Enrollment
423
Connecticut · 2024-25 NCES data
Middle school (grades 6-8) · Killingworth, CT
Haddam-Killingworth Middle School
Federal NCES profile for Haddam-Killingworth Middle School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 61/100.
2024-25 NCES dataMiddle school (grades 6-8)NCES 090353901201
👥 S:T ratio 58
🌟 Gifted program 30
🎓 Counselors 58
📋 Attendance 99
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Haddam-Killingworth Middle School earns 61/100 on the Resource Investment Index, with class sizes smaller than 70% of Connecticut schools. It is also less racially and ethnically mixed than most Connecticut schools.
- 61
- Resource Index · Higher
- 10.6:1
- small classes for Connecticut
- 8.5%
- free-lunch eligible
- 423
- students enrolled
Haddam-Killingworth Middle School has class sizes smaller than 70% of Connecticut schools. Computed live against every Connecticut school reporting to NCES.
School address
District: Regional School District 17 · Connecticut
NCES ID 090353901201 Verify on NCES CCD record →
Teachers (FTE)
40.0
Federal CCD staff survey
Students per teacher
10.6:1
vs 12.1:1 Connecticut avg
-12% vs state
Free-lunch eligible
8.5%
vs 36.4% Connecticut avg
-77% vs state
Student-teacher ratio in context
How Haddam-Killingworth Middle School compares with Connecticut and U.S. medians
What stands out at Haddam-Killingworth Middle School
Haddam-Killingworth Middle School is a lower-poverty, mid-sized middle school in Killingworth, Connecticut, enrolling 423 students.
Class sizes run a bit leaner than typical: 10.6:1 puts it in the smaller third of Connecticut schools by student-teacher ratio.
Comparatively few students face economic hardship here, 8.5% free-meal eligibility runs 77% below the Connecticut average.
With 423 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 247 statewide peers matched on enrollment and economic need, it ranks in the upper tier at #74.
Its student body is predominantly White (89% of enrollment), among the less diverse in the state (diversity index 21/100).
Counselor coverage is strong, about 212 students per counselor, inside the American School Counselor Association's recommended 250:1.
Attendance holds up well here: only 0.5% of students were chronically absent, below the typical post-pandemic national figure.
Regional School District 17 also operates Haddam-Killingworth High School (466 students) and Haddam-Killingworth Intermediate School (280 students) alongside Haddam-Killingworth 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 Haddam-Killingworth Middle School compares
Haddam-Killingworth 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 | 10.6:1 | ▼ 12% | 12.1:1 | 15.7:1 |
| Free-lunch eligible | 8.5% | ▼ 77% | 36.4% | 51.7% |
| Enrollment | 423 | top 47% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
10.6:1
Leaner classes than 85% of US schools, among the more generously staffed nationally.
423
Bigger than 51% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
8.5%
free-lunch eligible
- 77% 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
10.6:1
students per teacher
- 12% below state mean
Top 30% in Connecticut - lower ratio than 70% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
0.5%
chronically absent (missed 10%+ of school days)
Below 5%, comfortably under the pre-pandemic national baseline for chronic absenteeism.
Funding equity
$25,698
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 212 students, the combined health-and-guidance staffing load for this school.
Discipline context
15
in-school suspensions + 7 out-of-school
Suspension rate: 3.5 per 100 students. Combined in-school and out-of-school rate: 5.2 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 88.9%
Hispanic or Latino 5.0%
Two or More 3.3%
African American 1.7%
Asian 1.2%
Largest group: White at 88.9% of enrollment.
Student-body diversity index 20.6/100
Simpson diversity index - at 20.6, Haddam-Killingworth Middle School is less mixed than the Connecticut school average of 50.5.
Programs
Funding & spending
District-wide per-pupil expenditure for Regional School District 17, which includes Haddam-Killingworth Middle School.
$25,698
Per student
+8%
vs Connecticut
Avg $23,870
+55%
vs U.S.
Avg $16,593
Revenue mix
Local 74.8%
State 22.0%
Federal 3.2%
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 Haddam-Killingworth Middle School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Haddam-Killingworth High School | Similar size | Similar economic need | Lower S:T ratio |
| Haddam-Killingworth Intermediate School | Smaller | Similar economic need | Similar S:T ratio |
| Burr District Elementary School | Smaller | Similar economic need | Similar S:T ratio |
| Killingworth Elementary School | Smaller | Similar economic need | Similar S:T ratio |
Comparisons are relative to Haddam-Killingworth Middle School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 466
- Students per teacher
- 9.1:1
- Resource Index
- 64/100
- Enrollment
- 280
- Students per teacher
- 10.4:1
- Resource Index
- 54/100
- Enrollment
- 278
- Students per teacher
- 9.9:1
- Resource Index
- 70/100
- Enrollment
- 257
- Students per teacher
- 11.2:1
- Resource Index
- 73/100
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 (~423 students)
Similar student-teacher ratio (~10.6:1)
Next steps
Verify locally before acting on Haddam-Killingworth Middle School's federal record.
- Compare Haddam-Killingworth Middle School against another school. Compare schools
- Regional School District 17'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 Haddam-Killingworth Middle School
How many students attend Haddam-Killingworth Middle School?
Haddam-Killingworth Middle School has 423 students enrolled. It is a middle school in Killingworth, CT.
What is the student-teacher ratio at Haddam-Killingworth Middle School?
The student-teacher ratio at Haddam-Killingworth Middle School is 10.6:1, which is 12% lower than the Connecticut average of 12.1:1 and 32% 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 Haddam-Killingworth Middle School?
8.5% of students at Haddam-Killingworth Middle School are eligible for free lunch, compared to the Connecticut average of 36.4%.
What is the racial and ethnic makeup of Haddam-Killingworth Middle School?
The largest demographic group at Haddam-Killingworth Middle School is White at 88.9% of enrollment, in Killingworth, CT.
What is the Resource Investment Index for Haddam-Killingworth Middle School?
Haddam-Killingworth Middle School has a Resource Investment Index of 61/100 (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).
Is Haddam-Killingworth Middle School a good school?
Haddam-Killingworth Middle School earns 61/100 on the Resource Investment Index, with class sizes smaller than 70% of Connecticut schools. It is also less racially and ethnically mixed than most 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 Regional School District 17?
Besides Haddam-Killingworth Middle School, Regional School District 17 also operates Haddam-Killingworth High School (466 students), Haddam-Killingworth Intermediate School (280 students), and Burr District Elementary School (278 students). See the Regional School District 17 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.