The Eight Schools Association (ESA) is a group of large private college-preparatory boarding schools in the Northeastern United States. It was formally established in 2006, but has existed in some form since the 1973–74 school year. Although several ESA schools no longer publish their endowment figures, in 2016 the ESA contained seven of the ten wealthiest traditional college-preparatory boarding schools in the United States, as measured by total size of endowment. All eight ESA members commit to provide financial aid equivalent to the full demonstrated need of the U.S. citizen students that they admit, as determined by the schools' respective financial aid departments.