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For the 2025-26 school year, there are 2 public high schools serving 776 students in Johnston, SC.

The top-ranked public high school in Johnston, SC is Strom Thurmond High School. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.

Johnston, SC public high schools have an average math proficiency score of 27% (versus the South Carolina public high school average of 53%), and reading proficiency score of 77% (versus the 77% statewide average). High schools in Johnston have an average ranking of 3/10, which is in the bottom 50% of South Carolina public high schools.

Johnston, SC public high school have a Graduation Rate of 82%, which is less than the South Carolina average of 84%.

The school with highest graduation rate is Strom Thurmond High School, with 80-84% graduation rate. Read more about public school graduation rate statistics in South Carolina or national school graduation rate statistics.

Minority enrollment is 57% of the student body (majority Black), which is more than the South Carolina public high school average of 52% (majority Black).