New Jersey has a curious status regarding school desegregation. It has had the nation's most venerable and strongest state law prohibiting racially segregated schooling and requiring racial balance in the schools whenever feasible. Yet, it simultaneously has had one of the worst records of racially imbalanced schools. Against the legal and historical backdrop, this study explores demographic changes in New Jersey schools from 1989 to 2010, based on federal data from the National Center for Education Statistics. It utilizes measures such as the concentration of students of color, and the exposure of a student of one race to students of another, to examine the presence of segregation in schools throughout the state. First, this report begins with an examination of the history of school segregation in the state of New Jersey. It then progresses to a review of studies pertaining to school segregation and its effects on students. Following this is a presentation of findings based on available enrollment data for New Jersey schools at the state level, more specifically the major metropolitan areas encompassing North and Central Jersey and South Jersey, along with a discussion of these results. Finally, a policy recommendation section evaluates the actions available to community members, activists, and legislators at the local, state, and national levels. Appended to the report are: (1) Additional Data Tables; and (2) Data and Methodology. [This report was written with John Kucsera, Gary Orfield, Jennifer Ayscue, and Genevieve Siegel-Hawley. This is the fourth of thirteen in a series of special reports on public school segregation in Eastern states. These studies explore trends in enrollment and school segregation patterns from 1989 to 2010 at the state and regional levels, including various metro areas for each state.]