At a glance
Reported students
1,994
NCES CCD 2024–25
Teachers (FTE)
91.27
NCES CCD 2024–25
Student–teacher ratio
21.8:1
Calculated; not a class-size measure
Grades served
09–12
NCES preliminary directory 2025–26
School benchmarks
California high enrollment
87th percentile
Compared with 2,195 same-level schools reporting enrollment.
District median enrollment
2,386
Ontario High: 1,994 reported students.
State peer staffing position
71st percentile
21.8:1 reported; state peer median 19.2:1. Ratio is not class size.
Historical enrollment and staffing · CRDC 2021–22
These older figures are kept separate from 2024–25 statistics and benchmarks. Differences between years can reflect changes in enrollment, staffing, or reporting scope.
- Students
- 2,281
- Teachers (FTE)
- 99
- Student–teacher ratio
- 23:1
What the reported data says about Ontario High
Ontario High is a public high school serving grades 09–12 in Ontario. It is one of 11 current school records connected to Chaffey Joint Union High. NCES reports 1,994 students for 2024–25.
Among 2,195 high schools in California with comparable records, this school is larger than the reported median of 416 students. Its enrollment is at approximately the 87th percentile for that peer group. Size describes the campus, not instructional quality.
The reported student–teacher ratio is 21.8:1, above the California median of 19.2:1 for the same school level. This ratio uses total enrollment and teacher FTE; it is not an average classroom headcount and can be affected by special programs or part-time staffing.
The largest reported race and ethnicity groups are Hispanic or Latino (88.9%) and Asian (3.3%). English learners represent 11% of enrollment. Students served under IDEA represent 14.6%. These figures help families understand who the school serves; they are not rating inputs.
The 2021–22 civil-rights collection reports AP student enrollment, gifted and talented programming. The school reported 12 AP courses. Program availability changes, so families should confirm the current catalog and participation rules directly with the school.
Questions worth asking Ontario High
- 1How do the reported 21.8:1 student–teacher ratio and 91.27 teacher FTE translate into actual class sizes by grade?
- 2Have the reported academic programs changed since the 2021–22 CRDC collection?
- 3What counseling support is available today? The school reported 5 counselor FTE in 2021–22.
- 4Does community eligibility provide breakfast and lunch to every enrolled student, and are summer meals available?
Enrollment needs
- English learners
- 11%
- Students with disabilities
- 14.6%
- Free/reduced-price lunch
- 86.7%
- Lunch program
- Yes under Community Eligibility Option (CEO)
Reported support staff
- Counselors (FTE)
- 5
- Nurses (FTE)
- 1
- Psychologists (FTE)
- 1
- Social workers (FTE)
- 0
CRDC 2021–22 full-time-equivalent counts; verify current assignments with the school.
Student demographics
Race and ethnicity share of reported enrollment
- White2.4%
- Hispanic88.9%
- Black2.7%
- Asian3.3%
- American Indian / Alaska Native0.8%
- Native Hawaiian / Pacific Islander0.4%
- Multiracial1.5%
Race/ethnicity: NCES CCD 2024–25. English learner and disability context: CRDC 2021–22. Lunch eligibility: NCES CCD 2024–25. Privacy rules can produce missing values.
Programs reported by the school
AP student enrollment
Students enrolled
12 distinct courses reported
Gifted and talented
Offered
Computer science
Not reported as offered
CRDC 2021–22: the AP flag records student enrollment; gifted and computer-science fields describe reported programs/classes. Confirm current courses and eligibility with the school.
Other schools in Chaffey Joint Union High
Start with campuses at the same school level or with similar reported enrollment.
Colony High
High · Grades 09–12
2,109 reported students
Alta Loma High
High · Grades 09–12
2,386 reported students
Montclair High
High · Grades 09–12
2,515 reported students
Los Osos High
High · Grades 09–12
2,759 reported students
Chaffey High
High · Grades 09–12
3,127 reported students
Rancho Cucamonga High
High · Grades 09–12
3,221 reported students