The purpose of this study was to find out the impact of board diversity and gender composition on CSR performance and firm reputation. This study also revealed the role of CSR performance as a mediator in the impact of board diversity, gender composition, and firm reputation. Samples were chosen from companies awarded Indonesia’s Best Wealth Creator Award for year 2010–2012 by SWA Magazine, Indonesia, using purposive sampling. This study showed that CSR performance and gender composition had positive impact on firm reputation but did not significantly impact board diversity.