From 1990 to 2010, inequality in the United States increased in many ways. This report shows that the income, wealth, and educational attainment of residents in the most privileged neighborhoods in the United States escalated rapidly over these two decades. Meanwhile, residents of the most disadvantaged neighborhoods gained little; many of these neighborhoods grew poorer. As a result, inequality between top and bottom neighborhoods intensified in the great majority of commuting zones. Even where inequality dropped, the story was not always positive: it often occurred because top-neighborhood incomes fell in the wake of economic stagnation.