Grayslake Central High School


Student Enrollment
Best High School in Illinois
 Rating 9 out of 10
Grades 9 to 12th grade
School District Grayslake Community High School District 127
Type Public
 Phone (847)986-3300
 Location 400 N Lake St
Grayslake, IL 60030
Charter School No

Grayslake Central High School has an academic rating significantly above the average for Illinois high schools based on its average test performance, high graduation rate and high AP course participation. It is ranked 46th in the best public high schools in Illinois.



The Grayslake Central High School student body is primarily White with a smaller Hispanic population and has medium racial diversity.

Race Percent Students
Asian Pacific8.6%126
Native American Indian0.1%1
Hawaiian Pacific Inlander0.2%3
Two or more races4.2%61

Family Income

vs. other Illinois high schools
Upper 4.5%

11.9% percent of the school's students are eligible for free lunch under the National School Lunch Program compared to the Illinois high school median of 42.4%. By this measure, Grayslake Central High School students are largely wealthy and rank 30th in Illinois for high school student family income.

Enrollment by Grade

Grade Students



Graduation Rate

10 out of 10

Rank: 19th in Illinois

Subgroup Graduation Rate
All Students96%
Illinois Median87%
White95% or more*
Black50% or more*
Hispanic95% or more*
Asian Pacific90% or more*
Native American-
Two or more races80% or more*
Economically Disadvantaged90% or more*
Limited English Proficiency50% or more*

*Indicates statistic has been anonymized to protect student privacy.

State Standardized Test Performance

6 out of 10

Rank: 224th in Illinois

Students at Grayslake Central High School scored an average 31% of students proficient for math and reading as tested by the Illinois State Board of Education. Performance is slightly above the state high school median of 24% proficiency and places the school's test performance in the top 36.3% of Illinois high schools.

Test Proficiency By Gender

Gender Math Proficient Reading Proficient
Girls5% or less*60% to 64%*
Boys10% to 14%*45% to 49%*

State Test Proficiency by Subgroup

Subgroup Math Proficient Reading Proficient
American Indian--
Asian & Pacific Islandersuppressed*80% or more*
Blackless than 50%*21% to 39%*
Hispanic5% or less*35% to 39%*
Multiracialless than 50%*50% or more*
White10% to 14%*60% to 64%*
With Disabilites10% or less*20% to 29%*
Limited English20% or less*less than 50%*

*Indicates statistic has been anonymized to protect student privacy.

College Admission Test Scoring

Average ACT Score

The average ACT score for Grayslake Central High School students in 2017 was 23.3. This indicates that the average student scores in the 68th percentile nationally on the ACT.

College Admission Test Participation

8 out of 10

Rank: 111st in Illinois

458 out of 732 junior and senior of students took either the ACT or SAT test (63%). College admission testing participation is well above the Illinois median rate of 53% and in the top 19% for participation.

AP Course and Test Performance

8 out of 10

Rank: 57th in Illinois

Grayslake Central High School offers 18 AP courses. 34 percent of grade nine through twelve students are enrolled in at least one AP class. The AP participation rate is in the 90% percentile and well above the median AP enrollment rate for all Illinois schools of 16%. Grayslake Central High School had 427 taking AP exams with a 353 passing at least one exam. The AP pass rate is in the 83% percentile and well above the state median of 57 percent.

School State
AP Test Pass Rate 83% 57%
Students enrolled in an AP class 34% 16%
AP Math Enrollment Rate 8%
AP Science Enrollment Rate 11%
AP Other Enrollment Rate 31%
AP Courses Offered 18

Learning Environment

Absenteeism Rate

School State
Overall Chronic Absenteeism Rate9%17%
Female Chronic Absenteeism Rate7%
Male Chronic Absenteeism Rate10%

Safety and Discipline

Police Referral Rate

Group Percent Referrals
All Students0%0
Illinois Median0%

Police Arrest Rate

Group Percent Arrests
All Students0%0

Expulsion Rate

Group Percent Expulsions
All Students0%0
Illinois Median0%

In-School Suspension Rate

Group Percent Suspensions
All Students3%43
Illinois Median4.6%

Out-of-School Suspension Rate

Group Percent Suspensions
All Students0.7%10


Grayslake Central High School
400 N Lake St
Grayslake, IL

10 out of 10 1


Grayslake Community High School District 127
Grayslake, IL