This current research study was designed to study relationship between principals’ leadership styles and teachers’ organizational commitment with moderating role of emotional intelligence and perceived organizational support. This research study was conducted in three districts of Southern region of Khyber Pakhtunkhwa, Pakistan. All principals and teachers in public sector schools and private sector school were taken as population of the study. However, 150 principals and 600 teachers were selected as sample size. Convenient and random sampling technique was used. Standardized research instruments were used for data collection. Total 8 null hypotheses were formulated. Correlation coefficient, regression analysis, mean score comparison and t-test were used. Only one hypothesis was accepted and 7 hypotheses were rejected. Significant relationship was found between principals’ leadership styles and teachers’ organizational commitment. Significant difference was found between public school principals and private school principals regarding dominant leadership style. Public school principals were inclined to democratic leadership style while private school principals were inclined to autocratic leadership style. Teachers of public school were more committed to profession and to institution while private school teachers were more committed to teaching. Significant relationship was determined between principals’ leadership styles and emotional intelligence. It was also found that public school teachers received more support from principal and from other colleagues than private school teachers. Result declared that principals’ emotional intelligence significantly and positively moderate relationship between principals leadership styles and teachers’ organizational commitment. It was also concluded from result that organizational support significantly and positively moderate relationship between principals’ leadership styles and teachers’ organizational commitment at secondary school level.