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The purpose of this research is to answer problems regarding leadership contributions and organizational commitment to the work performance of school principals and high school teachers in Medan. Population In this study, there were 1417 principals and high school teachers in Medan City. Technique Sampling was carried out by purposive cluster sampling with a total of 303 samples. The research instrument uses a Likert scale. Research data is processed and analyzed through path analysis. The results of the research data analysis show that there is a contribution of leadership and organizational commitment of school principals and teachers to work performance with a path coefficient of 0.2481. Based on the results of data analysis obtained: (1) Leadership patterns and organizational commitments of the school principal and teacher contribute to increased work performance, through the existing presence of attention, guidance, exemplary, motivation, and inspiration. (2) The leadership pattern and commitment organization can contribute to job satisfaction that supports work performance, through work earnestness hard, working sincerely, working hard without expecting a reward, pride in work, and a sense of responsibility for the job (3) Leadership pattern and commitment of the organization contribute to work performance achievements which can be seen from responsibility, self-congruence, trust in the organization, and organizational loyalty. To improve the work performance of schools and teachers, an effective leadership pattern and optimal organizational commitment are needed.