This study aimed to reveal the degree of practice of transformational leadership dimensions among secondary school principals in Haifa District in the Palestinian interior, and its relationship to the level of job satisfaction among teachers. The study adopted a correlational descriptive research methodology. The study population consisted of all secondary school teachers in Haifa District in the Palestinian interior, numbering (3287) teachers, the study sample consisted of (410) teachers. The results showed that the degree of practice of transformational leadership dimensions among secondary school principals in Haifa District in the Palestinian interior was highly, the first of which was perfect effect dimension (4.07), followed by individual considerations dimension (4.06), followed by intellectual arousal dimension (4.01), and in last place inspirational stimulation (3.92). The results also showed that there were statistically significant differences due to the variable of academic qualification, where the differences came in favor of the "bachelor's" category, and there were statistically significant differences due to the variable of years of experience, where the differences came in favor of the category "less than 5 years". The results also showed that the level of Job satisfaction among teachers came at a high level in all its dimensions, the first of which was the nature of work dimension (3.86), and then security and job stability dimension (3.80), followed by the principal's relationship with teachers dimension (3.73) and in last place physical aspects dimension (3.68), and the results showed that there were no statistically significant differences due to the gender variable, and there were statistically significant differences for the experience variable, and the differences came in favor of the category of "10 years and more", and the presence of statistically significant differences for the variable of academic qualification and the differences came in favor of the category of "graduate", and the results showed a positive correlation between transformational leadership among principal and job satisfaction among teachers.