For the 2026 school year, there are 6 public high schools serving 2,890 students in Williamson County, IL.
The top-ranked public high schools in Williamson County, IL are Carterville High School, Herrin High School and Project Echo. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.
Williamson County, IL public high schools have an average math proficiency score of 18% (versus the Illinois public high school average of 26%), and reading proficiency score of 32% (versus the 29% statewide average). High schools in Williamson County have an average ranking of 7/10, which is in the top 50% of Illinois public high schools.
Williamson County, IL public high school have a Graduation Rate of 85%, which is less than the Illinois average of 87%.
The school with highest graduation rate is Carterville High School, with 90-94% graduation rate. Read more about public school graduation rate statistics in Illinois or national school graduation rate statistics.
Minority enrollment is 19% of the student body (majority Black and Hispanic), which is less than the Illinois public high school average of 55% (majority Hispanic).
Best Public High Schools in Williamson County (2026)
School
(Math and Reading Proficiency)
(Math and Reading Proficiency)
Location
Quick Facts
Rank: #11.
Carterville High School
(Math: 30-34% | Reading: 45-49%)
Rank:
Rank:
8/
Top 30%10
1415 W Grand Ave
Carterville, IL 62918
(618) 985-2940
Carterville, IL 62918
(618) 985-2940
Gr: 9-12 | 647 students Student-teacher ratio: 17:1 Minority enrollment: 20%
Rank: #22.
Herrin High School
(Math: 15-19% | Reading: 25-29%)
Rank:
Rank:
5/
Bottom 50%10
700 N 10th St
Herrin, IL 62948
(618) 942-6606
Herrin, IL 62948
(618) 942-6606
Gr: 9-12 | 667 students Student-teacher ratio: 14:1 Minority enrollment: 16%
Rank: #33.
Project Echo
Alternative School
(Math: ≤20% | Reading: ≤20% )
Rank:
Rank:
5/
Bottom 50%10
17428 Route 37
Johnston City, IL 62951
(618) 983-6628
Johnston City, IL 62951
(618) 983-6628
Gr: 7-12
Rank: #44.
Johnston City High School
(Math: 15-19% | Reading: 20-24%)
Rank:
Rank:
5/
Bottom 50%10
1500 Jefferson Ave
Johnston City, IL 62951
(618) 983-4700
Johnston City, IL 62951
(618) 983-4700
Gr: 9-12 | 330 students Student-teacher ratio: 12:1 Minority enrollment: 11%
Rank: #55.
Marion High School
(Math: 11% | Reading: 30%)
Rank:
Rank:
4/
Bottom 50%10
1501 S Carbon St
Marion, IL 62959
(618) 993-8196
Marion, IL 62959
(618) 993-8196
Gr: 9-12 | 1,105 student Student-teacher ratio: 13:1 Minority enrollment: 24%
Rank: #66.
Crab Orchard High School
(Math: ≤20% | Reading: 11-19%)
Rank:
Rank:
4/
Bottom 50%10
19189 Bailey St
Marion, IL 62959
(618) 982-2181
Marion, IL 62959
(618) 982-2181
Gr: 9-12 | 141 students Student-teacher ratio: 10:1 Minority enrollment: 4%
Williamson County Public Schools (Closed)
School
Location
Quick Facts
Chittyville Alternative Center (Closed 2023)
Special Education School
700 N 10th
Herrin, IL 62948
(618) 942-6625
Herrin, IL 62948
(618) 942-6625
Gr: 7-12 | 24 students Student-teacher ratio: 4:1 Minority enrollment: 29%
Frequently Asked Questions
What are the top-ranked public high schools in Williamson County, IL?
The top-ranked public high schools in Williamson County, IL include Carterville High School, Herrin High School and Project Echo.
How many public high schools are located in Williamson County?
6 public high schools are located in Williamson County.
What is the racial composition of students in Williamson County?
Williamson County public high schools minority enrollment is 19% of the student body (majority Black and Hispanic), which is less than the Illinois public high schools average of 55% (majority Hispanic).
Which public high schools in Williamson County are often viewed compared to one another?
Popular comparisons of public high schools in Williamson County include: Herrin High School vs. Carterville High School, Carterville High School vs. Herrin High School, Marion High School vs. Johnston City High School
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