Hanover High School is a public school located in Hanover, Massachusetts, United States. It encompasses grades 9-12. Hanover High is a continuation for Hanover Middle School, and before that either Sylvester/Center School or Cedar School. The original Hanover High School building was opened in 1958. The first graduating class was 1959. Sylvester School formerly served as the high school. The current Hanover High School building was opened in 2011.