Chatham High School is a public high school located in Chatham, Massachusetts, United States. It serves the town of Chatham and the neighboring town of Harwich for students in grades 9-12. It is part of the Monomoy Regional School District.
The school offers a comprehensive curriculum including college preparatory, vocational, and special education programs. Extracurricular activities include a variety of sports teams, clubs, and student organizations. Chatham High School participates in the Massachusetts Interscholastic Athletic Association (MIAA). The school mascot is the Blue Heron.