Chelmsford High School, established in 1927, is the public high school serving students in grades 9 through 12 in Chelmsford, Massachusetts. Situated on over 50 acres, it is part of a central campus that includes McCarthy Middle School, Parker Middle School, and Harrington Elementary School. The school operates on a three-house system, with houses named after renowned New England writers: Ralph Waldo Emerson, Nathaniel Hawthorne, and John Greenleaf Whittier. This structure fosters a sense of community and provides tailored support to students. Chelmsford High School offers a comprehensive curriculum, including a dual enrollment program in partnership with Middlesex Community College. This program allows students to earn college credits in 32 different courses taught on the CHS campus. In the 2023-2024 school year, there were 586 total course enrollments in this program. The school boasts a strong record of academic achievement. In the 2024 National Merit Scholarship Program, 18 students were recognized as Commended Scholars, with one Semi-Finalist and one Finalist. Additionally, 26 seniors were awarded the Seal of Biliteracy, representing proficiency in seven languages. Beyond academics, CHS offers a wide array of extracurricular activities, including numerous clubs and a robust athletics program. The school's mascot is the Lion, and its colors are maroon and white. Chelmsford High School is committed to providing a supportive and challenging environment, preparing students for success in higher education and beyond.