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For the 2025-26 school year, there is 1 public school serving 475 students in Columbia, CT (there are , serving 27 private students). 95% of all K-12 students in Columbia, CT are educated in public schools (compared to the CT state average of 88%).

The top-ranked public school in Columbia, CT is Horace W. Porter School. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.

Columbia, CT public school have an average math proficiency score of 46% (versus the Connecticut public school average of 42%), and reading proficiency score of 52% (versus the 51% statewide average). Schools in Columbia have an average ranking of 4/10, which is in the bottom 50% of Connecticut public schools.

Minority enrollment is 15% of the student body (majority Hispanic), which is less than the Connecticut public school average of 54% (majority Hispanic).