Home > Illinois > Lake County > Grayslake

Grayslake Central High School

( shown in map)

Top 20%

central.d127.org

Grayslake Central High School is a public four-year high school located in Grayslake, Illinois and is part of Grayslake Community High School District 127. Founded in 1946, the school services the Chicago suburbs of Grayslake, Hainesville, and parts of Round Lake. The school's mascot is the Ram.

Serving 1,375 students in grades 9-12, Grayslake Central High School ranks in the top 20% of all schools in Illinois for overall test scores (math proficiency is top 20%, and reading proficiency is top 20%).

The percentage of students achieving is 43% (which is higher than the Illinois state average of 28%). The percentage of students achieving is 47% (which is higher than the Illinois state average of 30%).

The student:teacher ratio of 13:1 is equal to the Illinois state level of 13:1.

Minority enrollment is 42% of the student body (majority Hispanic), which is lower than the Illinois state average of 55% (majority Hispanic).

Quick Stats (2025)

Grades: 9-12
Enrollment: 1,375 students
Student:Teacher Ratio: 13:1
Minority Enrollment: 42%
: 91% (Top 50% in IL)
: Top 20%
: 43% (Top 20%)
: 47% (Top 20%)
: 67% (Top 20%)
Source: National Center for Education Statistics (NCES), IL Dept. of Education

Top Rankings

Grayslake Central High School ranks among the top 20% of public schools in Illinois for:

School Overview

Grayslake Central High School's student population of 1,375 students has stayed relatively flat over five school years.

The teacher population of 104 teachers has grown by 10% over five school years.

Grades Offered

Grades 9-12

View Data

Distribution of Students By Grade Trends
Grade	Grayslake Central High School
9	323
10	359
11	350
12	343

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School Data: Full School Dataset XML | Full School Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

Total Students

1,375 students

View Data

Total Students Trends Over Years (1987-2023)
Year	Grayslake Central High School
2023	1,419
2022	1,378
2021	1,379
2020	1,335
2019	1,335
2018	1,415
2017	1,415
2016	1,438
2015	1,461
2014	1,430
2013	1,405
2012	1,372
2011	1,334
2010	1,296
2009	1,284
2008	1,298
2007	1,546
2006	1,749
2005	1,624
2004	2,057
2003	1,940
2002	1,783
2001	1,661
2000	1,572
1999	1,443
1998	1,403
1997	1,279
1996	1,177
1995	1,044
1994	923
1993	841
1992	811
1991	757
1990	748
1989	732
1988	809
1987	827

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School Data: Full School Dataset XML | Full School Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

Gender %

Total Classroom Teachers

104 teachers

View Data

Total Classroom Teachers Trends Over Years (1990-2023)
Year	Grayslake Central High School
2023	103
2022	100
2020	94
2019	94
2018	94
2017	94
2016	91
2015	93
2014	86
2013	149
2012	96
2011	93
2010	94
2009	91
2008	77
2007	90
2006	106
2005	106
2004	124
2003	103
2002	94
2001	95
2000	97
1999	89
1998	80
1997	78
1996	71
1995	62
1994	59
1993	55
1992	50
1991	48
1990	45

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School Data: Full School Dataset XML | Full School Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

Year Founded

1946

Colors

White, Green

School Rankings

Grayslake Central High School ranks within the top 20% of all 3,426 schools in Illinois (based off of combined math and reading proficiency testing data).

The of Grayslake Central High School is 0.61, which is less than the diversity score at state average of 0.70. The school's diversity has stayed relatively flat over five school years.

This School

State Level (IL)

#448 out of 3426 schools
(Top 20%)

View Data

Overall School Rank Trends Over Years (2011-2022)
Year	Grayslake Central High School
2022	#448
2021	#599
2019	#530
2018	#613
2017	#388
2016	#1998
2015	#1959
2014	#778
2013	#831
2012	#2723
2011	#2838

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School Data: Full School Dataset XML | Full School Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

(20-21)

43%

28%

View Data

Math Proficiency Comparison Over Years (2010-2021)
Year	Grayslake Central High School	Illinois	Grayslake CHSD 127 School District
2021	43%	28%	40%
2019	49%	33%	47%
2018	47%	32%	47%
2017	53%	32%	51%
2016	11%	31%	19%
2015	7%	29%	14%
2014	69%	59%	69%
2013	69%	58%	68%
2012	67%	80%	68%
2011	68%	80%	66%
2010	59%	80%	61%

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School Data: Full School Dataset XML | Full School Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

47%

30%

View Data

Reading and Language Arts Proficiency Comparison Over Years (2011-2022)
Year	Grayslake Central High School	Illinois	Grayslake CHSD 127 School District
2022	47%	30%	45%
2021	46%	32%	44%
2019	57%	38%	53%
2018	55%	37%	47%
2017	61%	38%	54%
2016	48%	36%	45%
2015	55%	38%	52%
2014	73%	57%	69%
2013	72%	58%	69%
2012	69%	75%	65%
2011	66%	75%	63%

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School Data: Full School Dataset XML | Full School Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

67%

50%

Student : Teacher Ratio

13:1

View Data

Student-Teacher Ratio Comparison Over Years (1990-2023)
Year	Grayslake Central High School	Illinois	Grayslake CHSD 127 School District
2023	14:1	14:1	14:1
2022	14:1	14:1	13:1
2020	14:1	15:1	14:1
2019	14:1	15:1	14:1
2018	15:1	16:1	15:1
2017	15:1	15:1	15:1
2016	16:1	16:1	16:1
2015	16:1	16:1	16:1
2014	17:1	16:1	16:1
2013	9:1	13:1	10:1
2012	14:1	16:1	14:1
2011	14:1	16:1	15:1
2010	14:1	16:1	14:1
2009	14:1	16:1	15:1
2008	17:1	18:1	18:1
2007	17:1	17:1	17:1
2006	17:1	16:1	16:1
2005	15:1	16:1	16:1
2004	17:1	17:1	17:1
2003	19:1	16:1	19:1
2002	19:1	16:1	19:1
2001	17:1	16:1	17:1
2000	16:1	16:1	16:1
1999	16:1	16:1	16:1
1998	18:1	17:1	18:1
1997	16:1	17:1	16:1
1996	17:1	17:1	17:1
1995	17:1	17:1	17:1
1994	16:1	18:1	16:1
1993	15:1	18:1	15:1
1992	16:1	17:1	16:1
1991	16:1	17:1	16:1
1990	17:1	18:1	17:1

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School Data: Full School Dataset XML | Full School Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

American Indian

n/a

Asian

View Data

Asian Student Percentage Comparison Over Years (1991-2023)
Year	Grayslake Central High School	Illinois	Grayslake CHSD 127 School District
2023	8%	6%	7%
2022	8%	5%	7%
2021	9%	5%	7%
2020	11%	5%	8%
2019	11%	5%	8%
2018	10%	5%	7%
2017	10%	5%	7%
2016	9%	5%	7%
2015	9%	6%	7%
2014	9%	5%	8%
2013	10%	5%	8%
2012	9%	4%	6%
2011	10%	5%	8%
2010	10%	5%	8%
2009	9%	5%	7%
2008	10%	5%	8%
2007	9%	5%	8%
2006	7%	5%	7%
2005	6%	5%	6%
2004	5%	4%	5%
2003	4%	4%	4%
2002	5%	4%	5%
2001	4%	4%	4%
2000	4%	3%	4%
1999	3%	3%	3%
1998	3%	3%	3%
1997	2%	3%	2%
1996	2%	3%	2%
1995	2%	3%	2%
1994	1%	3%	1%
1993	2%	3%	2%
1992	1%	3%	1%
1991	1%	3%	1%

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School Data: Full School Dataset XML | Full School Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

Hispanic

22%

28%

View Data

Hispanic Student Percentage Comparison Over Years (1991-2023)
Year	Grayslake Central High School	Illinois	Grayslake CHSD 127 School District
2023	23%	27%	27%
2022	23%	27%	27%
2021	23%	27%	26%
2020	22%	26%	24%
2019	22%	26%	24%
2018	20%	26%	22%
2017	20%	26%	22%
2016	19%	26%	21%
2015	19%	25%	21%
2014	18%	25%	19%
2013	19%	24%	19%
2012	19%	24%	20%
2011	18%	23%	19%
2010	14%	22%	16%
2009	13%	22%	15%
2008	11%	21%	5%
2007	13%	20%	15%
2006	12%	19%	13%
2005	11%	18%	12%
2004	10%	18%	10%
2003	9%	17%	9%
2002	7%	16%	7%
2001	7%	15%	7%
2000	7%	15%	7%
1999	8%	14%	8%
1998	8%	13%	8%
1997	7%	13%	7%
1996	7%	12%	7%
1995	4%	12%	4%
1994	4%	11%	4%
1993	4%	11%	4%
1992	4%	10%	4%
1991	4%	10%	4%

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School Data: Full School Dataset XML | Full School Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

Black

16%

View Data

Black Student Percentage Comparison Over Years (1992-2023)
Year	Grayslake Central High School	Illinois	Grayslake CHSD 127 School District
2023	6%	17%	6%
2022	6%	17%	6%
2021	5%	17%	5%
2020	4%	17%	4%
2019	4%	17%	4%
2018	4%	17%	3%
2017	4%	17%	3%
2016	4%	17%	3%
2015	3%	17%	2%
2014	4%	17%	3%
2013	4%	18%	3%
2012	5%	18%	4%
2011	4%	18%	3%
2010	6%	20%	5%
2009	6%	20%	5%
2008	4%	20%	5%
2007	3%	20%	3%
2006	3%	20%	3%
2005	3%	20%	3%
2004	3%	21%	3%
2003	3%	21%	3%
2002	2%	21%	2%
2001	2%	21%	2%
2000	2%	21%	2%
1999	2%	21%	2%
1998	2%	21%	2%
1997	2%	20%	2%
1996	2%	21%	2%
1995	1%	20%	1%
1994	1%	21%	1%
1992	1%	21%	1%

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School Data: Full School Dataset XML | Full School Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

White

58%

45%

View Data

White Student Percentage Comparison Over Years (1991-2023)
Year	Grayslake Central High School	Illinois	Grayslake CHSD 127 School District
2023	58%	45%	55%
2022	58%	47%	56%
2021	59%	47%	58%
2020	59%	48%	60%
2019	59%	48%	60%
2018	63%	49%	65%
2017	63%	49%	65%
2016	65%	49%	67%
2015	65%	49%	67%
2014	65%	50%	67%
2013	63%	50%	67%
2012	63%	51%	66%
2011	63%	51%	66%
2010	70%	53%	70%
2009	72%	53%	71%
2008	75%	54%	74%
2007	75%	55%	74%
2006	78%	56%	77%
2005	80%	57%	79%
2004	82%	57%	82%
2003	84%	58%	84%
2002	86%	59%	86%
2001	87%	60%	87%
2000	87%	61%	87%
1999	87%	62%	87%
1998	87%	63%	87%
1997	89%	64%	89%
1996	89%	64%	89%
1995	92%	65%	92%
1994	94%	65%	94%
1993	94%	65%	94%
1992	94%	66%	94%
1991	94%	66%	94%

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School Data: Full School Dataset XML | Full School Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

Hawaiian

n/a

Two or more races

View Data

Two or More Races Student Percentage Comparison Over Years (2013-2023)
Year	Grayslake Central High School	Illinois	Grayslake CHSD 127 School District
2023	5%	4%	5%
2022	5%	4%	4%
2021	4%	4%	4%
2020	4%	4%	4%
2019	4%	4%	4%
2018	3%	3%	3%
2017	3%	3%	3%
2016	3%	3%	2%
2015	4%	3%	3%
2014	4%	3%	3%
2013	4%	3%	3%

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School Data: Full School Dataset XML | Full School Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

All Ethnic Groups

0.61

0.70

View Data

Diversity Score Comparison Over Years (1991-2023)
Year	Grayslake Central High School	Illinois	Grayslake CHSD 127 School District
2023	0.60	0.70	0.62
2022	0.60	0.68	0.61
2021	0.59	0.68	0.60
2020	0.59	0.68	0.58
2019	0.59	0.68	0.58
2018	0.56	0.67	0.53
2017	0.56	0.67	0.53
2016	0.54	0.67	0.51
2015	0.54	0.67	0.51
2014	0.54	0.66	0.51
2013	0.56	0.66	0.52
2012	0.56	0.65	0.53
2011	0.57	0.66	0.52
2010	0.50	0.64	0.48
2009	0.46	0.64	0.47
2008	0.42	0.64	0.44
2007	0.42	0.63	0.42
2006	0.38	0.61	0.38
2005	0.35	0.61	0.36
2004	0.32	0.60	0.32
2003	0.29	0.59	0.29
2002	0.26	0.59	0.26
2001	0.24	0.58	0.24
2000	0.24	0.57	0.24
1999	0.24	0.56	0.24
1998	0.23	0.56	0.24
1997	0.20	0.54	0.20
1996	0.20	0.53	0.20
1995	0.15	0.53	0.15
1994	0.12	0.52	0.12
1993	0.12	0.52	0.12
1992	0.12	0.52	0.12
1991	0.12	0.52	0.12

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School Data: Full School Dataset XML | Full School Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

91%

87%

View Data

Graduation Rate Comparison Over Years (2011-2022)
Year	Grayslake Central High School	Illinois	Grayslake CHSD 127 School District
2022	91%	87%	91%
2018	97%	87%	97%
2017	96%	87%	95%
2016	95%	85%	95%
2015	96%	85%	95%
2014	95%	86%	94%
2013	96%	83%	96%
2012	93%	82%	92%
2011	89%	83%	88%

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School Data: Full School Dataset XML | Full School Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

Eligible for

11%

43%

View Data

Free Lunch Eligibility Comparison Over Years (2013-2023)
Year	Grayslake Central High School	Illinois	Grayslake CHSD 127 School District
2023	11%	43%	12%
2022	11%	43%	12%
2021	11%	44%	11%
2020	11%	47%	12%
2019	11%	47%	12%
2018	10%	46%	11%
2017	10%	46%	11%
2016	11%	47%	11%
2015	11%	52%	11%
2014	13%	47%	12%
2013	12%	45%	11%

Download Table: Download as CSV | Download as XML | Download as JSON

Download Full School Data: Full School Dataset XML | Full School Dataset JSON

Note: Data may not be displayed on any public-facing website or service that replicates or resembles a school search or review portal without prior written permission. See our Terms of Service.

Eligible for (11-12)

27%

School Statewide Testing

View Education Department Test Scores

School District Name

Grayslake CHSD 127 School District

Source: National Center for Education Statistics (NCES), IL Dept. of Education

School Notes

School Mascot: Aries The Ram

Profile last updated: 02/09/2025

Frequently Asked Questions

What is Grayslake Central High School's ranking?

Grayslake Central High School is ranked #448 out of 3,426 schools, which ranks it among the top 20% of public schools in Illinois.

What schools are Grayslake Central High School often compared to?

Grayslake Central High Schoolis often viewed alongside schools like Grayslake North High School, Warren Township High School by visitors of our site.

What percent of students have achieved state testing proficiency in math and reading?

43% of students have achieved math proficiency (compared to the 28% IL state average), while 47% of students have achieved reading proficiency (compared to the 30% IL state average).

What is the graduation rate of Grayslake Central High School?

The graduation rate of Grayslake Central High School is 91%, which is higher than the Illinois state average of 87%.

How many students attend Grayslake Central High School?

1,375 students attend Grayslake Central High School.

What is the racial composition of the student body?

58% of Grayslake Central High School students are White, 22% of students are Hispanic, 9% of students are Asian, 6% of students are Black, and 5% of students are Two or more races.

What is the student:teacher ratio of Grayslake Central High School?

Grayslake Central High School has a student ration of 13:1, which is equal to the Illinois state average of 13:1.

What grades does Grayslake Central High School offer ?

Grayslake Central High School offers enrollment in grades 9-12

What school district is Grayslake Central High School part of?

Grayslake Central High School is part of Grayslake CHSD 127 School District.

School Calendar

View the Grayslake Central High School yearly calendar below. Note key dates such as:

Event

Date

First Day of Fall Sports

August 11, 2025 (Monday)

First Day of Student Attendance

August 13, 2025 (Wednesday)

First Day for Boys Bowling, Cheerleading, & Dance

October 27, 2025 (Monday)

First Day of Girls Basketball

November 03, 2025 (Monday)

First Day of Boys Basketball, Boys Wrestling, & Girls Wrestling

November 10, 2025 (Monday)

School Reviews

Review Grayslake Central High School. Reviews should be a few sentences in length. Please include any comments on:

Quality of academic programs, teachers, and facilities
Availability of music, art, sports and other extracurricular activities

Recent Articles

June 03, 2025

Texas Schools: The Voucher/School Choice Debate

The issue of school choice and a voucher system is currently being revisited in Houston and across the state of Texas, with strong opinions on both sides of the debate.

June 03, 2025

Fuel Up to Play 60 Focuses on Integrating Fitness and Wellness into the School Day

What if NFL players came to your school? With the Fuel Up to Play 60 program, sponsored by the National Dairy Council and the NFL, nutrition and exercise are promoted during the school day. NFL players participate in the program by coming to schools and talking to students about fitness. Learn more about the program and some of the schools that are implementing it.

May 27, 2025

What Parents Need to Know About Lunch Shaming

Students all over the nation go hungry every day not because their schools don’t offer lunch, but because they refuse them to children with outstanding debts. Read on to learn about the horror that is lunch shaming and what can be done about it.

Quick Stats (2025)

Grades: 9-12
Enrollment: 1,375 students
Student:Teacher Ratio: 13:1
Minority Enrollment: 42%
: 91% (Top 50%)
: Top 20%
: 43% (Top 20%)
: 47% (Top 20%)
: 67% (Top 20%)
Source: National Center for Education Statistics (NCES), IL Dept. of Education