Irmo High

Irmo High is one of the middle-of-the-pack high schools in Columbia, South Carolina, run under Lexington 05, with 1,272 students on its rolls from grades 9 through 12. By comparison, South Carolina's public schools average about 953 students each, so Irmo High sits 33% above that benchmark.

Lexington 05 comprises 22 schools with combined enrollment of 17,053 students; Irmo High is among them.

On demographics, Irmo High shows that the largest single group is Black, at 58% of enrollment; the rest looks like 23% White, 8% Hispanic, 7% multiracial, 4% Asian. The wider county runs roughly 15% Black, putting the school's mix noticeably more Black than the area baseline.

On the resource side, On paper, Irmo High has 107 full-time-equivalent teachers, translating to a class-load average of around 11.9:1. Statewide, the average ratio sits near 15.5:1, putting Irmo High tighter than the state norm the norm.

Around the school, census data for Lexington County shows the typical household earns roughly $77,408 per year, roughly 34% of adults have completed at least a four-year degree, and the poverty rate sits near 9%. Irmo High is one of 76 public schools in Lexington County (combined enrollment of about 64,555 students).

Nearest neighbor: Irmo Middle, around 0.3 miles off. Within five miles, there are 8 other public schools.

Geographically, the school is in a bedroom-community area.

Over the past 7-year window. Over the past 7-year window, the student count declined 6%: 1,348 students in 2018 compared to 1,272 in 2025. Over the same period, the White share declined from 33% to 23%.

In the discussion threads here, the page collects discussion, questions, and updates around enrollment questions, classroom assignments, and PTA news. The community welcomes input from current and former families.