Diversity-related factors, such as cultural differences, gender and age, and can either enhance or hinder an organization’s ability to achieve its strategic goals, foster inclusivity, and maximize overall performance. The main objective of this study is to ascertain the effect of workplace diversity on organizational performance: A study of Miva rice Makurdi.  A cross-sectional survey design was used in this study. In view of the size of the population, this study adopts census population of 150 elements and questionnaire was the instrument for data collection. Regression was used in testing the formulated hypotheses and study found that age diversity and gender diversity has a positive significant effect on organisational performance of Miva rice. The study concluded that management of Miva Rice Makurdi should prioritize strategies that enhance age and gender diversity. The study recommended that Management of Miva Rice Makurdi should continue to encourage the inclusion of different age and gender groups in its workforce. This can be done by implementing mentorship programmes that allow experienced employees to guide younger ones and by fostering a workplace that values both fresh ideas and seasoned expertise.