Downers Grove South High School, or DGS, and locally referred to as "South", is a public four-year high school located at the corner of Dunham Road and 63rd Street in Downers Grove, Illinois, a western suburb of Chicago, Illinois, in the United States. Its principal is Arwen Lyp.
Serving 2,591 students in grades 9-12, Community H S Dist 99 - South High School ranks in the top 30% 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 43% (which is higher than the Illinois state average of 27%). The percentage of students achieving proficiency in reading/language arts is 34% (which is higher than the Illinois state average of 30%).
The student-teacher ratio of 15:1 is higher than the Illinois state level of 13:1.
Minority enrollment is 46% of the student body (majority Hispanic), which is lower than the Illinois state average of 55% (majority Hispanic).
Quick Facts (2026)
- Grades: 9-12
- Enrollment: 2,591 students
- Student-Teacher Ratio: 15:1
- Minority Enrollment: 46%
- Graduation Rate: 92% (Top 20% in IL)
- Overall Testing Rank: Top 30%
- Math Proficiency: 43% (Top 20%)
- Reading Proficiency: 34% (Top 50%)
- Science Proficiency: 60% (Top 50%)
- Source: National Center for Education Statistics (NCES), IL Dept. of Education
Top Rankings
Community H S Dist 99 - South High School ranks among the top 20% of public schools in Illinois for:
Category
Attribute
Most improved public schools
Math Proficiency
Graduation Rate
Diversity
School Overview
Community H S Dist 99 - South High School's student population of 2,591 students has declined by 7% over five school years.
The teacher population of 176 teachers has stayed relatively flat over five school years.
Grades Offered
Grades 9-12
Total Students
2,591 students
Total Classroom Teachers
176 teachers
Year Founded
1964
Colors
Navy Blue, Columbia blue
School Calendar
School Rankings
Community H S Dist 99 - South High School ranks within the top 30% of all 3,542 schools in Illinois (based off of combined math and reading proficiency testing data).
The diversity score of Community H S Dist 99 - South High School is 0.64, which is less than the diversity score at state average of 0.69. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#907 out of 3542 schools
(Top 30%)
(Top 30%)
Math Test Scores (% Proficient)
43%
27%
Reading/Language Arts Test Scores (% Proficient)
34%
30%
Science Test Scores (% Proficient)
60%
50%
Student-Teacher Ratio
15:1
13:1
American Indian
n/a
n/a
Asian
7%
6%
Hispanic
23%
29%
Black
11%
16%
White
54%
45%
Hawaiian
1%
n/a
Two or more races
4%
4%
All Ethnic Groups
Graduation Rate
92%
87%
Eligible for Free Lunch
23%
43%
Eligible for Reduced Lunch
7%
4%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), IL Dept. of Education
School Notes
- School Mascot: Marty The Mustang
Frequently Asked Questions
What is Community H S Dist 99 - South High School's ranking?
Community H S Dist 99 - South High School is ranked #907 out of 3,542 schools, which ranks it among the top 30% of public schools in Illinois.
What schools are Community H S Dist 99 - South High School often compared to?
Community H S Dist 99 - South High Schoolis often viewed alongside schools like Community H S Dist 99 - North High School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
43% of students have achieved math proficiency (compared to the 27% IL state average), while 34% of students have achieved reading proficiency (compared to the 30% IL state average).
What is the graduation rate of Community H S Dist 99 - South High School?
The graduation rate of Community H S Dist 99 - South High School is 92%, which is higher than the Illinois state average of 87%.
How many students attend Community H S Dist 99 - South High School?
2,591 students attend Community H S Dist 99 - South High School.
What is the racial composition of the student body?
54% of Community H S Dist 99 - South High School students are White, 23% of students are Hispanic, 11% of students are Black, 7% of students are Asian, 4% of students are Two or more races, and 1% of students are Hawaiian.
What is the student-teacher ratio of Community H S Dist 99 - South High School?
Community H S Dist 99 - South High School has a student ration of 15:1, which is higher than the Illinois state average of 13:1.
What grades does Community H S Dist 99 - South High School offer ?
Community H S Dist 99 - South High School offers enrollment in grades 9-12
What school district is Community H S Dist 99 - South High School part of?
Community H S Dist 99 - South High School is part of CHSD 99 School District.
School Reviews
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