Enrollment
390
South Carolina · 2024-25 NCES data
High school (grades 9-12) · Johns Island, SC
St. Johns High
Federal NCES profile for St. Johns High, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 34/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 450144000264
👥 S:T ratio 50
📚 AP courses 15
🌟 Gifted program 30
📋 Attendance 41
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
St. Johns High earns 34/100 on the Resource Investment Index, with class sizes smaller than 71% of South Carolina schools.
- #4 of 4
- public schools in Johns Island · Resource Index
- 34
- Resource Index · Typical
- 12.6:1
- small classes for South Carolina
- 100.0%
- free-lunch eligible
St. Johns High has class sizes smaller than 71% of South Carolina schools. Computed live against every South Carolina school reporting to NCES.
By Resource Investment Index, St. Johns High ranks #4 of 4 public schools in Johns Island, SC.
School address
District: Charleston 01 · South Carolina
NCES ID 450144000264 Verify on NCES CCD record →
Teachers (FTE)
31.0
Federal CCD staff survey
Students per teacher
12.6:1
vs 14.3:1 South Carolina avg
-12% vs state
Free-lunch eligible
100.0%
vs 74.0% South Carolina avg
+35% vs state
Student-teacher ratio in context
How St. Johns High compares with South Carolina and U.S. medians
What stands out at St. Johns High
St. Johns High is a high-poverty, mid-sized high school in Johns Island, South Carolina, enrolling 390 students.
Class sizes run a bit leaner than typical: 12.6:1 puts it in the smaller third of South Carolina schools by student-teacher ratio.
Its free-meal eligibility rate of 100.0% lands close to the South Carolina typical range, neither a high- nor low-need campus by this measure.
Enrollment of 390 puts it in the smaller third of South Carolina schools by headcount.
Its Resource Investment Index lands in the lower third of 1,214 scored South Carolina schools.
Against 331 statewide peers matched on enrollment and economic need, it ranks mid-pack at #201.
Its student body is led by Hispanic or Latino (41%) and African American (37%) (diversity index 66/100).
On the academic-pipeline side it reports 3 Advanced Placement courses.
Attendance runs somewhat below the norm, with 23.8% of students chronically absent per the 2021-22 civil-rights collection.
Discipline events run high: 109 in- and out-of-school suspensions were reported for 390 students in the 2021-22 Civil Rights Data Collection.
The federal civil-rights collection also records 3 expulsions at this campus for 2021-22.
Charleston 01 also operates Wando High (2,588 students) and Rb Stall High (2,135 students) alongside St. Johns High.
Sourced from NCES CCD, CRDC, and F-33 (federal records, not a quality verdict). How we source and compute this.
Source: National Center for Education Statistics Common Core of Data + CRDC + F-33 · 2024-25
How St. Johns High compares
St. Johns High on the metrics families compare, against South Carolina and U.S. means.
| Metric | This school | vs South Carolina | South Carolina avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 12.6:1 | ▼ 12% | 14.3:1 | 15.7:1 |
| Free-lunch eligible | 100.0% | ▲ 35% | 74.0% | 51.7% |
| Enrollment | 390 | top 72% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
12.6:1
Leaner classes than 70% of US schools, among the more generously staffed nationally.
390
Bigger than 46% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
100.0%
free-lunch eligible
- 35% above the South Carolina average of 74.0%
Above the 40% Title I schoolwide threshold; federal funds support the whole school, not individual students.
Staffing depth
12.6:1
students per teacher
- 12% below state mean
Top 29% in South Carolina - lower ratio than 71% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
23.8%
chronically absent (missed 10%+ of school days)
At or above 20%, the commonly used threshold for "high" chronic absenteeism, signaling significant barriers to regular attendance.
Funding equity
$15,213
per pupil, district-wide
- above South Carolina avg of $14,558
Somewhat below the U.S. average per-pupil spend; funding constraints may affect programs, facilities, and staffing.
Support staff
Counselors0.0 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
58
in-school suspensions + 51 out-of-school
Suspension rate: 14.9 per 100 students. Combined in-school and out-of-school rate: 27.9 per 100 students. Reported via the Civil Rights Data Collection. Includes 3 expulsions.
Overview
- Common Core of Data (June 2026): enrollment, staffing, and the student-teacher ratio above.
- Civil Rights Data Collection: discipline counts and program access (AP, gifted, special education).
- F-33 School District Finance Survey: the district-wide per-pupil spending figures below.
Three separate federal collections, each on its own reporting cadence - which is why this school's numbers line up on a consistent basis against every other school and state on this site, rather than mixing figures pulled from different survey years.
Student demographics
Hispanic or Latino 40.8%
African American 37.4%
White 19.7%
Two or More 1.5%
Asian 0.5%
Largest group: Hispanic or Latino at 40.8% of enrollment.
Student-body diversity index 65.5/100
Simpson diversity index - at 65.5, St. Johns High is more mixed than the South Carolina school average of 52.7.
Programs
AP courses offered 3
Funding & spending
District-wide per-pupil expenditure for Charleston 01, which includes St. Johns High.
$15,213
Per student
+4%
vs South Carolina
Avg $14,558
-8%
vs U.S.
Avg $16,593
Revenue mix
Local 59.0%
State 27.7%
Federal 13.3%
Source: NCES F-33 School District Finance Survey District-level finance · FY 2021-22 Per-pupil expenditure reflects the district-wide average. Individual school budgets are not reported at the federal level.
How St. Johns High Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Wando High | Larger | Lower economic need | Higher S:T ratio |
| Rb Stall High | Larger | Similar economic need | Higher S:T ratio |
| West Ashley High | Larger | Similar economic need | Higher S:T ratio |
| Lucy Garrett Beckham High | Larger | Lower economic need | Higher S:T ratio |
| James Island Charter High | Larger | Lower economic need | Higher S:T ratio |
Comparisons are relative to St. Johns High's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 2,588
- Students per teacher
- 17:1
- Resource Index
- 39/100
- Enrollment
- 2,135
- Students per teacher
- 17.4:1
- Resource Index
- 43/100
- Enrollment
- 2,069
- Students per teacher
- 18.6:1
- Resource Index
- 41/100
- Enrollment
- 1,757
- Students per teacher
- 18.9:1
- Resource Index
- 40/100
- Enrollment
- 1,612
- Students per teacher
- 15.2:1
- Resource Index
- 55/100
Similar high schools statewide
Matched by enrollment size and by staffing ratio across all of South Carolina, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~390 students)
Similar student-teacher ratio (~12.6:1)
Next steps
Verify locally before acting on St. Johns High's federal record.
- Compare St. Johns High against another school. Compare schools
- Charleston 01's spending and staffing shape this school. District profile
- Confirm current enrollment and boundaries with the school. Choosing guide
Federal record (CCD 2024-25, CRDC 2021-22) - PlainSchools assigns no subjective rating; the composite quality score is a transparent, reproducible index computed from this cited federal data.
Frequently asked questions about St. Johns High
How many students attend St. Johns High?
St. Johns High has 390 students enrolled. It is a high school in Johns Island, SC.
What is the student-teacher ratio at St. Johns High?
The student-teacher ratio at St. Johns High is 12.6:1, which is 12% lower than the South Carolina average of 14.3:1 and 20% lower than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What percentage of students receive free lunch at St. Johns High?
100.0% of students at St. Johns High are eligible for free lunch, compared to the South Carolina average of 74.0%.
What is the racial and ethnic makeup of St. Johns High?
The largest demographic group at St. Johns High is Hispanic or Latino at 40.8% of enrollment, in Johns Island, SC. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 65.5/100.
What is the Resource Investment Index for St. Johns High?
St. Johns High has a Resource Investment Index of 34/100 (typical reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, AP course offerings, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does St. Johns High rank among public schools in Johns Island?
By Resource Investment Index, St. Johns High ranks #4 of 4 public schools in Johns Island, SC. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all public schools in Johns Island on the city page.
Is St. Johns High a good school?
St. Johns High earns 34/100 on the Resource Investment Index, with class sizes smaller than 71% of South Carolina schools. This is a resource snapshot, not an academic rating; see the Resource Investment Index question above for what the number does and doesn't measure.
What other schools are in Charleston 01?
Besides St. Johns High, Charleston 01 also operates Wando High (2,588 students), Rb Stall High (2,135 students), and West Ashley High (2,069 students). See the Charleston 01 district page for the complete list.
Related tools
Every figure on PlainSchools is rendered directly from the source NCES, CRDC and F-33 federal records, no number is typed in by an editor. Each school's figures reflect its most recent NCES/CRDC submission on file. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of June 2026.