Worcester Academy is an independent coeducational preparatory school in Worcester, Massachusetts in the United States. Sited on 67 acres (270,000 m²), the school is divided into a middle school, serving approximately 150 students in grades six to eight, and an upper school, serving approximately 500 students in grades nine to twelve, including some postgraduates. Approximately one-third of students in the upper school participate in the school's five- and seven-day boarding programs.