Photo: Originally uploaded by Rockero (Transferred by JaumeBG) · Public domainOntario’s public schools outscore 51% of California districts
The grade covers the four public school districts serving Ontario, from kindergarten through graduation, on state tests and graduation. In Ontario, 27% of tested students are proficient in math, below the California average (33%). Each state writes its own tests, so this is the one TownRatings grade compared within California, not nationally.
From California state tests taken in spring 2022, when 97% of students in the tested grades sat them, and the class of 2023’s four-year graduation rate, as reported to the U.S. Department of Education.
Ontario’s schools, in brief
Against towns with similar incomes
Among the 594 California towns with household incomes within a quarter of Ontario’s, its schools beat 45%, lower than their 51% against all the state’s districts. The grade ↓
Above the state in reading, below in math
Reading proficiency is 47% and math 27% across its districts in spring 2022, against 47% and 33% statewide; 90% of the class of 2023 graduated in four years, against 86%. Test scores ↓
Spending and class size
Chaffey Joint Union High spends $18,582 per student and Ontario-Montclair $24,222, against $21,206 across California (FY2024). Neither counts toward the grade. Districts ↓
22 elementary schools, then nine middle and three high schools
Which school depends on the address at every step. Enrollment is down 7% since 2020–21. See the path ↓
Choice beyond the district
Ontario Christian School (private), St. George Parish School (private), Port View Preparatory (private), Wesley College Preparatory School (private), Montecito Baptist School (private), San Antonio Christian School (private), The Good Shepherd Academy (private) and Mount Zion Christian School (private) are in town. Chaffey District Online High and Online Academy, online schools, are based here too; they aren’t counted as local schools. Every school ↓
Written from the figures on this page. Tests are from 2021–22, graduation from the class of 2023; each school’s own letter uses 2020–21 results.
What’s behind Ontario’s grade
B−: better than 51% of California school districts, #469 of 847 California towns. Graduation is above the California average; test scores are below it.
Where will my kid go?
Pick a grade. These are the public schools that serve Ontario, with each school’s own grade.
9th grade in Ontario · depends on your address
Chaffey High
Grades 9–12 · 3,127 students · 23:1 students per teacher
Colony High
Grades 9–12 · 2,109 students · 26:1 students per teacher
Ontario High
Grades 9–12 · 1,994 students · 22:1 students per teacher
10th grade in Ontario · depends on your address
Chaffey High
Grades 9–12 · 3,127 students · 23:1 students per teacher
Colony High
Grades 9–12 · 2,109 students · 26:1 students per teacher
Ontario High
Grades 9–12 · 1,994 students · 22:1 students per teacher
Parts of Ontario (16% of its land) are served by Chino Valley Unified instead. To confirm the school for a specific address, ask the district.
Four districts serve Ontario
Spending and class size are shown but don’t count toward the grade. Each district’s own page has every school.
Close to the state in reading
Ontario vs. its neighbors
Schools grades for the California towns that share Ontario’s borders.
| Town | Schools | Main districts |
|---|---|---|
| Ontario | B− | Ontario-Montclair K–8 · Mountain View Elementary K–8 · Cucamonga Elementary K–8 |
| Chino | A− | Chino Valley Unified K–12 · Chaffey Joint Union High 9–12 |
| Eastvale | B+ | Corona-Norco Unified |
| Rancho Cucamonga | A | Etiwanda Elementary K–8 · Alta Loma Elementary K–8 · Chaffey Joint Union High 9–12 |
| Upland | B+ | Upland Unified K–12 · Chaffey Joint Union High 9–12 |
| Fontana | B− | Fontana Unified K–12 · Chaffey Joint Union High 9–12 |
4 of the 5 neighbors share Chaffey Joint Union High with Ontario for grades 9–12, so their letters differ mainly through the lower grades.
Every school in Ontario
44 schools. Each public school’s letter compares its own 2020–21 reading and math results with California’s other public schools (the newest school-level results we have).
Left off: 3 public programs with fewer than 25 students (Baldy View ROP, Chaffey Community Day and Student Outreach & Academic Renaissance Academy).
Questions about Ontario’s schools
Are Ontario’s schools good?
They sit near the middle of California: the public schools Ontario children attend outscore 51% of California’s school districts on tests and graduation, a B− Schools grade, #469 of 847 California towns. Among towns with similar incomes they beat 45%. Tests are from 2021–22, graduation from the class of 2023.
What school district is Ontario in?
Chaffey Joint Union High School District, which runs grades 9–12 and enrolls 22,040 students in 11 schools (2024–25). Small parts of Ontario are served by Chino Valley Unified.
Where do Ontario kids go to high school?
One of 3 high schools, depending on your address: Chaffey High, Colony High and Ontario High.
What is Ontario’s graduation rate?
90% of the class of 2023 in Chaffey Joint Union High School District graduated in four years, against 86% across California.
How much does Ontario spend per student?
$18,582 in Chaffey Joint Union High School District, $24,222 in Ontario-Montclair School District, $15,248 in Mountain View Elementary School District and $24,442 in Cucamonga Elementary School District (FY2024), against $21,206 across California. Spending doesn’t count toward the grade.
Are there private schools in Ontario?
Yes: Ontario Christian School (religious, grades PK–12, 1,568 students), St. George Parish School (Catholic, grades K–8, 316 students), Port View Preparatory (special education, grades 1–12, 163 students), Wesley College Preparatory School (religious, grades 9–12, 150 students), Montecito Baptist School (religious, grades K–12, 96 students), San Antonio Christian School (religious, grades K–8, 60 students), The Good Shepherd Academy (nonsectarian, grades 1–8, 52 students) and Mount Zion Christian School (religious, grades PK–K, 11 students).
Parents talk
What Ontario families are saying about school.
Looking for colleges? Colleges near Ontario → They have their own page.
School data: state test results (2021–22, with participation) and four-year graduation rates (class of 2023) reported to the U.S. Department of Education (EDFacts via ED Data Express); each school’s own letter uses its 2020–21 results (EDFacts via the Urban Institute); schools and enrollment from NCES (2024–25; private schools 2023–24); spending from the Census Bureau’s school finance survey (FY2024). The School Grade is our own summary, graded within California. Stars are from neighbors.