Ontario High

901 West Francis St., Ontario, CA 91762

CSchola Grade
Grades
9–12
High
Students
1,994
Enrolled 2024–25
Students per teacher
21.8 : 1
Full-time teachers
District
Chaffey Joint Union High
San Bernardino County

Schola Grade C · Average

Letter grade (A–F) · compared with 1,321 California high schools · How we grade
Test scores41% proficient in math & reading
60thpercentile
Equity40% of low-income students proficient
74thpercentile
Attendance30% chronically absent
39thpercentile
Graduation rate91% graduate in 4 years
33rdpercentile
College readinessAt least 15% take AP, IB or dual-enrollment courses
23rdpercentile
Class size21.8 students per teacher
40thpercentile

Percentiles compare this school with other California high schools; the line marks the middle. Data: test scores 2021–22, graduation and absenteeism 2022–23 (U.S. Department of Education, EDFacts); coursework 2023–24 (Civil Rights Data Collection); staffing 2024–25 (NCES).

About Ontario High

Ontario High is a public high school in Ontario, California, serving grades 9–12. It is part of Chaffey Joint Union High. The school is located in a midsize city in San Bernardino County.

In the 2024–25 school year, 1,994 students were enrolled, with about 21.8 students for every full-time teacher. That ratio is larger than the typical California high school (18.5 students per teacher). Its Schola Grade is C (average), compared with 1,321 California high schools.

Grades & enrollment

Students per grade, 2024–25Grades 9–12

Location & nearby schools

901 West Francis St.
Ontario, CA 91762
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School details

Type
Public School · What this means
Level
High
Grades offered
9–12
Enrollment (2024–25)
1,994 students
Students per teacher
21.8 to 1
AP courses offered
9
Charter school
No
Magnet school
No
Virtual learning
Offers virtual courses
Locale
City — Midsize
School district
Chaffey Joint Union High
County
San Bernardino County
NCES school ID
060816000795

Schools near Ontario High

All 48 schools in Ontario →
Chino High
Public · Grades 9–12 · 2,077 students
C1.6 mi
Chaffey High
Public · Grades 9–12 · 3,127 students
C2.9 mi

School data comes from the U.S. Department of Education: the National Center for Education Statistics (NCES) Common Core of Data and EDGE school locations (2024–25) and Private School Survey (2023–24), the Civil Rights Data Collection (2023–24), and EDFacts (test results 2021–22; graduation and chronic absenteeism 2022–23), plus other public sources. Please contact the school to confirm enrollment, programs, and other details. How we source data.