- Enrollment
- 3,446
- Students per teacher
- 24.6:1
- Resource Index
- 28/100
High school (grades 9-12) · Ontario, CA
Chaffey High
Federal NCES profile for Chaffey High, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 30/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 060816000791
👥 S:T ratio 9
🌟 Gifted program 70
🎓 Counselors 11
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Chaffey High earns 30/100 on the Resource Investment Index, with class sizes near the California median. It is also one of the largest schools in California.
- #4 of 6
- high schools in Ontario · Resource Index
- 30
- Resource Index · Lower
- 22.8:1
- students per teacher
- 71.6%
- free-lunch eligible
Chaffey High has class sizes near the California median. Computed live against every California school reporting to NCES.
By Resource Investment Index, Chaffey High ranks #4 of 6 high schools in Ontario, CA.
School address
District: Chaffey Joint Union High · California
NCES ID 060816000791 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
-123 students YoY
Chaffey High held near 3,223 students from 2022-23 to 2023-24 (-123 headcount).
Teacher FTE lost 137.8 → 135.3 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Steady CCD campus
-123 students YoY 060816000791 · Ontario, CA High · LARGE · TRAD
3,127 enr · 22.8:1 · 71.6% lunch · RII 30
Nearest enrollment peer: Etiwanda High (3,446 students)
Chaffey High held near 3,223 students from 2022-23 to 2023-24 (-123 headcount). Teacher FTE lost 137.8 → 135.3 across the same CCD years. Read with this school → · District book → · California schools → · Find another →
Chaffey 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
- This school
Chaffey High
3,127 students
- Los Osos High
Los Osos High
2,759 students
- Montclair High
Montclair High
2,515 students
- Alta Loma High
Alta Loma High
2,386 students
What this shows Chaffey High reports 3,127 students on the CCD universe file.
How Chaffey High compares
Chaffey 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 | 22.8:1 | ▲ 6% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 71.6% | ▲ 29% | 55.5% | 51.7% |
| Enrollment | 3,127 | top 1% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
22.8:1
Leaner classes than 9% of US schools, heavier class loads than most.
3,127
Bigger than 99% of US schools by enrollment, a large campus nationally.
Equity indicators methodology
Economic need
71.6%
free-lunch eligible
- 29% above the California average of 55.5%
Above the 40% Title I schoolwide threshold; federal funds support the whole school, not individual students.
Staffing depth
22.8:1
students per teacher
- 6% above state mean
Top 61% in California - lower ratio than 39% of state schools
Above 20:1, running heavier than the typical U.S. public school; staffing is comparatively stretched.
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
Counselors7.0 FTE
Per 447 students, the combined health-and-guidance staffing load for this school.
Discipline context
0
in-school suspensions + 298 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 9.5 per 100 students. Reported via the Civil Rights Data Collection. Includes 13 expulsions.
Student demographics
Hispanic or Latino 88.9%
African American 3.2%
White 2.8%
Asian 2.6%
Two or More 1.8%
American Indian / Alaska Native 0.6%
Native Hawaiian / Pacific Islander 0.3%
Largest group: Hispanic or Latino at 88.9% of enrollment.
Student-body diversity index 20.7/100
Simpson diversity index - at 20.7, Chaffey High is less mixed than the California school average of 46.0.
Programs
AP courses offered 14
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 Chaffey High Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Etiwanda High | Similar size | Lower economic need | Higher S:T ratio |
| Rancho Cucamonga High | Similar size | Lower economic need | Higher S:T ratio |
| Los Osos High | Similar size | Lower economic need | Similar S:T ratio |
| Montclair High | Similar size | Similar economic need | Similar S:T ratio |
| Alta Loma High | Similar size | Lower economic need | Higher S:T ratio |
Comparisons are relative to Chaffey 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
- 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
- Enrollment
- 2,386
- Students per teacher
- 24.6:1
- Resource Index
- 23/100
Similar high schools in Ontario
5 comparable high schools (grades 9-12) serving the same city.
Colony High
Standard public school
2,109 students 24.2:1 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 (~3,127 students)
Frequently asked questions about Chaffey High
How many students attend Chaffey High?
Chaffey High has 3,127 students enrolled. It is a high school in Ontario, CA. CCD year-over-year: 3,346 (2022-23) → 3,223 (2023-24), nearly flat (-123).
What is the student-teacher ratio at Chaffey High?
The student-teacher ratio at Chaffey High is 22.8:1, which is 6% higher than the California average of 21.5:1 and 45% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Chaffey High?
71.6% of students at Chaffey High are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Chaffey High?
The largest demographic group at Chaffey High is Hispanic or Latino at 88.9% of enrollment, in Ontario, CA.
What is the Resource Investment Index for Chaffey High?
Chaffey High has a Resource Investment Index of 30/100 (lower reported resources relative to schools nationally) based on 3 factors: student-teacher ratio, gifted-program reporting, counselor availability. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Chaffey High rank among high schools in Ontario?
By Resource Investment Index, Chaffey High ranks #4 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 Chaffey High, Chaffey Joint Union High also operates Etiwanda High (3,446 students), Rancho Cucamonga High (3,221 students), and Los Osos High (2,759 students). See the Chaffey Joint Union High district page for the complete list.