This paper analyzes the heterogeneous effects of monetary policy on workers with differing levels of labor force attachment. Exploiting variation in labor market tightness across metropolitan areas, we show that the employment of populations with lower labor force attachment—Blacks, high school dropouts, and women—is more responsive to expansionary monetary policy in tighter labor markets. The effect builds up over time and is long-lasting. We illustrate these results in a New Keynesian model with heterogeneous workers and conclude that a hawkish monetary policy especially hurts the employment prospects of workers with lower labor force attachment.