This study investigates the impact of workplace diversity on organizational performance, focusing on four key areas: innovation, decision making, employee retention, and customer reach. Using a mixed-methods approach, data were collected through structured surveys and semi-structured interviews across multiple organizations. Quantitative analysis, including chi-square tests, revealed statistically significant relationships between diversity and all four performance indicators. Qualitative insights further supported the positive influence of inclusive practices on team effectiveness and market responsiveness. The findings suggest that diversity is a critical driver of business success. Organizations that embrace and manage diversity effectively are more likely to achieve sustainable performance outcomes.