Thornwood High School is a public high school located in South Holland, Illinois, United States. It was built as part of Thornton Township High School District 205. It opened in 1971 to accommodate overcrowding at other District 205 schools, Thornridge High and Thornton Township High School.
Serving 1,843 students in grades 9-12, Thornwood High School ranks in the bottom 50% of all schools in Illinois for overall test scores (math proficiency is bottom 50%, and reading proficiency is bottom 50%).
The percentage of students achieving proficiency in math is 6% (which is lower than the Illinois state average of 27%). The percentage of students achieving proficiency in reading/language arts is 8% (which is lower than the Illinois state average of 30%).
The student-teacher ratio of 13:1 is equal to the Illinois state level of 13:1.
Minority enrollment is 98% of the student body (majority Black), which is higher than the Illinois state average of 55% (majority Hispanic and Black).
Quick Facts (26-27)
- Grades: 9-12
- Enrollment: 1,843 students
- Student-Teacher Ratio: 13:1
- Minority Enrollment: 98%
- Graduation Rate: 88% (Top 50% in IL)
- Overall Testing Rank: Bottom 50%
- Math Proficiency: 6% (Btm 50%)
- Reading Proficiency: 8% (Btm 50%)
- Science Proficiency: 10% (Btm 50%)
- Attendance Zone: Thornwood High School serves the southeastern part of South Holland, IL, covering an area of approximately 16.1 square miles. Families within this zone typically have a 5-10 minute drive to the school, with the furthest edge being about 4 miles away.
- Source: National Center for Education Statistics (NCES), IL Dept. of Education
School Overview
Thornwood High School's student population of 1,843 students has declined by 7% over five school years.
The teacher population of 143 teachers has stayed relatively flat over five school years.
Grades Offered
Grades 9-12
Total Students
1,843 students
Showing 2016–2025. Full 39-year historical data available below ↓
Total Classroom Teachers
143 teachers
Showing 2015–2025. Full 39-year historical data available below ↓
Year Founded
1972
School Calendar
School Motto
We build world-ready learners.
School Rankings
Thornwood High School ranks within the bottom 50% of all 3,542 schools in Illinois (based off of combined math and reading proficiency testing data).
The diversity score of Thornwood High School is 0.31, 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
#3192 out of 3542 schools
(Bottom 50%)
(Bottom 50%)
Showing 2013–2023. Full 14-year historical data available below ↓
Math Test Scores (% Proficient)
6%
27%
Showing 2012–2023. Full 14-year historical data available below ↓
Reading/Language Arts Test Scores (% Proficient)
8%
30%
Showing 2012–2022. Full 13-year historical data available below ↓
Science Test Scores (% Proficient)
10%
50%
Student-Teacher Ratio
13:1
13:1
Showing 2015–2025. Full 39-year historical data available below ↓
Hispanic
14%
29%
Showing 2016–2025. Full 38-year historical data available below ↓
Black
82%
16%
Showing 2016–2025. Full 38-year historical data available below ↓
White
2%
45%
Showing 2016–2025. Full 38-year historical data available below ↓
Two or more races
2%
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
88%
87.6%
Chronically Absent Students
(22-23)50.8%
29.7%
Eligible for Free Lunch
8%
43%
Showing 2015–2025. Full 24-year historical data available below ↓
Eligible for Reduced Lunch (12-13)
6%
5%
School Statewide Testing
School District Name
Sports
Colors
Navy Blue, Gold
Source: National Center for Education Statistics (NCES), IL Dept. of Education
Frequently Asked Questions
What is Thornwood High School's ranking?
Thornwood High School is ranked #3192 out of 3,542 schools, which ranks it among the bottom 50% of public schools in Illinois.
What schools are Thornwood High School often compared to?
Thornwood High Schoolis often viewed alongside schools like Thornton Fractnl So High School, Thornridge High School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
6% of students have achieved math proficiency (compared to the 27% IL state average), while 8% of students have achieved reading proficiency (compared to the 30% IL state average).
What is the graduation rate of Thornwood High School?
The graduation rate of Thornwood High School is 88%, which is higher than the Illinois state average of 87.6%.
How many students attend Thornwood High School?
1,843 students attend Thornwood High School.
What is the racial composition of the student body?
82% of Thornwood High School students are Black, 14% of students are Hispanic, 2% of students are White, and 2% of students are Two or more races.
What is the student-teacher ratio of Thornwood High School?
Thornwood High School has a student ration of 13:1, which is equal to the Illinois state average of 13:1.
What grades does Thornwood High School offer ?
Thornwood High School offers enrollment in grades 9-12
What school district is Thornwood High School part of?
Thornwood High School is part of Thornton TWP HSD 205 School District.
School Reviews
1 10/10/2025
Thornwood was one of the BEST high schools in the country when I went there...... what happened?
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