For the 2026-27 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 (2026-27)
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%
Clark County Public Schools (Closed)
School
Location
Quick Facts
401 East Main St
Casey, IL 62420
(217) 932-2177
Casey, IL 62420
(217) 932-2177
Gr: 7-8 | 153 students Student-teacher ratio: 17:1 Minority enrollment: 5%
H E L P Martinsville Elementary School (Closed 2023)
Special Education School
Po Box 396
Martinsville, IL 62442
(217) 382-4338
Martinsville, IL 62442
(217) 382-4338
300 West Cumberland
Martinsville, IL 62442
(217) 382-4132
Martinsville, IL 62442
(217) 382-4132
Gr: 7-8
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: Martinsville Jr- Sr High School vs. Casey-westfield Jr/sr High School, Marshall High School vs. Casey-westfield Jr/sr High School, Martinsville Jr- Sr High School vs. Marshall High School
Recent Articles
How Much Choice Do High School Students Have?
Learn how graduation requirements, prerequisites, electives, staffing, scheduling conflicts, AP courses, dual enrollment, and career pathways determine how much control high school students have over schedules each year.
Does Your Child Need More Recess?
Explore whether your child may benefit more from recess than another academic period, including research on attention, learning, physical activity, stress, social development, and school-day balance today.
Combined Grade Classrooms, What Parents Should Know
Learn how combined-grade classrooms work, why public schools use them, potential benefits and challenges, and the questions parents should ask before enrolling their child in one today.