- Enrollment
- 797
- Students per teacher
- 10.4:1
- Resource Index
- 66/100
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 54/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 090171000300
👥 S:T ratio 50
🌟 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 54/100 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
- 54
- 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 →
CCD year-over-year · 2022-23 → 2023-24
-35 students YoY
Greenwich High School held near 2,633 students from 2022-23 to 2023-24 (-35 headcount).
Teacher FTE lost 210.9 → 197.3 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Steady CCD campus
-35 students YoY 090171000300 · Greenwich, CT High · LARGE · TRAD
2,620 enr · 12.5:1 · 15.3% lunch · RII 54
Nearest enrollment peer: Eastern Middle School (797 students)
Greenwich High School held near 2,633 students from 2022-23 to 2023-24 (-35 headcount). Teacher FTE lost 210.9 → 197.3 across the same CCD years. Read with this school → · District book → · Connecticut schools → · Find another →
Greenwich High School in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- This school
Greenwich High School
2,620 students
- Eastern Middle 797
Eastern Middle School
797 students
- Western Middle 563
Western Middle School
563 students
- Central Middle 483
Central Middle School
483 students
- Riverside Scho 440
Riverside School
440 students
- North Mianus S 423
North Mianus School
423 students
What this shows Greenwich High School reports 2,620 students on the CCD universe file.
How Greenwich High School compares
Greenwich High School held steady on CCD headcount: ratios and free-lunch share vs 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 methodology
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
$31,154
per pupil, district-wide
- above Connecticut avg of $24,680
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.
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
District finance for Greenwich School District reports $31,154 per pupil (NCES F-33) - open the district page for the full revenue mix.
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
- 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
Nationwide high schools with similar size or staffing
Out-of-state peers matched by enrollment and by student-teacher ratio, not the same-city or same-district lists above.
Similar enrollment (~2,620 students)
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. CCD year-over-year: 2,668 (2022-23) → 2,633 (2023-24), nearly flat (-35).
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 54/100 (higher reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, gifted-program reporting, counselor availability, chronic absenteeism. 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.
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.