Enrollment
366
Connecticut · 2024-25 NCES data
Middle school (grades 6-8) · Mystic, CT
Stonington Middle School
Federal NCES profile for Stonington Middle School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 55/100.
2024-25 NCES dataMiddle school (grades 6-8)NCES 090438000877
👥 S:T ratio 73
🌟 Gifted program 30
🎓 Counselors 63
📋 Attendance 53
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Stonington Middle School earns 55/100 on the Resource Investment Index, with class sizes smaller than 99% of Connecticut schools.
- #1 of 3
- public schools in Mystic · Resource Index
- 55
- Resource Index · Higher
- 6.8:1
- small classes for Connecticut
- 21.9%
- free-lunch eligible
Stonington Middle School has class sizes smaller than 99% of Connecticut schools. Computed live against every Connecticut school reporting to NCES.
By Resource Investment Index, Stonington Middle School ranks #1 of 3 public schools in Mystic, CT.
School address
District: Stonington School District · Connecticut
NCES ID 090438000877 Verify on NCES CCD record →
Teachers (FTE)
54.0
Federal CCD staff survey
Students per teacher
6.8:1
vs 12.1:1 Connecticut avg
-44% vs state
Free-lunch eligible
21.9%
vs 36.4% Connecticut avg
-40% vs state
Student-teacher ratio in context
How Stonington Middle School compares with Connecticut and U.S. medians
What stands out at Stonington Middle School
Stonington Middle School is a mid-sized middle school in Mystic, Connecticut, enrolling 366 students.
Classes run notably small here: at 6.8:1, Stonington Middle School is leaner than roughly 99% of Connecticut schools and 44% under the state's 12.1:1 norm, more adult attention per pupil than most peers.
Economic need runs somewhat below the state's typical profile, with 21.9% of students eligible for free meals.
With 366 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 289 statewide peers matched on enrollment and economic need, it ranks in the upper tier at #105.
Its student body is predominantly White (84% of enrollment) (diversity index 29/100).
Counselor coverage is strong, about 183 students per counselor, inside the American School Counselor Association's recommended 250:1.
Attendance runs somewhat below the norm, with 18.9% of students chronically absent per the 2021-22 civil-rights collection.
The federal civil-rights collection also records 1 expulsion at this campus for 2021-22.
Stonington School District also operates Stonington High School (543 students) and Deans Mill School (429 students) alongside Stonington Middle 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 Stonington Middle School compares
Stonington Middle 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 | 6.8:1 | ▼ 44% | 12.1:1 | 15.7:1 |
| Free-lunch eligible | 21.9% | ▼ 40% | 36.4% | 51.7% |
| Enrollment | 366 | top 60% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
6.8:1
Leaner classes than 97% of US schools, among the more generously staffed nationally.
366
Bigger than 42% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
21.9%
free-lunch eligible
- 40% 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
6.8:1
students per teacher
- 44% below state mean
Top 1% in Connecticut - lower ratio than 99% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
18.9%
chronically absent (missed 10%+ of school days)
In the 15-20% range, nearing the "high" absenteeism threshold.
Funding equity
$25,153
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
Counselors2.0 FTE
Per 183 students, the combined health-and-guidance staffing load for this school.
Discipline context
18
in-school suspensions + 5 out-of-school
Suspension rate: 4.9 per 100 students. Combined in-school and out-of-school rate: 6.3 per 100 students. Reported via the Civil Rights Data Collection. Includes 1 expulsion.
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 6.3%
Two or More 5.5%
Asian 2.7%
African American 1.4%
American Indian / Alaska Native 0.3%
Largest group: White at 83.9% of enrollment.
Student-body diversity index 28.8/100
Simpson diversity index - at 28.8, Stonington Middle School is less mixed than the Connecticut school average of 50.5.
Programs
Funding & spending
District-wide per-pupil expenditure for Stonington School District, which includes Stonington Middle School.
$25,153
Per student
+5%
vs Connecticut
Avg $23,870
+52%
vs U.S.
Avg $16,593
Revenue mix
Local 78.2%
State 16.4%
Federal 5.4%
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 Stonington Middle School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Stonington High School | Larger | Similar economic need | Higher S:T ratio |
| Deans Mill School | Similar size | Lower economic need | Higher S:T ratio |
| West Vine Street School | Similar size | Higher economic need | Higher S:T ratio |
Comparisons are relative to Stonington Middle School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 543
- Students per teacher
- 10.6:1
- Resource Index
- 47/100
- Enrollment
- 429
- Students per teacher
- 10.5:1
- Resource Index
- 43/100
- Enrollment
- 342
- Students per teacher
- 8.6:1
- Resource Index
- 52/100
Similar middle 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 (~366 students)
Next steps
Verify locally before acting on Stonington Middle School's federal record.
- Compare Stonington Middle School against another school. Compare schools
- Stonington 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 Stonington Middle School
How many students attend Stonington Middle School?
Stonington Middle School has 366 students enrolled. It is a middle school in Mystic, CT.
What is the student-teacher ratio at Stonington Middle School?
The student-teacher ratio at Stonington Middle School is 6.8:1, which is 44% lower than the Connecticut average of 12.1:1 and 57% 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 Stonington Middle School?
21.9% of students at Stonington Middle School are eligible for free lunch, compared to the Connecticut average of 36.4%.
What is the racial and ethnic makeup of Stonington Middle School?
The largest demographic group at Stonington Middle School is White at 83.9% of enrollment, in Mystic, CT.
What is the Resource Investment Index for Stonington Middle School?
Stonington Middle School has a Resource Investment Index of 55/100 (higher reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, counselor availability, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Stonington Middle School rank among public schools in Mystic?
By Resource Investment Index, Stonington Middle School ranks #1 of 3 public schools in Mystic, 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 Mystic on the city page.
Is Stonington Middle School a good school?
Stonington Middle School earns 55/100 on the Resource Investment Index, with class sizes smaller than 99% of Connecticut schools. 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 Stonington School District?
Besides Stonington Middle School, Stonington School District also operates Stonington High School (543 students), Deans Mill School (429 students), and West Vine Street School (342 students). See the Stonington 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.