Concord-Carlisle Regional High School is a public high school located in Concord, Massachusetts, USA, 17 miles (27 km) northwest of Boston. The school serves grades 9–12, and as part of the Concord-Carlisle Regional School District, has students from both Concord and Carlisle, Massachusetts. The school also has a notable portion of minority students from Boston (particularly Dorchester, Roxbury, and Mattapan) enrolled as part of the METCO program. Concord-Carlisle Regional High School is widely regarded as one of the top public high schools in the state, with the September 2009 issue of Boston Magazine rating CCHS the number one public high school in cost efficiency and third in academic performance in eastern Massachusetts.