St. John's High School is a senior high school in Charleston, South Carolina, on Johns Island. It is a part of the Charleston County School District. St. John's is home to approximately 300 students and 30 faculty and staff. Its boundary also includes Kiawah Island and Seabrook Island.
Serving 423 students in grades 9-12, St. Johns High School ranks in the top 30% of all schools in South Carolina for overall test scores (math proficiency is top 30%, and reading proficiency is top 30%).
The percentage of students achieving proficiency in math is 50-59% (which is higher than the South Carolina state average of 43%). The percentage of students achieving proficiency in reading/language arts is 75-79% (which is higher than the South Carolina state average of 52%).
The student-teacher ratio of 14:1 is equal to the South Carolina state level of 14:1.
Minority enrollment is 80% of the student body (majority Black), which is higher than the South Carolina state average of 53% (majority Black and Hispanic).
Quick Facts (2025)
- Grades: 9-12
- Enrollment: 423 students
- Student-Teacher Ratio: 14:1
- Minority Enrollment: 80%
- Graduation Rate: 80-84% (Btm 50% in SC)
- Overall Testing Rank: Top 30%
- Math Proficiency: 50-59% (Top 30%)
- Reading Proficiency: 75-79% (Top 20%)
- Science Proficiency: 35-39% (Btm 50%)
- Source: National Center for Education Statistics (NCES), SC Dept. of Education
Top Rankings
St. Johns High School ranks among the top 20% of public schools in South Carolina for:
Category
Attribute
Most improved public schools
Reading/Language Arts Proficiency
Diversity
Percent Eligible For Free Lunch
Student Attention
School Overview
St. Johns High School's student population of 423 students has grown by 22% over five school years.
The teacher population of 30 teachers has declined by 14% over five school years.
Grades Offered
Grades 9-12
(Supplemental Virtual)
(Supplemental Virtual)
Total Students
423 students
Gender %
Total Classroom Teachers
30 teachers
Colors
Red, Royal blue
School Rankings
St. Johns High School ranks within the top 30% of all 1,118 schools in South Carolina (based off of combined math and reading proficiency testing data).
The diversity score of St. Johns High School is 0.67, which is equal to the diversity score at state average of 0.67. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#224 out of 1118 schools
(Top 30%)
(Top 30%)
Math Test Scores (% Proficient)
50-59%
43%
Reading/Language Arts Test Scores (% Proficient)
75-79%
52%
Science Test Scores (% Proficient)
35-39%
50%
Student-Teacher Ratio
14:1
14:1
American Indian
n/a
n/a
Asian
n/a
2%
Hispanic
38%
14%
Black
39%
31%
White
20%
47%
Hawaiian
n/a
n/a
Two or more races
3%
6%
All Ethnic Groups
Graduation Rate
80-84%
84%
Participates in the National School Lunch Program (NSLP)
Yes
Eligible for Free Lunch
100%
67%
Eligible for Reduced Lunch (14-15)
9%
6%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), SC Dept. of Education
Profile last updated: 02/09/2025
Frequently Asked Questions
What is St. Johns High School's ranking?
St. Johns High School is ranked #224 out of 1,118 schools, which ranks it among the top 30% of public schools in South Carolina.
What schools are St. Johns High School often compared to?
St. Johns High Schoolis often viewed alongside schools like Wando High School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
50-59% of students have achieved math proficiency (compared to the 43% SC state average), while 75-79% of students have achieved reading proficiency (compared to the 52% SC state average).
What is the graduation rate of St. Johns High School?
The graduation rate of St. Johns High School is 80-84%, which is lower than the South Carolina state average of 84%.
How many students attend St. Johns High School?
423 students attend St. Johns High School.
What is the racial composition of the student body?
39% of St. Johns High School students are Black, 38% of students are Hispanic, 20% of students are White, and 3% of students are Two or more races.
What is the student-teacher ratio of St. Johns High School?
St. Johns High School has a student ration of 14:1, which is equal to the South Carolina state average of 14:1.
What grades does St. Johns High School offer ?
St. Johns High School offers enrollment in grades 9-12 (Supplemental Virtual).
What school district is St. Johns High School part of?
St. Johns High School is part of Charleston 01 School District.
School Reviews
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