St. Johns High

Located at 1518 Main Road, in Johns Island, South Carolina, St. Johns High is a tight-knit high school that educates 390 students (grades 9 through 12), operated by Charleston 01. That puts it 59% leaner than the typical public school in South Carolina, which averages around 953 students.

Within Charleston 01, which oversees 81 schools and 52,009 students, St. Johns High is one campus in the system.

On the student-mix side, St. Johns High reports that the largest single group is Hispanic at 41%, but no single group is in the majority; the rest comes out to 37% Black, 20% White. The wider county runs roughly 7% Hispanic, putting the school's mix noticeably more Hispanic than the area baseline.

In terms of school funding signals, St. Johns High reports 34 full-time-equivalent teachers, putting the student-to-teacher ratio at about 11.5:1. Statewide, the average ratio sits near 15.5:1, putting St. Johns High tighter than the state norm the norm.

Across the wider county, ACS estimates for Charleston County put the typical household earns roughly $88,494 per year, 50% of adults hold a bachelor's degree or higher, and roughly 7% of residents live below the federal poverty line. In all, Charleston County runs 98 public schools (combined enrollment of about 55,933 students), of which St. Johns High is one.

Angel Oak Elementary is the nearest neighboring public school, about 0.3 miles from this campus. 3 of the 8 nearest public schools sit inside a five-mile radius.

St. Johns High operates from an urban location.

Trend over the last 7 years. Looking back 7 years, enrollment at St. Johns High has grew 21%, going from 321 students in 2018 to 390 in 2025. Over the same period, the Black share shrank from 58% to 37%.

On this page, members of the St. Johns High community share and discuss fundraisers, lost-and-found posts, and report-card season. Anyone with firsthand experience at this school can post or comment.