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Crystal Lake Central High School

45 W Franklin Ave, Crystal Lake, IL 60014

ASchola Grade
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Grades
9–12
High
Students
1,443
Enrolled 2024–25
Students per teacher
16.9 : 1
Full-time teachers
District
Chsd 155
McHenry County

Schola Grade A · Excellent

Letter grade (A–F) · compared with 684 Illinois high schools · How we grade
Test scores34% proficient in math & reading
77thpercentile
Equity17% of low-income students proficient
71stpercentile
Attendance29% chronically absent
53rdpercentile
Graduation rate96% graduate in 4 years
91stpercentile
College readinessAt least 46% take AP, IB or dual-enrollment courses
92ndpercentile
Class size16.9 students per teacher
12thpercentile

Percentiles compare this school with other Illinois high schools; the line marks the middle. Data: test scores 2021–22, graduation and absenteeism 2022–23 (U.S. Department of Education, EDFacts); coursework 2023–24 (Civil Rights Data Collection); staffing 2024–25 (NCES).

About Crystal Lake Central High School

Crystal Lake Central High School is a public high school in Crystal Lake, Illinois, serving grades 9–12. It is part of Chsd 155. The school is located in a large suburb in McHenry County.

In the 2024–25 school year, 1,443 students were enrolled, with about 16.9 students for every full-time teacher. That ratio is larger than the typical Illinois high school (13.3 students per teacher). Its Schola Grade is A (excellent), compared with 684 Illinois high schools.

Grades & enrollment

Students per grade, 2024–25Grades 9–12

Location & nearby schools

45 W Franklin Ave
Crystal Lake, IL 60014
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School details

Type
Public School · What this means
Level
High
Grades offered
9–12
Enrollment (2024–25)
1,443 students
Students per teacher
16.9 to 1
AP courses offered
16
Charter school
No
Magnet school
No
Locale
Suburb — Large
School district
Chsd 155
County
McHenry County
NCES school ID
171137001367

Schools near Crystal Lake Central High School

All 23 schools in Crystal Lake →

School data comes from the U.S. Department of Education: the National Center for Education Statistics (NCES) Common Core of Data and EDGE school locations (2024–25) and Private School Survey (2023–24), the Civil Rights Data Collection (2023–24), and EDFacts (test results 2021–22; graduation and chronic absenteeism 2022–23), plus other public sources. Please contact the school to confirm enrollment, programs, and other details. How we source data.