- Enrollment
- 3,446
- Students per teacher
- 24.6:1
- Resource Index
- 28/100
High school (grades 9-12) · Ontario, CA
Colony High
Federal NCES profile for Colony High, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 22/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 060816010606
👥 S:T ratio 3
🌟 Gifted program 70
🎓 Counselors 16
📋 Attendance 0
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Colony High earns 22/100 on the Resource Investment Index, with class sizes larger than 73% of California schools. It is also one of the largest schools in California.
- #6 of 6
- high schools in Ontario · Resource Index
- 22
- Resource Index · Lower
- 24.2:1
- large classes for California
- 54.1%
- free-lunch eligible
Colony High has class sizes larger than 73% of California schools. Computed live against every California school reporting to NCES.
By Resource Investment Index, Colony High ranks #6 of 6 high schools in Ontario, CA.
School address
District: Chaffey Joint Union High · California
NCES ID 060816010606 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
-37 students YoY
Colony High held near 2,085 students from 2022-23 to 2023-24 (-37 headcount).
Teacher FTE lost 87.9 → 87.3 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Steady CCD campus
-37 students YoY 060816010606 · Ontario, CA High · LARGE · TRAD
2,109 enr · 24.2:1 · 54.1% lunch · RII 22
Nearest enrollment peer: Etiwanda High (3,446 students)
Colony High held near 2,085 students from 2022-23 to 2023-24 (-37 headcount). Teacher FTE lost 87.9 → 87.3 across the same CCD years. Read with this school → · District book → · California schools → · Find another →
Colony High in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- Etiwanda High
Etiwanda High
3,446 students
- Rancho Cucamon
Rancho Cucamonga High
3,221 students
- Chaffey High
Chaffey High
3,127 students
- Los Osos High
Los Osos High
2,759 students
- Montclair High
Montclair High
2,515 students
- This school
Colony High
2,109 students
What this shows Colony High reports 2,109 students on the CCD universe file.
How Colony High compares
Colony High held steady on CCD headcount: ratios and free-lunch share vs California and U.S. means.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 24.2:1 | ▲ 13% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 54.1% | ▼ 3% | 55.5% | 51.7% |
| Enrollment | 2,109 | top 3% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
24.2:1
Leaner classes than 6% of US schools, heavier class loads than most.
2,109
Bigger than 98% of US schools by enrollment, a large campus nationally.
Equity indicators methodology
Economic need
54.1%
free-lunch eligible
- 3% below the California average of 55.5%
Above the 40% Title I schoolwide threshold; federal funds support the whole school, not individual students.
Staffing depth
24.2:1
students per teacher
- 13% above state mean
Top 73% in California - lower ratio than 27% of state schools
Well above 20:1, one of the more stretched staffing loads nationally relative to enrollment.
Engagement
46.1%
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
$16,706
per pupil, district-wide
- below California avg of $18,665
Somewhat below the U.S. average per-pupil spend; funding constraints may affect programs, facilities, and staffing.
Support staff
Counselors5.0 FTE
Per 422 students, the combined health-and-guidance staffing load for this school.
Discipline context
2
in-school suspensions + 146 out-of-school
Suspension rate: 0.1 per 100 students. Combined in-school and out-of-school rate: 7.0 per 100 students. Reported via the Civil Rights Data Collection. Includes 6 expulsions.
Student demographics
Hispanic or Latino 66.4%
African American 12.8%
Asian 9.0%
White 7.3%
Two or More 3.1%
Native Hawaiian / Pacific Islander 1.0%
American Indian / Alaska Native 0.3%
Largest group: Hispanic or Latino at 66.4% of enrollment.
Student-body diversity index 52.8/100
Simpson diversity index - at 52.8, Colony High is more mixed than the California school average of 46.0.
Programs
AP courses offered 13
Gifted & talented Yes
District finance for Chaffey Joint Union High reports $16,706 per pupil (NCES F-33) - open the district page for the full revenue mix.
How Colony High Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Etiwanda High | Larger | Lower economic need | Similar S:T ratio |
| Rancho Cucamonga High | Larger | Lower economic need | Similar S:T ratio |
| Chaffey High | Larger | Higher economic need | Similar S:T ratio |
| Los Osos High | Larger | Lower economic need | Similar S:T ratio |
| Montclair High | Similar size | Higher economic need | Lower S:T ratio |
Comparisons are relative to Colony High's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 3,221
- Students per teacher
- 24.4:1
- Resource Index
- 31/100
- Enrollment
- 3,127
- Students per teacher
- 22.8:1
- Resource Index
- 30/100
- Enrollment
- 2,759
- Students per teacher
- 24.2:1
- Resource Index
- 28/100
- Enrollment
- 2,515
- Students per teacher
- 22.5:1
- Resource Index
- 36/100
Similar high schools in Ontario
5 comparable high schools (grades 9-12) serving the same city.
Chaffey High
Standard public school
3,127 students 22.8:1 students per teacher
Ontario High
Standard public school
1,994 students 20.8:1 students per teacher
Valley View High (Continuation)
Alternative education program
370 students 14.8:1 students per teacher
Chaffey District Online High
Alternative education program
93 students 18.6:1 students per teacher
Chaffey Community Day
Alternative education program
20 students 10:1 students per teacher
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 (~2,109 students)
Frequently asked questions about Colony High
How many students attend Colony High?
Colony High has 2,109 students enrolled. It is a high school in Ontario, CA. CCD year-over-year: 2,122 (2022-23) → 2,085 (2023-24), nearly flat (-37).
What is the student-teacher ratio at Colony High?
The student-teacher ratio at Colony High is 24.2:1, which is 13% higher than the California average of 21.5:1 and 54% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Colony High?
54.1% of students at Colony High are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Colony High?
The largest demographic group at Colony High is Hispanic or Latino at 66.4% of enrollment, in Ontario, CA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 52.8/100.
What is the Resource Investment Index for Colony High?
Colony High has a Resource Investment Index of 22/100 (lower 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 Colony High rank among high schools in Ontario?
By Resource Investment Index, Colony High ranks #6 of 6 high schools in Ontario, CA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all high schools in Ontario on the city page.
What other schools are in Chaffey Joint Union High?
Besides Colony High, Chaffey Joint Union High also operates Etiwanda High (3,446 students), Rancho Cucamonga High (3,221 students), and Chaffey High (3,127 students). See the Chaffey Joint Union High district page for the complete list.