Enrollment
1,402
Massachusetts · 2024-25 NCES data
High school (grades 9-12) · North Chelmsford, MA
Chelmsford High
Federal NCES profile for Chelmsford High, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 58/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 250351000475
👥 S:T ratio 44
📚 AP courses 100
🌟 Gifted program 30
🎓 Counselors 63
📋 Attendance 52
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Chelmsford High earns 58/100 on the Resource Investment Index, with class sizes larger than 79% of Massachusetts schools. It is also one of the largest schools in Massachusetts.
- 58
- Resource Index · Higher
- 14:1
- large classes for Massachusetts
- 1,402
- students enrolled
Chelmsford High has class sizes larger than 79% of Massachusetts schools. Computed live against every Massachusetts school reporting to NCES.
School address
District: Chelmsford · Massachusetts
NCES ID 250351000475 Verify on NCES CCD record →
Teachers (FTE)
100.0
Federal CCD staff survey
Students per teacher
14:1
vs 12.3:1 Massachusetts avg
+14% vs state
Student-teacher ratio in context
How Chelmsford High compares with Massachusetts and U.S. medians
What stands out at Chelmsford High
Chelmsford High is a large high school in North Chelmsford, Massachusetts, enrolling 1,402 students.
Class loads run somewhat heavier than typical: 14:1 puts it in the larger third of Massachusetts schools by student-teacher ratio.
By headcount it is one of the larger campuses in Massachusetts, bigger than 97% of state schools at 1,402 students.
Its Resource Investment Index sits near the middle of the pack among 1,831 scored Massachusetts schools.
Its student body is led by White (63%) and Asian (19%) (diversity index 56/100).
On the academic-pipeline side it reports 22 Advanced Placement courses.
Counselor coverage is strong, about 185 students per counselor, inside the American School Counselor Association's recommended 250:1.
Attendance runs somewhat below the norm, with 19.2% of students chronically absent per the 2021-22 civil-rights collection.
The surrounding Chelmsford spends $17,638 per pupil, 21% below the Massachusetts average, a leaner-resourced district than most.
Chelmsford also operates Mccarthy Middle School (808 students) and Col Moses Parker School (778 students) alongside Chelmsford High.
Sourced from NCES CCD, CRDC, and F-33 (federal records, not a quality verdict). How we source and compute this.
Source: National Center for Education Statistics Common Core of Data + CRDC + F-33 · 2024-25
How Chelmsford High compares
Chelmsford High on the metrics families compare, against Massachusetts and U.S. means.
| Metric | This school | vs Massachusetts | Massachusetts avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 14:1 | ▲ 14% | 12.3:1 | 15.7:1 |
| Enrollment | 1,402 | top 3% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
14:1
Leaner classes than 57% of US schools, a middle-of-the-pack class size.
1,402
Bigger than 96% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Staffing depth
14:1
students per teacher
- 14% above state mean
Top 79% in Massachusetts - lower ratio than 21% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
19.2%
chronically absent (missed 10%+ of school days)
In the 15-20% range, nearing the "high" absenteeism threshold.
Funding equity
$17,638
per pupil, district-wide
- below Massachusetts avg of $22,458
Somewhat above the U.S. public-school average, reflecting higher local or state investment per enrolled student.
Support staff
Counselors7.6 FTE
Per 184 students, the combined health-and-guidance staffing load for this school.
Discipline context
67
in-school suspensions + 54 out-of-school
Suspension rate: 4.8 per 100 students. Combined in-school and out-of-school rate: 8.6 per 100 students. Reported via the Civil Rights Data Collection.
Overview
- Common Core of Data (June 2026): enrollment, staffing, and the student-teacher ratio above.
- Civil Rights Data Collection: discipline counts and program access (AP, gifted, special education).
- F-33 School District Finance Survey: the district-wide per-pupil spending figures below.
Three separate federal collections, each on its own reporting cadence - which is why this school's numbers line up on a consistent basis against every other school and state on this site, rather than mixing figures pulled from different survey years.
Student demographics
White 62.5%
Asian 19.0%
Hispanic or Latino 9.5%
African American 4.6%
Two or More 4.1%
American Indian / Alaska Native 0.1%
Native Hawaiian / Pacific Islander 0.1%
Largest group: White at 62.5% of enrollment.
Student-body diversity index 56.0/100
Simpson diversity index - at 56.0, Chelmsford High is more mixed than the Massachusetts school average of 47.3.
Programs
AP courses offered 22
Funding & spending
District-wide per-pupil expenditure for Chelmsford, which includes Chelmsford High.
$17,638
Per student
-21%
vs Massachusetts
Avg $22,458
+6%
vs U.S.
Avg $16,593
Revenue mix
Local 67.8%
State 25.7%
Federal 6.5%
Source: NCES F-33 School District Finance Survey District-level finance · FY 2021-22 Per-pupil expenditure reflects the district-wide average. Individual school budgets are not reported at the federal level.
How Chelmsford High Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Mccarthy Middle School | Smaller | No free-lunch data | Similar S:T ratio |
| Col Moses Parker School | Smaller | No free-lunch data | Lower S:T ratio |
| Byam School | Smaller | No free-lunch data | Similar S:T ratio |
| Center Elementary School | Smaller | No free-lunch data | Similar S:T ratio |
| Charles D Harrington | Smaller | No free-lunch data | Similar S:T ratio |
Comparisons are relative to Chelmsford High's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 808
- Students per teacher
- 12.6:1
- Resource Index
- 48/100
- Enrollment
- 778
- Students per teacher
- 12.2:1
- Resource Index
- 40/100
- Enrollment
- 510
- Students per teacher
- 13.1:1
- Resource Index
- 32/100
- Enrollment
- 480
- Students per teacher
- 13.7:1
- Resource Index
- 38/100
- Enrollment
- 468
- Students per teacher
- 14.6:1
- Resource Index
- 34/100
Similar high schools statewide
Matched by enrollment size and by staffing ratio across all of Massachusetts, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~1,402 students)
Similar student-teacher ratio (~14:1)
Next steps
Verify locally before acting on Chelmsford High's federal record.
- Compare Chelmsford High against another school. Compare schools
- Chelmsford's spending and staffing shape this school. District profile
- Confirm current enrollment and boundaries with the school. Choosing guide
Federal record (CCD 2024-25, CRDC 2021-22) - PlainSchools assigns no subjective rating; the composite quality score is a transparent, reproducible index computed from this cited federal data.
Frequently asked questions about Chelmsford High
How many students attend Chelmsford High?
Chelmsford High has 1,402 students enrolled. It is a high school in North Chelmsford, MA.
What is the student-teacher ratio at Chelmsford High?
The student-teacher ratio at Chelmsford High is 14:1, which is 14% higher than the Massachusetts average of 12.3:1 and 11% lower than the national average of 15.7:1.
What is the racial and ethnic makeup of Chelmsford High?
The largest demographic group at Chelmsford High is White at 62.5% of enrollment, in North Chelmsford, MA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 56.0/100.
What is the Resource Investment Index for Chelmsford High?
Chelmsford High has a Resource Investment Index of 58/100 (higher reported resources relative to schools nationally) based on 5 factors: student-teacher ratio, AP course offerings, counselor availability, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
Is Chelmsford High a good school?
Chelmsford High earns 58/100 on the Resource Investment Index, with class sizes larger than 79% of Massachusetts schools. It is also one of the largest schools in Massachusetts. This is a resource snapshot, not an academic rating; see the Resource Investment Index question above for what the number does and doesn't measure.
What other schools are in Chelmsford?
Besides Chelmsford High, Chelmsford also operates Mccarthy Middle School (808 students), Col Moses Parker School (778 students), and Byam School (510 students). See the Chelmsford district page for the complete list.
Related tools
Every figure on PlainSchools is rendered directly from the source NCES, CRDC and F-33 federal records, no number is typed in by an editor. Each school's figures reflect its most recent NCES/CRDC submission on file. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of June 2026.