Haddam-Killingworth Middle School
🇺🇸 Official data · 2025Killingworth, Connecticut 06419 · Regional School District 17
#50 of 178 middle schools in Connecticut
#814 of 15,369 nationally
About Haddam-Killingworth Middle School
Haddam-Killingworth Middle School is a public middle located in Killingworth, in the Regional School District 17 school district of Connecticut, United States. It caters for Grades 6–8. In 2025 it enrolled 423 students. Traditional public schools run by a school district; free to attend.
Its Success Index (US) is 84.5 out of 100, placing it in the top 10% of middle schools in United States and 50th of 178 ranked middle schools in Connecticut. Its strongest component is community advantage (fewer free/reduced-price lunch) (94th percentile), and its weakest is math proficiency (75th percentile).
Other published figures: enrollment 423.
There are 2 schools in Killingworth; Haddam-Killingworth Middle School ranks 1st of 2 scored schools there.
Success Index (US) breakdown
Each component is a percentile against middle schools across United States.
- Math proficiency (30%)58%
- Reading proficiency (30%)71%
- Community advantage (fewer free/reduced-price lunch) (25%)15.6%
- Students per teacher (15%)11.4
The Success Index (US) summarises published data about a school community. It is not a measure of teaching quality. Read the methodology.
Published measures
All figures published for Haddam-Killingworth Middle School by the official sources.
- Enrollment
- 423
- Students enrolled in the latest NCES directory year.
- Free/reduced-price lunch
- 15.6%
- Share of students eligible for free or reduced-price lunch.
- Students per teacher
- 11.4
- Enrollment divided by FTE teachers; not class size.
- Reading proficiency
- 71%
- Share of tested students proficient or above (all students, all grades).
- Math proficiency
- 58%
- Share of tested students proficient or above (all students, all grades).
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Schools near Haddam-Killingworth Middle School
Closest schools by straight-line distance, with their Success Index (US).
Haddam-Killingworth Intermediate School
Killingworth · Public elementary · Grades 4–5
280 students · 0 m away
Killingworth Elementary School
Higganum · Public elementary · Grades PK–3
257 students · 1.2 km away
Dr. Robert H. Brown Intermediate School
Madison · Public elementary · Grades 4–5
361 students · 6.8 km away
Burr District Elementary School
Higganum · Public elementary · Grades K–3
278 students · 6.9 km away
Kathleen H. Ryerson Elementary School
Madison · Public elementary · Grades K–3
314 students · 7.0 km away
Haddam-Killingworth High School
Higganum · Public high · Grades 9–12
466 students · 9.0 km away
Chester Elementary School
Chester · Public elementary · Grades PK–6
198 students · 9.1 km away
John Winthrop Middle School
Deep River · Public middle · Grades 7–8
197 students · 9.2 km away
Lewin G. Joel Jr. School
Clinton · Public elementary · Grades PK–4
532 students · 9.4 km away
The Morgan School
Clinton · Public high · Grades 9–12
473 students · 9.5 km away
Similar schools
Public middle schools in Connecticut with a comparable Enrollment.
Plainfield Central School
Plainfield · Public middle · Grades 6–8
422 students
Memorial Middle School
Middlebury · Public middle · Grades 6–8
420 students
Jared Eliot School
Clinton · Public middle · Grades 5–8
418 students
Mansfield Middle School
Storrs · Public middle · Grades 5–8
414 students
Rochambeau Middle School
Southbury · Public middle · Grades 6–8
412 students
Long River Middle School
Prospect · Public middle · Grades 6–8
434 students
Frequently asked questions
Is Haddam-Killingworth Middle School a good school?
Haddam-Killingworth Middle School has a Success Index (US) of 84.5 out of 100 (Top 10% of middle schools in United States) and ranks #50 of 178 in Connecticut. The index summarises published data about the school community and, where available, attainment; it does not measure teaching quality, so visit the school and ask about support at your child's level.
Where does Haddam-Killingworth Middle School rank in Connecticut?
Haddam-Killingworth Middle School ranks #50 of 178 middle schools in Connecticut and #814 of 15,369 nationally on the Success Index (US) (2025 data).
How many students attend Haddam-Killingworth Middle School?
Haddam-Killingworth Middle School had 423 students in 2025.
Is Haddam-Killingworth Middle School a elementary school or a high school?
Haddam-Killingworth Middle School is classified as a middle covering Grades 6–8. It is a public school.
What other schools are near Haddam-Killingworth Middle School?
There are 10 schools within 15 km of Haddam-Killingworth Middle School; they are listed on this page with their Success Index (US) and distance, and can be compared side by side.