- Enrollment
- 3,446
- Students per teacher
- 24.6:1
- Resource Index
- 28/100
High school (grades 9-12) · Ontario, CA
Ontario High
Federal NCES profile for Ontario High, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 27/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 060816000795
👥 S:T ratio 17
🌟 Gifted program 70
🎓 Counselors 20
📋 Attendance 0
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Ontario High earns 27/100 on the Resource Investment Index, with class sizes near the California median. It is also one of the largest schools in California.
- #5 of 6
- high schools in Ontario · Resource Index
- 27
- Resource Index · Lower
- 20.8:1
- students per teacher
- 74.8%
- free-lunch eligible
Ontario High has class sizes near the California median. Computed live against every California school reporting to NCES.
By Resource Investment Index, Ontario High ranks #5 of 6 high schools in Ontario, CA.
School address
District: Chaffey Joint Union High · California
NCES ID 060816000795 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
-61 students YoY
Ontario High held near 2,121 students from 2022-23 to 2023-24 (-61 headcount).
Teacher FTE lost 96.7 → 95.5 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Steady CCD campus
-61 students YoY 060816000795 · Ontario, CA High · MID · TRAD
1,994 enr · 20.8:1 · 74.8% lunch · RII 27
Nearest enrollment peer: Etiwanda High (3,446 students)
Ontario High held near 2,121 students from 2022-23 to 2023-24 (-61 headcount). Teacher FTE lost 96.7 → 95.5 across the same CCD years. Read with this school → · District book → · California schools → · Find another →
Ontario 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
Ontario High
1,994 students
What this shows Ontario High reports 1,994 students on the CCD universe file.
How Ontario High compares
Ontario 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 | 20.8:1 | ▼ 3% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 74.8% | ▲ 35% | 55.5% | 51.7% |
| Enrollment | 1,994 | top 3% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
20.8:1
Leaner classes than 13% of US schools, heavier class loads than most.
1,994
Bigger than 98% of US schools by enrollment, a large campus nationally.
Equity indicators methodology
Economic need
74.8%
free-lunch eligible
- 35% 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
20.8:1
students per teacher
- 3% below state mean
Top 42% in California - lower ratio than 58% of state schools
Above 20:1, running heavier than the typical U.S. public school; staffing is comparatively stretched.
Engagement
49.0%
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 399 students, the combined health-and-guidance staffing load for this school.
Discipline context
1
in-school suspensions + 182 out-of-school
Suspension rate: 0.1 per 100 students. Combined in-school and out-of-school rate: 9.2 per 100 students. Reported via the Civil Rights Data Collection. Includes 4 expulsions.
Student demographics
Hispanic or Latino 89.0%
Asian 3.3%
African American 2.7%
White 2.4%
Two or More 1.5%
American Indian / Alaska Native 0.8%
Native Hawaiian / Pacific Islander 0.4%
Largest group: Hispanic or Latino at 89.0% of enrollment.
Student-body diversity index 20.5/100
Simpson diversity index - at 20.5, Ontario High is less mixed than the California school average of 46.0.
Programs
AP courses offered 12
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 Ontario High Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Etiwanda High | Larger | Lower economic need | Higher S:T ratio |
| Rancho Cucamonga High | Larger | Lower economic need | Higher S:T ratio |
| Chaffey High | Larger | Similar economic need | Higher S:T ratio |
| Los Osos High | Larger | Lower economic need | Higher S:T ratio |
| Montclair High | Larger | Similar economic need | Higher S:T ratio |
Comparisons are relative to Ontario 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
Colony High
Standard public school
2,109 students 24.2:1 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 (~1,994 students)
Similar student-teacher ratio (~20.8:1)
Frequently asked questions about Ontario High
How many students attend Ontario High?
Ontario High has 1,994 students enrolled. It is a high school in Ontario, CA. CCD year-over-year: 2,182 (2022-23) → 2,121 (2023-24), nearly flat (-61).
What is the student-teacher ratio at Ontario High?
The student-teacher ratio at Ontario High is 20.8:1, which is 3% lower than the California average of 21.5:1 and 32% higher than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What percentage of students receive free lunch at Ontario High?
74.8% of students at Ontario High are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Ontario High?
The largest demographic group at Ontario High is Hispanic or Latino at 89.0% of enrollment, in Ontario, CA.
What is the Resource Investment Index for Ontario High?
Ontario High has a Resource Investment Index of 27/100 (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 Ontario High rank among high schools in Ontario?
By Resource Investment Index, Ontario High ranks #5 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 Ontario 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.