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 390 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 11:1 is lower than the South Carolina state level of 14:1.
Minority enrollment is 80% of the student body (majority Hispanic), which is higher than the South Carolina state average of 54% (majority Black and Hispanic).
Quick Facts (2026-27)
- Grades: 9-12
- Enrollment: 390 students
- Student-Teacher Ratio: 11:1
- 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%)
- Attendance Zone: St. Johns High serves the southwest part of Johns Island, SC, covering an area of approximately 215.2 square miles. Most families can expect a typical drive of 10-15 minutes to the school, with an average distance of 6.8 miles from the school to the zone's edge, reaching up to 16.7 miles at its furthest point.
- 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
School Overview
St. Johns High School's student population of 390 students has stayed relatively flat over five school years.
The teacher population of 34 teachers has grown by 21% over five school years.
Grades Offered
Grades 9-12
(Supplemental Virtual)
(Supplemental Virtual)
Total Students
390 students
Total Classroom Teachers
34 teachers
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 0.66, which is less than 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
11:1
14:1
American Indian
n/a
n/a
Asian
n/a
2%
Hispanic
41%
15%
Black
37%
31%
White
20%
46%
Hawaiian
n/a
n/a
Two or more races
2%
6%
All Ethnic Groups
Graduation Rate
80-84%
84%
Chronically Absent Students
(22-23)51.8%
25.2%
Participates in the National School Lunch Program (NSLP)
Yes
Eligible for Free Lunch
76%
50%
Eligible for Reduced Lunch (14-15)
9%
6%
School Statewide Testing
School District Name
Sports
Colors
Red, Royal blue
Source: National Center for Education Statistics (NCES), SC Dept. of Education
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?
390 students attend St. Johns High School.
What is the racial composition of the student body?
41% of St. Johns High School students are Hispanic, 37% of students are Black, 20% of students are White, and 2% 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 11:1, which is lower than 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
Review St. Johns High School. Reviews should be a few sentences in length. Please include any comments on:
- Quality of academic programs, teachers, and facilities
- Availability of music, art, sports and other extracurricular activities
Recent Articles
What Makes an Elementary School Feel Supportive?
Discover what makes one elementary school more supportive than another, from teacher relationships and family communication to classroom attention, belonging, student services, leadership, routines, and responsive academic support systems.
Second School Tour: Questions Parents Forget to Ask
A second school tour can reveal what families miss initially. Learn which questions to ask about teachers, support, schedules, safety, communication, programs, and everyday student life before enrolling.
Attendance Policies Are Changing: Parent Guide 2026
Attendance policies are changing across public schools. Learn what parents should examine about absences, tardiness, interventions, flexibility, communication, and student support before choosing a school for their child today.
