Johnsburg High School

Johnsburg High School, a tight-knit high school in Johnsburg, Illinois, part of Johnsburg CUSD 12, works with 502 students, covering grades 9 through 12. That puts it 40% smaller than the typical public school in Illinois, which averages around 834 students.

Within Johnsburg CUSD 12, which oversees 4 schools and 1,681 students, Johnsburg High School is one campus in the system.

Demographically, Johnsburg High School lists that nearly all students (83%) are White. Other groups include 10% Hispanic, 4% multiracial. That composition is broadly in line with McHenry County as a whole.

On the resource side, On paper, Johnsburg High School has 38 full-time-equivalent teachers, translating to a class-load average of around 13.2:1. That tracks the state average closely. Around 32% of the student body qualifies for free or reduced-price meals, often used as a Title I proxy.

After controlling for student poverty, Johnsburg High School performs roughly as the BeatsExpectations model predicts for a school with this FRL share. The predicted value is around 53.0%, the actual is 44.3%, a residual of -8.7 points.

In the area at large, community-level numbers for McHenry County indicate median household income runs about $104,802, roughly 35% of adults have completed at least a four-year degree, and roughly 4% of residents live below the federal poverty line. Across McHenry County's 89 public schools (combined enrollment of about 50,123 students), Johnsburg High School is one campus in the mix.

The closest other public school is Johnsburg Jr High School, roughly 1.3 miles away. Within five miles, there are 8 other public schools. Ranking that nearby cluster on reported proficiency puts Johnsburg High School at 2nd of 8; the average score across the group is 40.6%.

The campus sits in a commuter-belt setting.

Five-year trend. Over the past 7-year window, the student count fell 20%: 628 students in 2018 compared to 502 in 2025. The White share of enrollment shrank from 90% to 83% over that span.

On this page, posts here usually surface around open house dates, ride-share offers, and field-trip permission slips. Contributors range from current parents to recent graduates and teachers.