Chelsea Opportunity Academy
Alternative · Grades 9–12 · 132 students
Chelsea High
299 Everett Avenue, Chelsea, MA 02150
Grades
9–12
High
Students
1,649
Enrolled 2024–25
Students per teacher
13.1 : 1
Full-time teachers
District
Chelsea
Suffolk County
Schola Grade D · Below average
Letter grade (A–F) · compared with 322 Massachusetts high schools · How we grade
Percentiles compare this school with other Massachusetts high schools; the line marks the middle. Data: test scores 2021–22, graduation and absenteeism 2022–23 (U.S. Department of Education, EDFacts); coursework 2023–24 (Civil Rights Data Collection); staffing 2024–25 (NCES).
About Chelsea High
Chelsea High is a public high school in Chelsea, Massachusetts, serving grades 9–12. It is part of Chelsea. The school is located in a large suburb in Suffolk County.
In the 2024–25 school year, 1,649 students were enrolled, with about 13.1 students for every full-time teacher. That ratio is larger than the typical Massachusetts high school (11.0 students per teacher). Its Schola Grade is D (below average), compared with 322 Massachusetts high schools.
Grades & enrollment
Students per grade, 2024–25Grades 9–12
Location & nearby schools
School details
- Type
- Public School · What this means
- Level
- High
- Grades offered
- 9–12
- Enrollment (2024–25)
- 1,649 students
- Students per teacher
- 13.1 to 1
- AP courses offered
- 15
- Charter school
- No
- Magnet school
- No
- Locale
- Suburb — Large
- School district
- Chelsea
- County
- Suffolk County
- NCES school ID
- 250354000482
Schools near Chelsea High
All 13 schools in Chelsea →
Phoenix Academy Charter Public High School Chelsea
Charter · Grades 9–12 · 198 students
Seaport Academy
Private · Grades 8–12 · 24 students
Chelsea Virtual Learning Academy
Public · Grades 8–12 · 54 students
Everett High
Public · Grades 9–12 · 2,307 students
East Boston High School
Public · Grades 7–12 · 1,252 students
School data comes from the U.S. Department of Education: the National Center for Education Statistics (NCES) Common Core of Data and EDGE school locations (2024–25) and Private School Survey (2023–24), the Civil Rights Data Collection (2023–24), and EDFacts (test results 2021–22; graduation and chronic absenteeism 2022–23), plus other public sources. Please contact the school to confirm enrollment, programs, and other details. How we source data.