Purpose: This study will examine the school principals' ethical decision-making processes and to explore gender-related differences. Design/methodology/approach: This study employed a mixed-method research design, combining qualitative and quantitative approaches. Data were collected through semi-structured in-depth interviews with a sample of 10 male and 10 female principals, who were presented with ethical dilemma scenarios. The qualitative component utilized a phenomenological analysis, while additional quantitative analyses were performed on the same dataset to explore gender-related differences. Findings: Our analysis of principals' ethical evaluations identified three key areas where gender-related differences were evident: decision-making approaches, leadership styles, and philosophy/value orientations. The analysis revealed that women more frequently employed personal approaches, while men favored institutional approaches in their ethical evaluations. Secondly, men tended to adopt a democratic style, while women leaned towards an autocratic style. Finally, men exhibited a relativist orientation, while women displayed an idealist orientation in their ethical decision-making processes. Originality/value: Gender-based analysis of school principals' ethical decision-making process has remained an under-researched area. This study contributes to the understanding of gender-related differences in principals' ethical decision-making processes.