Below Average
#1361 of 1,793 schools in MA
Chelsea High
High School · Chelsea · Chelsea, MA
A high school in Chelsea, MA where students score 7 points above what's typical for similar communities.
299 Everett Avenue, Chelsea, MA 02150
- Math 19% vs MA 46% (2025)
- Reading 21% vs MA 52% (2025)
- 75.0% 4-year graduation
Academics
Full Profile · 4/4 metricsView breakdown
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Students at Chelsea High score 20% proficient, which is above what's typical for similar communities (expected: 13%).
2025 MCAS proficiency
Most recent published year. School vs. MA average.
Trend
↓ DecliningProficiency has fallen 10 points since 2022, to 20% in 2025, across a 17-year record (2009–2025).
Show all 17 years
Multi-year averages used by the rating model: math 34% (multi-year average, 2009-2025) · reading/ELA 46% (multi-year average, 2009-2025)
* COVID-affected year — test participation was uneven nationwide. This data is weighted at 50% in the Growth score calculation.
Based on 44 test records from MA state assessments and EdFacts (NCES).
How we rate schools
A clear 1–10 score built from public data — growth, academics, and learning environment. No hidden criteria, no pay-to-play.
See how we rateThe neighborhood
Where Chelsea High sits, and what the surrounding area looks like.
Nearby same-level schools are colored by their score. Pins are locations, not attendance boundaries. Open the Boston map →
Getting around & local context
- Walk 86Very Walkable
- Transit 63Good Transit
- Bike 52Bikeable
- City Safety: High2,423/100K
Powered by
FBI Uniform Crime Reporting · 2024 · city context (Chelsea), not school-level safety or attendance eligibility. Source details
Source period: 2024. Freshness not available.
Area profileU.S. Census ACS 5-year estimates (ACS 2019–2023 5-year estimates)
Median income
$72,122
Median home value
$476,500
Median rent
$1,861/mo
College educated
22%
Homeownership
29.2%
Poverty rate
20.6%
ACS 2019–2023 5-year estimates for the ZCTA associated with school ZIP 02150; this is area context, not an attendance boundary.
Programs & students
Programs & Offerings
Compare nearby
Nearby same-level schools
4 from a 5-mile search; district fallback available
| School | Score | Grades | Distance | Enrollment | Compare |
|---|---|---|---|---|---|
| Chelsea Opportunity AcademyEnrollment path unverified | 5.5 | 9–12 | 0.0 mi | 125 | Compare → |
| Phoenix Academy Charter Public High School ChelseaCharter · enrollment unverified | 6.3 | 9–12 | 0.6 mi | 194 | Compare → |
| Pioneer Charter School of ScienceCharter · enrollment unverified | 8.2 | K–12 | 0.8 mi | 779 | Compare → |
| Seaport AcademyPrivate · tuition | Not rated | 9–12 | 0.8 mi | 24 | Compare → |
Distance is proximity only; it is not attendance eligibility.
Enrollment path unverified: Potential public school; its attendance or application path has not been classified.
Charter · enrollment unverified: Potential charter option; enrollment requirements have not been verified.
Private · tuition: Potential private option; tuition and admission requirements have not been verified.
Chelsea
- Schools in district
- 11
- Rank in district
- #6 of 11
- District spending per student
- $21,435NCES F-33 · FY 2023 · This annual source is three years behind the current year.
- District child poverty rate
- 22.2%Census SAIPE · 2024
Chelsea High is listed in Chelsea; a district label does not verify attendance for an address.
About Chelsea High
Chelsea High is a public high school in Chelsea, MA, part of Chelsea, serving approximately 1,680 students in grades 9th-12th with a 14.5:1 student-teacher ratio. It holds a MySchoolScout rating of 4.9 out of 10 and ranks #1,361 of 1,793 schools in MA. State assessment records show 34% math proficiency (multi-year average, 2009-2025) and 46% reading/ELA proficiency (multi-year average, 2009-2025).
Frequently asked questions
Common questions about Chelsea High
What grades does Chelsea High serve?
Chelsea High serves students in grades 9th through 12th.
How many students attend Chelsea High?
Chelsea High has an enrollment of approximately 1,680 students.
What is the student-teacher ratio at Chelsea High?
The student-teacher ratio at Chelsea High is 14.5:1. A lower ratio generally means more individual attention per student. The national average is approximately 16:1 for public schools.
How does Chelsea High rank in MA?
Chelsea High ranks #1,361 of 1,793 schools in MA.
What is Chelsea High's MySchoolScout rating?
Chelsea High has a current MySchoolScout rating of 4.9 out of 10. This score combines the level-appropriate components shown in the rating breakdown; equity data is shown separately for context.
What are the test scores at Chelsea High?
Based on loaded state assessment records, Chelsea High has 34% math proficiency (multi-year average, 2009-2025) and 46% reading/ELA proficiency (multi-year average, 2009-2025).
Is Chelsea High a charter school?
No, Chelsea High is not a charter school. It is a traditional public school operated by the local school district.
Is Chelsea High a Title I school?
No, Chelsea High is not currently a Title I school.
School factsNCES Common Core of Data (CCD) (SY 2023–24)
- Grades
- 9th – 12th
- Enrollment
- 1,680
- Student-Teacher Ratio
- 14.5:1
- Teachers (FTE)
- 116
- Type
- regular
- Setting
- Large Suburb
- County
- Suffolk County
- Chronic Absenteeism (SY 2022-23)
- 44.9%
- Phone
- (617) 466-5000
- 4-Year Graduation
- 75.0%
- Area population (ZIP 02150)
- 39,444
- Area average commute
- 33.5 min
- Area median age
- 34.5
Official sources & links
About this school's data
Every number on this page comes from a published source with a stated period. Where a source is partial, aging, or describes a surrounding area rather than the school, that limitation is named below.
- School directory (enrollment, grades, staff, contact)
- NCES Common Core of Data (CCD) · SY 2023–24 · Medium confidence
- Source period: SY 2023–24. A newer release may be available.
- MySchoolScout rating and rank
- MySchoolScout ranking model · Low confidence
- Vintage not available. Do not use this measure alone.
- Derived as a weighted blend of the component scores shown in Academics from state assessment, EdFacts growth, and NCES resource records.
- Math proficiency
- State department of education · 2025 MCAS · Low confidence
- Vintage not available. Do not use this measure alone.
- Available for part of the eligible units; results may not represent the full area.
- Derived from source records rather than read directly from one field.
- Reading/ELA proficiency
- State department of education · 2025 MCAS · Low confidence
- Vintage not available. Do not use this measure alone.
- Available for part of the eligible units; results may not represent the full area.
- Derived from source records rather than read directly from one field.
- Student progress (growth)
- State assessments · Mixed source periods · Low confidence
- Vintage not available. Do not use this measure alone.
- Available for part of the eligible units; results may not represent the full area.
- Derived as the fitted year-over-year slope of proficiency from multi-year assessment records.
- Neighborhood (income, housing, education)
- U.S. Census ACS 5-year estimates · ACS 2019–2023 5-year estimates · Low confidence
- Older source: ACS 2019–2023 5-year estimates. Use as historical context.
- Reported for the ZCTA for ZIP 02150; this does not measure the attendance area.
- Programs (AP/IB, athletics, gifted)
- CRDC via Urban Institute · SY 2021–22 · Medium confidence
- Available for part of the eligible units; results may not represent the full area.
- Source period: SY 2021–22. A newer release may be available.
Evidence periods: Rating mixed/unknown input periods; assessments multi-year average, 2009-2025; directory SY 2023–24
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