This article presents estimates of the elasticity of supply of labor to child care. This parameter is an important determinant of the effects of child-care subsidies and regulations on the cost of child care. Using data from the Current Population Survey, there is evidence of an elasticity in the range of 1.2-1.9. This implies that the majority of the benefits of child-care subsidies accrue to consumers of child care. It is also consistent with the fact that child-care workers' wages remained flat in real terms in recent years, despite rapid growth in the demand for child care. Copyright 1993 by University of Chicago Press.