This study examines leadership styles, motivational factors, and employee productivity in manufacturing firms in Delta and Edo States, Nigeria. Specifically, the study investigated the effect of autocratic leadership style, democratic leadership style, intrinsic motivation, and extrinsic motivation on employee productivity. Four research questions were posed and four hypotheses were formulated to guide the study. A descriptive survey research design was adopted, with a population of 3,280 employees drawn from selected manufacturing firms in the two states. A sample size of 357 respondents was determined using Yamane's sampling technique; 293 copies were retrieved and analyzed. Data analysis involved descriptive and inferential statistics, including mean, standard deviation, and multiple regression analysis. Findings revealed that while autocratic leadership style did not significantly affect employee productivity, democratic leadership style had a positive and significant effect (p < 0.05 = 0.0415). Both intrinsic and extrinsic motivation significantly influenced employee productivity (p < 0.05 = 0.0000). Intrinsic motivation exhibited a stronger effect on productivity compared to extrinsic motivation, emphasizing the importance of internal satisfaction derived from challenging tasks, skill utilization, and recognition of effort. The regression analysis demonstrated a high explanatory power, with an R² value of 0.9936, indicating that leadership styles and motivational factors collectively accounted for 99.36% of the variation in employee productivity. The study concludes that fostering participatory leadership and enhancing both intrinsic and extrinsic motivation are essential for improving employee productivity in manufacturing firms. Recommendations include adopting democratic leadership practices, recognizing employee contributions, providing competitive monetary rewards, and implementing comprehensive leadership training programs.