This study examined the impact of leadership style on employee productivity in deposit money banks in Port Harcourt. The study used a five-point Likert scale questionnaire consisting of twenty-five questions covering transformational, transactional, and democratic leadership styles and employee productivity variables. The questionnaire was deployed to one hundred and fifty-three respondents (153) and received one hundred and twenty-five (125) valid responses. Statistical Package for the Social Sciences (SPSS) was used to analyze respondent responses. Results affirm the validity and reliability of research findings. The results of the descriptive and regression analysis indicate that the transformational leadership style is the most predominant in Nigerian Deposit Money Banks followed by transactional and democratic leadership styles. The study concludes that leadership styles significantly influence employee productivity albeit different leadership styles have varying effects on employee productivity and varying leadership styles can co-exist within the same organization.