A childcare supply issue received national attention with the passage of Childcare and Development Block Grant Reauthorization Act of 2014. Although Head Start programs may be strategically placed in areas with a potential childcare supply gap, their role in addressing the gap has not been explored in the literature. Using various publicly available aggregate data for New Jersey, this study examined if and to what extent the availability of Head Start programs helped mitigate a supply gap of center-based childcare in the school districts. Our results showed that Head Start availability was related to 84% reduced odds of having a severe childcare supply gap in New Jersey and that it played a significant role in reducing a severe supply gap of center-based childcare. Having a larger population size and a higher per-capita annual income were also important protective factors of a severe childcare supply gap. (author abstract)