Enrollment
3,127
California · 2024-25 NCES data
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 40/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 060816000791
👥 S:T ratio 9
📚 AP courses 70
🌟 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 40/100 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
- 40
- Resource Index · Typical
- 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 →
Teachers (FTE)
137.0
Federal CCD staff survey
Students per teacher
22.8:1
vs 21.5:1 California avg
+6% vs state
Free-lunch eligible
71.6%
vs 55.5% California avg
+29% vs state
Student-teacher ratio in context
How Chaffey High compares with California and U.S. medians
What stands out at Chaffey High
Chaffey High is a higher-need, large high school in Ontario, California, enrolling 3,127 students.
Class loads run somewhat heavier than typical: 22.8:1 puts it in the larger third of California schools by student-teacher ratio.
Economic need runs somewhat above the state's typical profile, with 71.6% of students eligible for free meals.
By headcount it is one of the larger campuses in California, bigger than 99% of state schools at 3,127 students.
Its Resource Investment Index sits near the middle of the pack among 9,998 scored California schools.
Against 115 statewide peers matched on enrollment and economic need, it ranks mid-pack at #57.
Its student body is predominantly Hispanic or Latino (89% of enrollment), among the less diverse in the state (diversity index 21/100).
On the academic-pipeline side it reports 14 Advanced Placement courses.
Counselor access is stretched at roughly 447 students per counselor, well above the ASCA-recommended 250:1 ceiling.
The federal civil-rights collection also records 13 expulsions at this campus for 2021-22.
Among Ontario's high schools, it stands alongside Colony High (2,109 students): Chaffey High is larger than that campus by headcount and runs leaner classes (22.8:1 vs 24.2:1).
Chaffey Joint Union High also operates Etiwanda High (3,446 students) and Rancho Cucamonga High (3,221 students) alongside Chaffey High.
Sourced from NCES CCD, CRDC, and F-33 (federal records, not a quality verdict). How we source and compute this.
Source: National Center for Education Statistics Common Core of Data + CRDC + F-33 · 2024-25
How Chaffey High compares
Chaffey High on the metrics families compare, against 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 (what these measure)
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
$15,404
per pupil, district-wide
- below California avg of $16,509
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.
Overview
- Common Core of Data (June 2026): enrollment, staffing, and the student-teacher ratio above.
- Civil Rights Data Collection: discipline counts and program access (AP, gifted, special education).
- F-33 School District Finance Survey: the district-wide per-pupil spending figures below.
Three separate federal collections, each on its own reporting cadence - which is why this school's numbers line up on a consistent basis against every other school and state on this site, rather than mixing figures pulled from different survey years.
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
Funding & spending
District-wide per-pupil expenditure for Chaffey Joint Union High, which includes Chaffey High.
$15,404
Per student
-7%
vs California
Avg $16,509
-7%
vs U.S.
Avg $16,593
Revenue mix
Local 35.9%
State 52.9%
Federal 11.2%
Source: NCES F-33 School District Finance Survey District-level finance · FY 2021-22 Per-pupil expenditure reflects the district-wide average. Individual school budgets are not reported at the federal level.
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
- 3,446
- Students per teacher
- 24.6:1
- Resource Index
- 28/100
- 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
Similar high schools statewide
Matched by enrollment size and by staffing ratio across all of California, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~3,127 students)
Similar student-teacher ratio (~22.8:1)
Next steps
Verify locally before acting on Chaffey High's federal record.
- Compare Chaffey High against another school. Compare schools
- Chaffey Joint Union High's spending and staffing shape this school. District profile
- Confirm current enrollment and boundaries with the school. Choosing guide
Federal record (CCD 2024-25, CRDC 2021-22) - PlainSchools assigns no subjective rating; the composite quality score is a transparent, reproducible index computed from this cited federal data.
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.
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 40/100 (typical reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, AP course offerings, 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.
Is Chaffey High a good school?
Chaffey High earns 40/100 on the Resource Investment Index, with class sizes near the California median. It is also one of the largest schools in California. This is a resource snapshot, not an academic rating; see the Resource Investment Index question above for what the number does and doesn't measure.
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.
Related tools
Every figure on PlainSchools is rendered directly from the source NCES, CRDC and F-33 federal records, no number is typed in by an editor. Each school's figures reflect its most recent NCES/CRDC submission on file. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of June 2026.