- Enrollment
- 1,348
- Students per teacher
- 16.2:1
- Resource Index
- 41/100
High school (grades 9-12) · Crystal Lake, IL
Crystal Lake Central High School
Federal NCES profile for Crystal Lake Central High School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 34/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 171137001367
👥 S:T ratio 34
🌟 Gifted program 30
🎓 Counselors 42
📋 Attendance 30
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Crystal Lake Central High School earns 34/100 on the Resource Investment Index, with class sizes larger than 84% of Illinois schools. It is also one of the largest schools in Illinois.
- #3 of 3
- high schools in Crystal Lake · Resource Index
- 34
- Resource Index · Typical
- 16.6:1
- large classes for Illinois
- 1,443
- students enrolled
Crystal Lake Central High School has class sizes larger than 84% of Illinois schools. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Crystal Lake Central High School ranks #3 of 3 high schools in Crystal Lake, IL.
School address
NCES ID 171137001367 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
+28 students YoY
Crystal Lake Central High School held near 1,498 students from 2022-23 to 2023-24 (+28 headcount).
Teacher FTE lost 87.2 → 83.7 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Steady CCD campus
+28 students YoY 171137001367 · Crystal Lake, IL High · MID · TRAD
1,443 enr · 16.6:1 · RII 34
Nearest enrollment peer: Cary-Grove Community High School (1,348 students)
Crystal Lake Central High School held near 1,498 students from 2022-23 to 2023-24 (+28 headcount). Teacher FTE lost 87.2 → 83.7 across the same CCD years. Read with this school → · District book → · Illinois schools → · Find another →
Crystal Lake Central High School in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- This school
Crystal Lake Central High School
1,443 students
- Cary-Grove Com
Cary-Grove Community High School
1,348 students
- Crystal Lake S
Crystal Lake South High School
1,279 students
- Prairie Ridge
Prairie Ridge High School
1,133 students
What this shows Crystal Lake Central High School reports 1,443 students on the CCD universe file.
How Crystal Lake Central High School compares
Crystal Lake Central High School held steady on CCD headcount: ratios and free-lunch share vs Illinois and U.S. means.
| Metric | This school | vs Illinois | Illinois avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 16.6:1 | ▲ 19% | 14:1 | 15.7:1 |
| Enrollment | 1,443 | top 4% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
16.6:1
Leaner classes than 33% of US schools, heavier class loads than most.
1,443
Bigger than 96% of US schools by enrollment, a large campus nationally.
Equity indicators methodology
Staffing depth
16.6:1
students per teacher
- 19% above state mean
Top 84% in Illinois - lower ratio than 16% of state schools
Between 16:1 and 20:1, squarely in the typical U.S. public-school staffing range.
Engagement
28.1%
chronically absent (missed 10%+ of school days)
At or above 20%, the commonly used threshold for "high" chronic absenteeism, signaling significant barriers to regular attendance.
Funding equity
$23,700
per pupil, district-wide
- above Illinois avg of $18,196
Well above the U.S. public-school average, reflecting substantially higher local or state investment per enrolled student.
Support staff
Counselors5.0 FTE
Per 289 students, the combined health-and-guidance staffing load for this school.
Discipline context
107
in-school suspensions + 80 out-of-school
Suspension rate: 7.4 per 100 students. Combined in-school and out-of-school rate: 13.0 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
White 64.2%
Hispanic or Latino 27.9%
Asian 2.9%
Two or More 2.7%
African American 1.9%
American Indian / Alaska Native 0.2%
Native Hawaiian / Pacific Islander 0.1%
Largest group: White at 64.2% of enrollment.
Student-body diversity index 50.8/100
Simpson diversity index - at 50.8, Crystal Lake Central High School is more mixed than the Illinois school average of 38.9.
Programs
AP courses offered 20
District finance for Chsd 155 reports $23,700 per pupil (NCES F-33) - open the district page for the full revenue mix.
How Crystal Lake Central High School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Cary-Grove Community High School | Similar size | No free-lunch data | Similar S:T ratio |
| Crystal Lake South High School | Similar size | No free-lunch data | Similar S:T ratio |
| Prairie Ridge High School | Similar size | No free-lunch data | Similar S:T ratio |
Comparisons are relative to Crystal Lake Central High School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,279
- Students per teacher
- 17.5:1
- Resource Index
- 39/100
- Enrollment
- 1,133
- Students per teacher
- 16:1
- Resource Index
- 42/100
Similar high schools in Crystal Lake
2 comparable high schools (grades 9-12) serving the same city.
Nationwide high schools with similar size or staffing
Out-of-state peers matched by enrollment and by student-teacher ratio, not the same-city or same-district lists above.
Similar enrollment (~1,443 students)
Similar student-teacher ratio (~16.6:1)
Frequently asked questions about Crystal Lake Central High School
How many students attend Crystal Lake Central High School?
Crystal Lake Central High School has 1,443 students enrolled. It is a high school in Crystal Lake, IL. CCD year-over-year: 1,470 (2022-23) → 1,498 (2023-24), nearly flat (+28).
What is the student-teacher ratio at Crystal Lake Central High School?
The student-teacher ratio at Crystal Lake Central High School is 16.6:1, which is 19% higher than the Illinois average of 14:1 and 6% higher than the national average of 15.7:1.
What is the racial and ethnic makeup of Crystal Lake Central High School?
The largest demographic group at Crystal Lake Central High School is White at 64.2% of enrollment, in Crystal Lake, IL. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 50.8/100.
What is the Resource Investment Index for Crystal Lake Central High School?
Crystal Lake Central High School has a Resource Investment Index of 34/100 (typical reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, gifted-program reporting, counselor availability, chronic absenteeism. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Crystal Lake Central High School rank among high schools in Crystal Lake?
By Resource Investment Index, Crystal Lake Central High School ranks #3 of 3 high schools in Crystal Lake, IL. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all high schools in Crystal Lake on the city page.
What other schools are in Chsd 155?
Besides Crystal Lake Central High School, Chsd 155 also operates Cary-Grove Community High School (1,348 students), Crystal Lake South High School (1,279 students), and Prairie Ridge High School (1,133 students). See the Chsd 155 district page for the complete list.