Phillips Academy, also known as Andover, is a private, co-educational, boarding-and-day, college-preparatory school located in Andover, Massachusetts, near Boston. It is the oldest incorporated academy in the United States, having been founded in 1778. The school enrolls approximately 1,150 students in grades 9 through 12, including postgraduate students. It is part of the Eight Schools Association and the Ten Schools Admission Organization.