyseal injuries. This retrospective study was done to assess clinical and radiological outcome of these injuries in Brunei Darussalam. Materials and Methods:: Fourteen patients who were treated for tibial tuberosity avulsion fracture in Raja Isteri Pengiran Anak Saleha (RIPAS) Hospital between 2010 to 2020 were assessed clinically and radiologically. Patient’s age, gender, mechanism of injury, side involved, and treatment and any complication of treatment were recorded. Fractures were classified using the Ogden classification. Results:: All 14 patients were adolescent males whose fractures resulted from landing from a high jump, jogging, running or sprinting during football or kicking during sepak takraw and wushu. All fractures were treated by open reduction and internal fixation. Outcome was rated as excellent in 8 and fair in 6 patients due to residual pain from prominent screw or limitation of movements. No significant difference was found in the outcome of patients between different fracture types. Conclusion: Tibial tuberosity avulsion fractures are rare. Satisfactory outcome was consistently obtained by open reduction and internal fixation. Few patients had residual problems but this did not have any negative impact on their outcome.