For the 2026 school year, there are 3 public high schools serving 851 students in Clark County, IL.
The top-ranked public high schools in Clark County, IL are Casey-westfield Jr/sr High School, Marshall High School and Martinsville Jr- Sr High School. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.
Clark County, IL public high schools have an average math proficiency score of 17% (versus the Illinois public high school average of 26%), and reading proficiency score of 31% (versus the 29% statewide average). High schools in Clark County have an average ranking of 7/10, which is in the top 50% of Illinois public high schools.
Clark County, IL public high school have a Graduation Rate of 82%, which is less than the Illinois average of 87%.
The school with highest graduation rate is Casey-westfield Jr/sr High School, with 85-89% graduation rate. Read more about public school graduation rate statistics in Illinois or national school graduation rate statistics.
Minority enrollment is 6% of the student body (majority Hispanic), which is less than the Illinois public high school average of 55% (majority Hispanic).
Best Public High Schools in Clark County (2026)
School
(Math and Reading Proficiency)
(Math and Reading Proficiency)
Location
Quick Facts
Rank: #11.
Casey-westfield Jr/sr High School
(Math: 20-24% | Reading: 30-34%)
Rank:
Rank:
6/
Top 50%10
306 E Edgar Ave
Casey, IL 62420
(217) 932-2175
Casey, IL 62420
(217) 932-2175
Gr: 7-12 | 361 students Student-teacher ratio: 13:1 Minority enrollment: 6%
Rank: #22.
Marshall High School
(Math: 15-19% | Reading: 35-39%)
Rank:
Rank:
6/
Top 50%10
806 N 6th St
Marshall, IL 62441
(217) 826-2395
Marshall, IL 62441
(217) 826-2395
Gr: 9-12 | 350 students Student-teacher ratio: 11:1 Minority enrollment: 7%
Rank: #33.
Martinsville Jr- Sr High School
(Math: ≤5% | Reading: 20-24%)
Rank:
Rank:
3/
Bottom 50%10
300 W Cumberland
Martinsville, IL 62442
(217) 382-4132
Martinsville, IL 62442
(217) 382-4132
Gr: 7-12 | 146 students Student-teacher ratio: 9:1 Minority enrollment: 5%
Frequently Asked Questions
What are the top-ranked public high schools in Clark County, IL?
The top-ranked public high schools in Clark County, IL include Casey-westfield Jr/sr High School, Marshall High School and Martinsville Jr- Sr High School.
How many public high schools are located in Clark County?
3 public high schools are located in Clark County.
What is the racial composition of students in Clark County?
Clark County public high schools minority enrollment is 6% of the student body (majority Hispanic), which is less than the Illinois public high schools average of 55% (majority Hispanic).
Which public high schools in Clark County are often viewed compared to one another?
Popular comparisons of public high schools in Clark County include: Marshall High School vs. Martinsville Jr- Sr High School
Recent Articles
Media Literacy as a Core Skill: How to Tell if a School Teaches It Well
Learn how to evaluate whether a public school teaches media literacy effectively, from fact-checking and source evaluation to digital citizenship and critical thinking.
Screen Time, Paper Learning, and the New Back-to-Basics Debate
Explore why some public schools are reducing screen time, bringing back paper learning, and rethinking the balance between technology and traditional instruction.
Student Data, AI Tools, and Privacy: Questions to Ask Your District
Learn how public schools use AI, protect student data, and the key privacy questions every parent should ask their school district in 2026.