This study assessed the managerial skills, leadership styles, and leadership behavior of school administrators in Congressional District II of Cagayan Province and their correlation with teachers’ performance. Twenty school administrators and 249 senior high school teachers participated. Most administrators were male, aged 59 and above, with doctoral or ongoing master’s degrees. They rated themselves very high in managerial skills and leadership styles, particularly in shared leadership (mean = 4.77), and high in leadership behavior, with situational leadership scoring the highest. No significant differences were found in these areas across demographic variables. Human and technical skills, emotional intelligence, and shared leadership were positively correlated with teachers’ performance. Transformational and relational leadership behaviors also showed significant positive correlations. The study concludes that effective managerial and leadership competencies of administrators contribute to better teacher performance. Implications suggest that targeted leadership development programs should enhance these competencies to sustain and improve educational outcomes in senior high schools.