Enrollment
385
Connecticut · 2024-25 NCES data
Other / mixed grade configuration · Old Greenwich, CT
Old Greenwich School
Federal NCES profile for Old Greenwich School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 63/100.
2024-25 NCES dataOther / mixed grade configurationNCES 090171000306
👥 S:T ratio 56
🌟 Gifted program 70
📋 Attendance 64
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Old Greenwich School earns 63/100 on the Resource Investment Index, with class sizes near the Connecticut median.
- 63
- Resource Index · Higher
- 11:1
- students per teacher
- 1.2%
- free-lunch eligible
- 385
- students enrolled
Old Greenwich School has class sizes near the Connecticut median. Computed live against every Connecticut school reporting to NCES.
School address
District: Greenwich School District · Connecticut
NCES ID 090171000306 Verify on NCES CCD record →
Teachers (FTE)
35.0
Federal CCD staff survey
Students per teacher
11:1
vs 12.1:1 Connecticut avg
-9% vs state
Free-lunch eligible
1.2%
vs 36.4% Connecticut avg
-97% vs state
Student-teacher ratio in context
How Old Greenwich School compares with Connecticut and U.S. medians
What stands out at Old Greenwich School
Old Greenwich School is a lower-poverty, mid-sized combined-grade school in Old Greenwich, Connecticut, enrolling 385 students.
Class sizes run a bit leaner than typical: 11:1 puts it in the smaller third of Connecticut schools by student-teacher ratio.
Comparatively few students face economic hardship here, 1.2% free-meal eligibility runs 97% below the Connecticut average.
With 385 students, its enrollment sits close to the Connecticut median campus size.
Its Resource Investment Index lands in the upper third of 1,003 scored Connecticut schools.
Against 157 statewide peers matched on enrollment and economic need, it ranks in the upper tier at #44.
Its student body is predominantly White (84% of enrollment) (diversity index 29/100).
14.5% 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 Greenwich High School (2,620 students) and Eastern Middle School (797 students) alongside Old Greenwich 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 Old Greenwich School compares
Old Greenwich 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 | 11:1 | ▼ 9% | 12.1:1 | 15.7:1 |
| Free-lunch eligible | 1.2% | ▼ 97% | 36.4% | 51.7% |
| Enrollment | 385 | top 55% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
11:1
Leaner classes than 83% of US schools, among the more generously staffed nationally.
385
Bigger than 45% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
1.2%
free-lunch eligible
- 97% below the Connecticut average of 36.4%
Below the 40% Title I threshold, among the lower-need profiles in the state; federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
11:1
students per teacher
- 9% below state mean
Top 38% in Connecticut - lower ratio than 62% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
14.5%
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
Counselors0.0 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
0
in-school suspensions + 0 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 0.0 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 83.9%
Hispanic or Latino 7.5%
Two or More 4.7%
Asian 3.9%
Largest group: White at 83.9% of enrollment.
Student-body diversity index 28.7/100
Simpson diversity index - at 28.7, Old Greenwich School is less mixed than the Connecticut school average of 50.5.
Programs
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Greenwich School District, which includes Old Greenwich 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 Old Greenwich School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Greenwich High School | Larger | Higher economic need | Higher S:T ratio |
| Eastern Middle School | Larger | Similar economic need | Similar S:T ratio |
| Western Middle School | Larger | Higher economic need | Lower S:T ratio |
| Central Middle School | Larger | Higher economic need | Lower S:T ratio |
| Riverside School | Similar size | Similar economic need | Higher S:T ratio |
Comparisons are relative to Old Greenwich School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 2,620
- Students per teacher
- 12.5:1
- Resource Index
- 54/100
- 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
Similar other 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 (~385 students)
Similar student-teacher ratio (~11:1)
Next steps
Verify locally before acting on Old Greenwich School's federal record.
- Compare Old Greenwich 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 Old Greenwich School
How many students attend Old Greenwich School?
Old Greenwich School has 385 students enrolled. It is a public school in Old Greenwich, CT.
What is the student-teacher ratio at Old Greenwich School?
The student-teacher ratio at Old Greenwich School is 11:1, which is 9% lower than the Connecticut average of 12.1:1 and 30% lower than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What percentage of students receive free lunch at Old Greenwich School?
1.2% of students at Old Greenwich School are eligible for free lunch, compared to the Connecticut average of 36.4%.
What is the racial and ethnic makeup of Old Greenwich School?
The largest demographic group at Old Greenwich School is White at 83.9% of enrollment, in Old Greenwich, CT.
What is the Resource Investment Index for Old Greenwich School?
Old Greenwich School has a Resource Investment Index of 63/100 (higher reported resources relative to schools nationally) based on 3 factors: student-teacher ratio, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
Is Old Greenwich School a good school?
Old Greenwich School earns 63/100 on the Resource Investment Index, with class sizes near the Connecticut median. 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 Old Greenwich School, Greenwich School District also operates Greenwich High School (2,620 students), Eastern Middle School (797 students), and Western Middle School (563 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.