Chelmsford High School is a public high school founded in 1917. The current building is located in North Chelmsford, Massachusetts, United States, and was built in 1974. Before 1974 the high school was located in the current McCarthy Middle School building.
Serving 1,402 students in grades 9-12, Chelmsford High School ranks in the top 10% of all schools in Massachusetts for overall test scores (math proficiency is top 20%, and reading proficiency is top 20%).
The percentage of students achieving proficiency in math is 67% (which is higher than the Massachusetts state average of 42%). The percentage of students achieving proficiency in reading/language arts is 79% (which is higher than the Massachusetts state average of 44%).
The student-teacher ratio of 14:1 is higher than the Massachusetts state level of 12:1.
Minority enrollment is 38% of the student body (majority Asian), which is lower than the Massachusetts state average of 49% (majority Hispanic).
Quick Facts (2026)
- Grades: 9-12
- Enrollment: 1,402 students
- Student-Teacher Ratio: 14:1
- Minority Enrollment: 38%
- Graduation Rate: 97% (Top 10% in MA)
- Overall Testing Rank: Top 10%
- Math Proficiency: 67% (Top 20%)
- Reading Proficiency: 79% (Top 5%)
- Science Proficiency: 68% (Top 20%)
- Source: National Center for Education Statistics (NCES), MA Dept. of Education
Top Rankings
Chelmsford High School ranks among the top 20% of public schools in Massachusetts for:
Category
Attribute
Overall Rank
Math Proficiency
Reading/Language Arts Proficiency
Science Proficiency
Graduation Rate
School Overview
Chelmsford High School's student population of 1,402 students has stayed relatively flat over five school years.
The teacher population of 100 teachers has stayed relatively flat over five school years.
Grades Offered
Grades 9-12
(Supplemental Virtual)
(Supplemental Virtual)
Total Students
1,402 students
Total Classroom Teachers
100 teachers
Year Founded
1917
School Calendar
Campus Size
50 acres
School Motto
We think forward...
School Rankings
Chelmsford High School ranks within the top 10% of all 1,626 schools in Massachusetts (based off of combined math and reading proficiency testing data).
The diversity score of Chelmsford High School is 0.57, which is less than the diversity score at state average of 0.66. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#109 out of 1626 schools
(Top 10%)
(Top 10%)
Math Test Scores (% Proficient)
67%
42%
Reading/Language Arts Test Scores (% Proficient)
79%
44%
Science Test Scores (% Proficient)
68%
44%
Student-Teacher Ratio
14:1
12:1
American Indian
n/a
n/a
Asian
19%
8%
Hispanic
10%
26%
Black
5%
10%
White
62%
51%
Hawaiian
n/a
n/a
Two or more races
4%
5%
All Ethnic Groups
Graduation Rate
97%
90%
Participates in the National School Lunch Program (NSLP)
Yes
Eligible for Free Lunch
9%
34%
Eligible for Reduced Lunch
3%
4%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), MA Dept. of Education
School Notes
- School Mascot: Lion
Frequently Asked Questions
What is Chelmsford High School's ranking?
Chelmsford High School is ranked #109 out of 1,626 schools, which ranks it among the top 10% of public schools in Massachusetts.
What schools are Chelmsford High School often compared to?
Chelmsford High Schoolis often viewed alongside schools like Tewksbury Memorial High School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
67% of students have achieved math proficiency (compared to the 42% MA state average), while 79% of students have achieved reading proficiency (compared to the 44% MA state average).
What is the graduation rate of Chelmsford High School?
The graduation rate of Chelmsford High School is 97%, which is higher than the Massachusetts state average of 90%.
How many students attend Chelmsford High School?
1,402 students attend Chelmsford High School.
What is the racial composition of the student body?
62% of Chelmsford High School students are White, 19% of students are Asian, 10% of students are Hispanic, 5% of students are Black, and 4% of students are Two or more races.
What is the student-teacher ratio of Chelmsford High School?
Chelmsford High School has a student ration of 14:1, which is higher than the Massachusetts state average of 12:1.
What grades does Chelmsford High School offer ?
Chelmsford High School offers enrollment in grades 9-12 (Supplemental Virtual).
What school district is Chelmsford High School part of?
Chelmsford High School is part of Chelmsford School District.
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