Serving 1,090 students in grades 9-12, Glenbard South High School ranks in the top 20% of all schools in Illinois for overall test scores (math proficiency is top 20%, and reading proficiency is top 20%).
The percentage of students achieving proficiency in math is 47% (which is higher than the Illinois state average of 27%). The percentage of students achieving proficiency in reading/language arts is 50% (which is higher than the Illinois state average of 30%).
The student-teacher ratio of 16:1 is higher than the Illinois state level of 13:1.
Minority enrollment is 44% of the student body (majority Hispanic and Asian), which is lower than the Illinois state average of 55% (majority Hispanic).
Quick Facts (26-27)
- Grades: 9-12
- Enrollment: 1,090 students
- Student-Teacher Ratio: 16:1
- Minority Enrollment: 44%
- Graduation Rate: 94% (Top 20% in IL)
- Overall Testing Rank: Top 20%
- Math Proficiency: 47% (Top 20%)
- Reading Proficiency: 50% (Top 20%)
- Science Proficiency: 69% (Top 20%)
- Attendance Zone: Glenbard South High School serves the southern part of Glen Ellyn, IL, covering an area of approximately 9.3 square miles. Families within this zone typically have a drive of 5 to 10 minutes to the school, with the furthest edge being about 3.3 miles away.
- Source: National Center for Education Statistics (NCES), IL Dept. of Education
Top Rankings
Glenbard South High School ranks among the top 20% of public schools in Illinois for:
Category
Attribute
Overall Rank
Most improved public schools
Math Proficiency
Reading/Language Arts Proficiency
Science Proficiency
Graduation Rate
School Overview
Glenbard South High School's student population of 1,090 students has stayed relatively flat over five school years.
The teacher population of 69 teachers has stayed relatively flat over five school years.
Grades Offered
Grades 9-12
Total Students
1,090 students
Showing 2016–2025. Full 39-year historical data available below ↓
Total Classroom Teachers
69 teachers
Showing 2015–2025. Full 39-year historical data available below ↓
Year Founded
1972
School Rankings
Glenbard South High School ranks within the top 20% of all 3,542 schools in Illinois (based off of combined math and reading proficiency testing data).
The diversity score of Glenbard South High School is 0.63, which is less than the diversity score at state average of 0.70. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#435 out of 3542 schools
(Top 20%)
(Top 20%)
Showing 2013–2023. Full 14-year historical data available below ↓
Math Test Scores (% Proficient)
47%
27%
Showing 2012–2023. Full 14-year historical data available below ↓
Reading/Language Arts Test Scores (% Proficient)
50%
30%
Showing 2012–2022. Full 13-year historical data available below ↓
Science Test Scores (% Proficient)
69%
50%
Student-Teacher Ratio
16:1
13:1
Showing 2015–2025. Full 39-year historical data available below ↓
Asian
12%
6%
Showing 2016–2025. Full 38-year historical data available below ↓
Hispanic
18%
29%
Showing 2016–2025. Full 38-year historical data available below ↓
Black
10%
16%
Showing 2016–2025. Full 38-year historical data available below ↓
White
56%
45%
Showing 2016–2025. Full 38-year historical data available below ↓
Two or more races
4%
4%
Showing 2016–2025. Full 15-year historical data available below ↓
All Ethnic Groups
Showing 2016–2025. Full 38-year historical data available below ↓
Graduation Rate
94%
87.6%
Chronically Absent Students
(22-23)20.4%
29.7%
Eligible for Free Lunch
22%
43%
Showing 2015–2025. Full 24-year historical data available below ↓
Eligible for Reduced Lunch
7%
4%
Showing 2010–2025. Full 23-year historical data available below ↓
School Statewide Testing
School District Name
Sports
Colors
Red, White, and Blue
School Mascot
Raider
Source: National Center for Education Statistics (NCES), IL Dept. of Education
Frequently Asked Questions
What is Glenbard South High School's ranking?
Glenbard South High School is ranked #435 out of 3,542 schools, which ranks it among the top 20% of public schools in Illinois.
What schools are Glenbard South High School often compared to?
Glenbard South High Schoolis often viewed alongside schools like Glenbard West High School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
47% of students have achieved math proficiency (compared to the 27% IL state average), while 50% of students have achieved reading proficiency (compared to the 30% IL state average).
What is the graduation rate of Glenbard South High School?
The graduation rate of Glenbard South High School is 94%, which is higher than the Illinois state average of 87.6%.
How many students attend Glenbard South High School?
1,090 students attend Glenbard South High School.
What is the racial composition of the student body?
56% of Glenbard South High School students are White, 18% of students are Hispanic, 12% of students are Asian, 10% of students are Black, and 4% of students are Two or more races.
What is the student-teacher ratio of Glenbard South High School?
Glenbard South High School has a student ration of 16:1, which is higher than the Illinois state average of 13:1.
What grades does Glenbard South High School offer ?
Glenbard South High School offers enrollment in grades 9-12
What school district is Glenbard South High School part of?
Glenbard South High School is part of Glenbard TWP HSD 87 School District.
School Calendar
View the Glenbard South High School yearly calendar below. Note key dates such as:
Event
Date
No School Thanksgiving Break
November 25, 2026 (Wednesday)
School Reviews
5 10/10/2025
The academics are excellent at south and there are many opportunities for learning there. There is not doubt that most students go on to have good lives after south. The facilities are good, with a weight room and fitness room. Drug rates are low. Not a lot happens at south. We take pride in that. Fights are uncommon, and they usually only consist of threats or pushes. We have a lot of extracurricular and they are all famous throughout the state. Our sports are pretty good. Parents are involved! Parents fill in when we need help, and they pay for everything. The only things that I would consider are that we are a school in a very good neighborhood, it feels very safe. The other thing is that academics are our thing at south. And the workload is crazy compared to other schools (regular/honors track), but that’s why we do so well. Everyone is nice to everyone else. We have great teachers, most with a lot of experience. There are a lot of ways to get help if you need it. Also we have so many ways that you can relate with others. We have many clubs to help with that for example: Otaku Club (anime/DDR), Asian Club, International Club, Latin Club, Spanish Club, French Club, Gay Straight Alliance, H20 (for muslims-i think), Students for students (SADD, students against destructive decisions), Student Union, Presidents Club (club leaders meet), Southwinds (literary magazine), Yearbook, and if we don’t have it you can start it. Presidents club got started this year because a student requested it! We also have some great academic teams like: Mock Trial (pretend to be lawyers, like debate), Forensics Team (like speech team), Model UN (learn about different countries and present), Science Olympiad (different scientific events), Chess Team, Scholastic Bowl (like jeopardy except not in the form of a question and in teams). Great School, Great School. Worth it, good education.
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