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For the 2025-26 school year, there are 3 public schools serving 944 students in Killingworth, CT.

The top-ranked public schools in Killingworth, CT are Killingworth Elementary School, Haddam-killingworth Intermediate School and Haddam-killingworth Middle School. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.

Killingworth, CT public schools have an average math proficiency score of 60% (versus the Connecticut public school average of 42%), and reading proficiency score of 71% (versus the 51% statewide average). Schools in Killingworth have an average ranking of 8/10, which is in the top 30% of Connecticut public schools.

Minority enrollment is 11% of the student body (majority Hispanic), which is less than the Connecticut public school average of 54% (majority Hispanic).