Although it is widely acknowledged that high-skilled teachers are integral to service quality and young children's well-being in child care settings, little is known about the qualifications and skills of the child care workforce. This paper combines data from multiple sources to provide a comprehensive assessment of the quality of individuals employed in the child care sector. I find that today's workforce is relatively low-skilled: child care workers have less schooling than those in other occupations, they score substantially lower on tests of cognitive ability, and they are among the lowest-paid individuals in the economy. I also show that the relative quality of the child care workforce is declining, in part because higher-skilled individuals increasingly find the child care sector less attractive than other occupations. Furthermore, I provide evidence that at least three other factors may be associated with the decline in worker quality. First, the recent proliferation of community college programs offering child care-related certificates and degrees may divert students away from attending four-year schools. Second, those majoring in child care-related fields are negatively selected for their cognitive skills, thereby decreasing the quality of the child care labor pool. Third, I show that the increased availability of outside employment options for high-skilled women had a detrimental effect on the quality of the child care workforce.