Best Public High Schools in Williamson County (2025-26)

Best Williamson County Public High Schools (2025-26)

For the 2025-26 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 score of 18% (versus the Illinois public high school average of 26%), and 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 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 (2025-26)

School
(Math and Reading Proficiency)

Location

Quick Facts

Rank: #11.

Carterville High School

(Math: 30-34% | Reading: 45-49%)
:

Top 30%

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1415 W Grand Ave
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%)
:

Bottom 50%

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700 N 10th St
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% )
:

Bottom 50%

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17428 Route 37
Johnston City, IL 62951
(618) 983-6628

Gr: 7-12

Rank: #44.

Johnston City High School

(Math: 15-19% | Reading: 20-24%)
:

Bottom 50%

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1500 Jefferson Ave
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%)
:

Bottom 50%

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1501 S Carbon St
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%)
:

Bottom 50%

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19189 Bailey St
Marion, IL 62959
(618) 982-2181

Gr: 9-12 | 141 students Student-teacher ratio: 10:1 Minority enrollment: 4%

[+] Show Closed Public Schools in Williamson County, IL

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

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