This study investigated a correlational study among leadership behavior, cohesiveness, team building and success in team performance of the Amhara Region National League Men’s Football Clubs. A correlational design was employed as a research design. The Leadership in Sport Scale and the Group Environment Amharic version questionnaire, known for their validity and reliability, were used. The study participants included a sample of 297 participants selected through the census sampling method. Frequency, percentage, correlation, and multiple linear regression analyses (with a significance level of P < 0.05) were performed. There was a correlation between most coaches' leadership styles and team cohesion. One of the most striking findings is the strong positive correlation (r = .482) between training and instruction and Individual attraction to Group (Task). In contrast, the strong negative correlation (r = -.485) between autocratic behavior and individual attraction to a group (Task) suggests a negative relationship. Furthermore, multiple linear regression revealed that the five predictors collectively explained up to 70% of the variance in team cohesion (5, 274) = 12.504, p<.001). Individual predictor analysis indicated that training and instruction (β =. 482, t = 6.913, p < .001), and Positive Feedback (β = .350, t = 9.077, p < .001), have a positive impact on team cohesion. On the other hand, Autocratic Behavior (β = -.354, t = 6.380, p < .001) negatively affected team cohesion. This study found that leadership styles significantly influence team cohesion in the Amhara National Football League. Effective training and instruction positively impact team unity, while autocratic leadership negatively affects it. These factors and positive feedback, accounted for 70% of the variance in team cohesion. Coaches should prioritize effective training & instruction to create a positive team environment that promotes unity and, ultimately, improved performance. Conversely, autocratic leadership styles may hinder team cohesion and team building negatively influence team dynamics and success of the team