Grayslake Central High School in Grayslake, IL

At a glance

Reported students

1,375

NCES CCD 2024–25

Teachers (FTE)

106.3

NCES CCD 2024–25

Student–teacher ratio

12.9:1

Calculated; not a class-size measure

Grades served

09–12

NCES preliminary directory 2025–26

Illinois high enrollment

83rd percentile

Compared with 965 same-level schools reporting enrollment.

District median enrollment

1,291.5

Grayslake Central High School: 1,375 reported students.

State peer staffing position

54th percentile

12.9:1 reported; state peer median 12.6:1. Ratio is not class size.

Historical enrollment and staffing · CRDC 2021–22

These older figures are kept separate from 2024–25 statistics and benchmarks. Differences between years can reflect changes in enrollment, staffing, or reporting scope.

Students: 1,378
Teachers (FTE): 105
Student–teacher ratio: 13.1:1

What the reported data says about Grayslake Central High School

Grayslake Central High School is a public high school serving grades 09–12 in Grayslake. It is one of 2 current school records connected to Grayslake CHSD 127. NCES reports 1,375 students for 2024–25.

Among 965 high schools in Illinois with comparable records, this school is larger than the reported median of 254 students. Its enrollment is at approximately the 83rd percentile for that peer group. Size describes the campus, not instructional quality.

The reported student–teacher ratio is 12.9:1, close to the Illinois median of 12.6:1 for the same school level. This ratio uses total enrollment and teacher FTE; it is not an average classroom headcount and can be affected by special programs or part-time staffing.

The largest reported race and ethnicity groups are White (57.5%) and Hispanic or Latino (22.3%). English learners represent 4% of enrollment. Students served under IDEA represent 16.4%. These figures help families understand who the school serves; they are not rating inputs.

The 2021–22 civil-rights collection reports AP student enrollment, gifted and talented programming, computer science. The school reported 23 AP courses. Program availability changes, so families should confirm the current catalog and participation rules directly with the school.

Questions worth asking Grayslake Central High School

1How do the reported 12.9:1 student–teacher ratio and 106.3 teacher FTE translate into actual class sizes by grade?
2Have the reported academic programs changed since the 2021–22 CRDC collection?
3What counseling support is available today? The school reported 5.5 counselor FTE in 2021–22.
4What meal assistance, transportation, after-school, and family-support services are currently available?

Bring the full school visit checklist →

Enrollment needs

English learners: 4%
Students with disabilities: 16.4%
Lunch program: No

Reported support staff

Counselors (FTE): 5.5
Nurses (FTE): 1
Psychologists (FTE): 2
Social workers (FTE): 3

CRDC 2021–22 full-time-equivalent counts; verify current assignments with the school.

Student demographics

Race and ethnicity share of reported enrollment

White57.5%
Hispanic22.3%
Black6.5%
Asian7.9%
American Indian / Alaska Native0.1%
Native Hawaiian / Pacific Islander0%
Multiracial5.2%

Race/ethnicity: NCES CCD 2024–25. English learner and disability context: CRDC 2021–22. Lunch eligibility: NCES CCD 2024–25. Privacy rules can produce missing values.

Programs reported by the school

AP student enrollment

Students enrolled

23 distinct courses reported

Gifted and talented

Offered

Computer science

Offered

CRDC 2021–22: the AP flag records student enrollment; gifted and computer-science fields describe reported programs/classes. Confirm current courses and eligibility with the school.

Start with campuses at the same school level or with similar reported enrollment.

Grayslake North High School

High · Grades 09–12

1,208 reported students

View all 2 district schools →

Public schools near Grayslake Central High School

Closest campuses by straight-line distance between NCES geocodes, favoring the same school level. Distance is not drive time or an attendance assignment.

School	Grades	Students	Distance
Lake Co High Schools Tech Campus High · Lake ROE	09–12	0	1.6 mi
Grayslake North High School High · Grayslake CHSD 127	09–12	1,208	1.9 mi
Round Lake Senior High School High · Round Lake CUSD 116	09–12	2,194	2.7 mi
Round Lake Transition Center High · Round Lake CUSD 116	12–12	0	2.8 mi
Round Lake ALOP High · Lake ROE	06–12	0	2.8 mi
Lake Co Collaborative Alop High · Lake ROE	07–12	0	3 mi

Compare all 9 public schools in Grayslake, IL →

Frequently asked questions about Grayslake Central High School

What grades does Grayslake Central High School serve?

Grayslake Central High School reports grades 09–12 in the NCES 2025–26 preliminary directory. It is classified as a high school in Grayslake CHSD 127.

How many students attend Grayslake Central High School?

Grayslake Central High School reported 1,375 students in the NCES 2024–25 membership file. That places it near the 83rd percentile among 965 Illinois high schools reporting enrollment. The 2021–22 civil-rights collection recorded 1,378 students.

What is the student–teacher ratio at Grayslake Central High School?

The calculated ratio is 12.9:1, based on 1,375 students and 106.3 full-time-equivalent classroom teachers in 2024–25. The Illinois median for the same school level is 12.6:1. A ratio is not the same as average class size.

Is Grayslake Central High School a public, charter, or magnet school?

Grayslake Central High School is a public school and is not a charter school. Enrollment is generally based on Grayslake CHSD 127 attendance boundaries and transfer rules.

Which school district is Grayslake Central High School in?

Grayslake Central High School is part of Grayslake CHSD 127, based in Grayslake, IL, which operates 2 current schools. Confirm attendance zones and enrollment rules with the district.

What public schools are near Grayslake Central High School?

The closest public schools by straight-line distance include Lake Co High Schools Tech Campus (1.6 mi), Grayslake North High School (1.9 mi), Round Lake Senior High School (2.7 mi). Distance does not determine eligibility; attendance boundaries and program rules do.