In the pursuit of a just and equitable society, the role of education is vital. One of the key determinants of this success lies in the quality of leadership within educational institutions. The study aims to analyze the multifaceted impact of leadership characteristics, bias mitigation (BM) efforts, and community engagement (CE) on academic achievement (AA) within the school context. This article aims to examine the sociological impact of leadership in schools and its direct influence on promoting equality and ensuring the success of all students. The study employed a mixed-method research approach, utilizing structured questionnaires and interviews to collect data from diverse stakeholders, including 26 school leaders, 154 educators, 1,750 students, and 32 community members across 7 purposively selected schools. PLS-SEM statistical analysis techniques were employed to analyze the collected data. The findings suggest that inclusive and equity-focused leadership is positively correlated with higher academic achievement among diverse student populations. Mitigating biases among educators enhances educational outcomes. Community engagement by school leaders enhances fairness in the education system. Based on the existing body of knowledge, this research contributes by validating the critical role of inclusive leadership in enhancing AA across diverse student populations. It innovates by integrating strategies to mitigate biases among educators and promoting active CE as novel approaches to bolster equitable educational outcomes. The implications of policymakers prioritizing leadership training in diversity and equity include schools adopting bias awareness programs and enhancing community partnerships to improve educational equity and student support.