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For the 2025 school year, there are 5 public schools serving 1,460 students in Decatur County, TN (there are , serving 34 private students). 98% of all K-12 students in Decatur County, TN are educated in public schools (compared to the TN state average of 90%).

The top ranked public schools in Decatur County, TN are Decaturville Elementary School, Scotts Hill Elementary School and Decatur County Middle School. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.

Decatur County, TN public schools have an average math proficiency score of 49% (versus the Tennessee public school average of 31%), and reading proficiency score of 42% (versus the 37% statewide average). Schools in Decatur County have an average ranking of 10/10, which is in the top 10% of Tennessee public schools.

Minority enrollment is 11% of the student body (majority Hispanic), which is less than the Tennessee public school average of 43% (majority Black).