We use administrative data from the U.S. Census to estimate the effect of female director representation on workplace gender diversity and women’s earnings. Using a difference-in-differences estimator that correctly accounts for variation in treatment timing, we show that first-time female director appointments lead to subsequent increases in workplace gender diversity. We find that the effects are driven by the improved retention of female workers in the middle and upper quartiles of the firm’s overall earnings distribution. We find suggestive evidence that the effects are due to the newly appointed female directors’ influence on corporate policy, as we observe stronger effects when the director is placed on one of the board’s three core committees.