Haddam-Killingworth Intermediate School
Killingworth, CT · Elementary School · Grades 4-5
Haddam-Killingworth Intermediate School is a elementary school in Killingworth, CT with 260 students enrolled and a 65% proficiency rate. Part of Regional School District 17. NCES data from the U.S. Department of Education.
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About This School
Haddam-Killingworth Intermediate School is a elementary school located in Killingworth, Connecticut. The school serves 260 students in grades 4-5. The student-to-teacher ratio is 9.6:1.
According to EDFacts assessment data, 65% of students meet grade-level proficiency standards in combined math and reading.
15% of students qualify for free or reduced-price lunch.
Haddam-Killingworth Intermediate School is part of the Regional School District 17 in Connecticut.
How This School Compares
Haddam-Killingworth Intermediate School has 260 students enrolled, making it smaller than the average school in Regional School District 17 (360 students). Its 65% proficiency rate is 1 percentage points below the district average of 66%. Compared to the Connecticut state average of 53%, the school performs 12 points higher. With a 9.6:1 student-teacher ratio, it offers smaller class sizes than the national average.
Frequently Asked Questions
Haddam-Killingworth Intermediate School has 260 students enrolled in grades 4-5. The student-to-teacher ratio is 9.6:1.
According to EDFacts data, 65% of students at Haddam-Killingworth Intermediate School meet grade-level proficiency standards in combined math and reading assessments.
Haddam-Killingworth Intermediate School is part of the Regional School District 17 in Killingworth, Connecticut. You can view all schools in this district on the district page.
All data on this page comes from the National Center for Education Statistics (NCES) Common Core of Data and EDFacts assessment results. These are official federal datasets published by the U.S. Department of Education.
School profiles are built from NCES directory data and EDFacts assessment results. Proficiency rates reflect combined math and reading performance. Graduation rates are reported for high schools with available data.
For this entity, the underlying data on this page comes from NCES Common Core of Data and EDFacts. The breakdown above is the federal record; the paragraphs below add the per-entity context that makes the headline numbers usable for a real decision rather than just a data lookup.
The methodology behind every numeric value on this page is publicly documented on the NCES Common Core of Data and EDFacts portal and described in detail on this site’s methodology page. Refresh cadence varies by underlying series; the page surfaces the as-of date for each number so readers can trace any figure back to the source release.
For readers using this page as a decision input, the related-entity pages elsewhere on the site provide the comparison set. The most useful comparison for this entity is typically a peer within U.S. public schools and districts with similar size, similar exposure, or similar geography — not the national-level summary alone.
Source: NCES Common Core of Data, 2026.