The purpose of this study was to explore the impact of leadership styles on job satisfaction among teachers in selected secondary schools in Monduli district. The study hypotheses were that H1 there is no statistically significant correlation between transformational leadership style and job satisfaction among teachers in selected secondary schools in Monduli district, H2 there is no statistically significant correlation between transactional leadership style and job satisfaction among teachers in selected secondary schools in Monduli district and H3 there is no statistically significant correlation between laissez-faire leadership style and job satisfaction among teachers in selected secondary schools in Monduli district. The study employed a descriptive survey design. A sample size of one hundred twenty-nine respondents was randomly chosen from four secondary schools in Monduli namely; Manyara, Lowassa, Engutoto, and Irkisongo district secondary schools. A self-administered questionnaire was used to collect information from respondents. The collected data were analyzed by Statistical Package for Social Scientists (SPSS) using, Independent t-test and Fisher's Analysis of Variance (ANOVA) to determine whether demographic variables varied with students' academic performance. Karl Pearson's Linear Correlation Coefficient was undertaken to determine the relationship between leadership styles and teachers' Job satisfaction. The study results indicated that hypotheses H1 and H3 were supported by the study findings. However, the study findings revealed that H3 was not supported by the study findings. The study concluded that transformational and laissez-faire leadership styles had a direct influence on teachers' job satisfaction. Therefore, school administrators in the Monduli district should use transformational and laissez-faire leadership styles in their day-to-day administration. The study findings led the researcher to recommend that, the school administration should focus on the use of transformational and laissez-faire leadership styles since they had a direct significant influence on teacher's job satisfaction. For future research focus should be on obtaining a larger and more representative sample, conducting the same study in other schools from another district for comparison purposes, and replicating the study using a qualitative approach.