Enrollment
2,620
Connecticut · 2024-25 NCES data
High school (grades 9-12) · Greenwich, CT
Greenwich High School
Federal NCES profile for Greenwich High School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 63/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 090171000300
👥 S:T ratio 50
📚 AP courses 100
🌟 Gifted program 30
🎓 Counselors 67
📋 Attendance 68
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Greenwich High School earns 63/100 on the Resource Investment Index, with class sizes near the Connecticut median. It is also one of the largest schools in Connecticut.
- #7 of 9
- public schools in Greenwich · Resource Index
- 63
- Resource Index · Higher
- 12.5:1
- students per teacher
- 15.3%
- free-lunch eligible
Greenwich High School has class sizes near the Connecticut median. Computed live against every Connecticut school reporting to NCES.
By Resource Investment Index, Greenwich High School ranks #7 of 9 public schools in Greenwich, CT.
School address
District: Greenwich School District · Connecticut
NCES ID 090171000300 Verify on NCES CCD record →
Teachers (FTE)
210.0
Federal CCD staff survey
Students per teacher
12.5:1
vs 12.1:1 Connecticut avg
+3% vs state
Free-lunch eligible
15.3%
vs 36.4% Connecticut avg
-58% vs state
Student-teacher ratio in context
How Greenwich High School compares with Connecticut and U.S. medians
What stands out at Greenwich High School
Greenwich High School is a lower-poverty, large high school in Greenwich, Connecticut, enrolling 2,620 students.
Class loads run somewhat heavier than typical: 12.5:1 puts it in the larger third of Connecticut schools by student-teacher ratio.
Economic need runs somewhat below the state's typical profile, with 15.3% of students eligible for free meals.
By headcount it is one of the larger campuses in Connecticut, bigger than 99% of state schools at 2,620 students.
Its Resource Investment Index lands in the upper third of 1,003 scored Connecticut schools.
Its student body is led by White (58%) and Hispanic or Latino (26%) (diversity index 59/100).
On the academic-pipeline side it reports 32 Advanced Placement courses.
Counselor coverage is strong, about 164 students per counselor, inside the American School Counselor Association's recommended 250:1.
13.0% of students were chronically absent in the 2021-22 collection, in line with the post-pandemic national range.
The surrounding Greenwich School District spends $30,449 per pupil, 28% above the Connecticut average, a better-resourced district than most.
Greenwich School District also operates Eastern Middle School (797 students) and Western Middle School (563 students) alongside Greenwich High School.
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 Greenwich High School compares
Greenwich High School on the metrics families compare, against Connecticut and U.S. means.
| Metric | This school | vs Connecticut | Connecticut avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 12.5:1 | ▲ 3% | 12.1:1 | 15.7:1 |
| Free-lunch eligible | 15.3% | ▼ 58% | 36.4% | 51.7% |
| Enrollment | 2,620 | top 1% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
12.5:1
Leaner classes than 71% of US schools, among the more generously staffed nationally.
2,620
Bigger than 99% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Economic need
15.3%
free-lunch eligible
- 58% below the Connecticut average of 36.4%
Below the 40% Title I threshold; federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
12.5:1
students per teacher
- 3% above state mean
Top 66% in Connecticut - lower ratio than 34% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
13.0%
chronically absent (missed 10%+ of school days)
In the 10-15% range, above the pre-pandemic national baseline but within the broader post-pandemic picture.
Funding equity
$30,449
per pupil, district-wide
- above Connecticut avg of $23,870
Well above the U.S. public-school average, reflecting substantially higher local or state investment per enrolled student.
Support staff
Counselors16.0 FTE
Per 164 students, the combined health-and-guidance staffing load for this school.
Discipline context
55
in-school suspensions + 30 out-of-school
Suspension rate: 2.1 per 100 students. Combined in-school and out-of-school rate: 3.2 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 57.7%
Hispanic or Latino 25.9%
Asian 8.3%
Two or More 5.8%
African American 2.1%
American Indian / Alaska Native 0.2%
Largest group: White at 57.7% of enrollment.
Student-body diversity index 58.9/100
Simpson diversity index - at 58.9, Greenwich High School is more mixed than the Connecticut school average of 50.5.
Programs
AP courses offered 32
Funding & spending
District-wide per-pupil expenditure for Greenwich School District, which includes Greenwich High School.
$30,449
Per student
+28%
vs Connecticut
Avg $23,870
+84%
vs U.S.
Avg $16,593
Revenue mix
Local 81.4%
State 13.5%
Federal 5.1%
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 Greenwich High School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Eastern Middle School | Smaller | Lower economic need | Lower S:T ratio |
| Western Middle School | Smaller | Higher economic need | Lower S:T ratio |
| Central Middle School | Smaller | Similar economic need | Lower S:T ratio |
| Riverside School | Smaller | Lower economic need | Similar S:T ratio |
| North Mianus School | Smaller | Lower economic need | Lower S:T ratio |
Comparisons are relative to Greenwich High School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 797
- Students per teacher
- 10.4:1
- Resource Index
- 66/100
- Enrollment
- 563
- Students per teacher
- 8.3:1
- Resource Index
- 67/100
- Enrollment
- 483
- Students per teacher
- 8.8:1
- Resource Index
- 65/100
- Enrollment
- 440
- Students per teacher
- 12.6:1
- Resource Index
- 68/100
- Enrollment
- 423
- Students per teacher
- 10.8:1
- Resource Index
- 64/100
Similar high schools statewide
Matched by enrollment size and by staffing ratio across all of Connecticut, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~2,620 students)
Next steps
Verify locally before acting on Greenwich High School's federal record.
- Compare Greenwich High School against another school. Compare schools
- Greenwich School District'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 Greenwich High School
How many students attend Greenwich High School?
Greenwich High School has 2,620 students enrolled. It is a high school in Greenwich, CT.
What is the student-teacher ratio at Greenwich High School?
The student-teacher ratio at Greenwich High School is 12.5:1, which is 3% higher than the Connecticut average of 12.1:1 and 20% lower than the national average of 15.7:1.
What percentage of students receive free lunch at Greenwich High School?
15.3% of students at Greenwich High School are eligible for free lunch, compared to the Connecticut average of 36.4%.
What is the racial and ethnic makeup of Greenwich High School?
The largest demographic group at Greenwich High School is White at 57.7% of enrollment, in Greenwich, CT. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 58.9/100.
What is the Resource Investment Index for Greenwich High School?
Greenwich High School has a Resource Investment Index of 63/100 (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).
How does Greenwich High School rank among public schools in Greenwich?
By Resource Investment Index, Greenwich High School ranks #7 of 9 public schools in Greenwich, CT. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all public schools in Greenwich on the city page.
Is Greenwich High School a good school?
Greenwich High School earns 63/100 on the Resource Investment Index, with class sizes near the Connecticut median. It is also one of the largest schools in Connecticut. 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 Greenwich School District?
Besides Greenwich High School, Greenwich School District also operates Eastern Middle School (797 students), Western Middle School (563 students), and Central Middle School (483 students). See the Greenwich School District 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.