Each afternoon across the U.S., 15 million children are alone and unsupervised after school. The parents of 18 million would enroll their children in an afterschool program, if one were available. These are some of the key findings from the nation's most in-depth study of how America's children spend their afternoons. The 2009 report, conducted for the Afterschool Alliance, surveyed nearly 30,000 households across the United States. In New Jersey, 574 households were surveyed for this study. This paper identifies New Jersey's supply of and demand for afterschool programs, as well as the major barriers to its program enrollment. [Funding for this state report was provided by the JCPenney Afterschool Fund. For the main report, "America After 3PM: The Most In-Depth Study of How America's Children Spend Their Afternoons," see ED506748.]