Chaffey Joint Union High School District
School District · Ontario, California
Avg Rating
7.1
out of 10
Schools
11
11 high
Enrollment
22,628
Student-Teacher Ratio
24.1:1
Avg Rating
7.1
out of 10
Schools
11
11 high
Enrollment
22,628
Student-Teacher Ratio
24.1:1
Evaluating Chaffey Joint Union High?
A district shares budget, policy, and attendance zones across its schools — use this page to judge Chaffey Joint Union High as a whole, then compare how its individual schools differ.
Shortlist starter
Start with these real page-level signals, then use the full table and map below.
Chaffey District Online High
Ontario · High. Compare this profile against district averages, level fit, and attendance-zone reality below.
Los Osos High
Rancho Cucamonga · High. Compare this profile against district averages, level fit, and attendance-zone reality below.
Alta Loma High
Alta Loma · High. Compare this profile against district averages, level fit, and attendance-zone reality below.
How this district compares
California rank
#178 of 713
districts by avg. composite
Vs. state average
+0.8
above California avg
Per-pupil spending
$16,769
$878 vs California median
District size
22,628 students
Much larger than California median
The short answer
Chaffey Joint Union High ranks #178 of 713 California districts by overall school rating. Chaffey Joint Union High's schools with real test data average 7.1/10 across 10 schools. Its top-rated schools are Chaffey District Online High (8.5/10), Los Osos High (7.7/10), and Alta Loma High (7.5/10). Schools with estimated (proxy) scores are excluded from this ranking.
Rates 8.5/10 despite 54% of students being economically disadvantaged. That's about 1.2 points higher than its student-poverty level predicts. Roughly as clean a case of strong results without an affluent-ZIP price tag as you'll find among Chaffey Joint Union High schools.
Top-Rated Schools in Chaffey Joint Union High
Ranked by MySchoolScout composite rating using only schools with real test data (10 of 11). "Value" = points above what student poverty predicts. Estimated (proxy) scores are excluded.
| # | School | Rating |
|---|---|---|
| 1 | Chaffey District Online High | 8.5 / 10 |
| 2 | Los Osos High | 7.7 / 10 |
| 3 | Alta Loma High | 7.5 / 10 |
| 4 | Rancho Cucamonga High | 7.3 / 10 |
| 5 | Montclair High | 7.2 / 10 |
| 6 | Etiwanda High | 7.0 / 10 |
| 7 | Ontario High | 7.0 / 10 |
| 8 | Colony High | 6.8 / 10 |
| 9 | Chaffey High | 5.9 / 10 |
| 10 | Valley View High (continuation) | 5.8 / 10 |
See all 11 schools — including those with estimated data — in the full directory below. How we rate schools.
About Chaffey Joint Union High
Chaffey Joint Union High is a Ontario, California school district serving 11 schools.The district educates 22,628 students with a student-teacher ratio of 24.1:1. District-level spending was $16,769 per student in fiscal year 2023 (NCES F-33).
With an average rating of 7.1/10, Chaffey Joint Union High is among the strongest-performing districts in the state.
The highest-rated school in the district is Chaffey District Online High, which has a composite score of 8.5/10.
In standardized testing, Chaffey Joint Union High students show an average math proficiency of 40.6% and ELA proficiency of 59.2%.
The district includes 11 high schools.
District Map
Schools in Chaffey Joint Union High, colored by MySchoolScout rank. Click a pin for details.
District Average Test Scores
Average proficiency across all schools in Chaffey Joint Union High with test data.
Schools in Chaffey Joint Union High
11 schoolsDistrict Details
- State
- California
- City
- Ontario
- Total Enrollment
- 22,628
- Teachers (FTE)
- 939
- District spending per student
- $16,769NCES F-33 · FY 2023 · This annual source is three years behind the current year.
- Child poverty rate
- 12.1%Census SAIPE · 2024
- District directory year
- 2023
Frequently Asked Questions
How many schools are in Chaffey Joint Union High?
Chaffey Joint Union High has 11 schools in total — 11 high schools. You can explore each school's ratings and details on this page.
What is the average rating for Chaffey Joint Union High?
The average composite rating for Chaffey Joint Union High is 7.1/10. This score is calculated from the individual ratings of all schools with academic data in the district.
What is the district spending per student in Chaffey Joint Union High?
Chaffey Joint Union High's district-level spending was $16,769 per student in fiscal year 2023, according to NCES F-33. This is district context, not an individual-school expense.
What is the student-teacher ratio in Chaffey Joint Union High?
The average student-teacher ratio in Chaffey Joint Union High is 24.1:1.
What is the top-rated school in Chaffey Joint Union High?
Chaffey District Online High is the highest-rated school in Chaffey Joint Union High with a composite score of 8.5/10.
What are the test scores in Chaffey Joint Union High?
Across schools in Chaffey Joint Union High with test data, the average math proficiency is 40.6% and the average ELA (reading/writing) proficiency is 59.2%. These figures represent the percentage of students meeting or exceeding grade-level standards.
How does Chaffey Joint Union High compare to other districts in California?
Chaffey Joint Union High has an average school rating of 7.1/10 across 11 schools. Families can compare this to other districts in California by visiting individual district pages. Factors like school size, available programs, and community demographics also play a role in choosing the right fit.
How does MySchoolScout rate schools?
MySchoolScout ratings blend student growth, poverty-adjusted academic performance, and learning environment — plus college readiness for high schools. Weights vary by school level, and equity data is shown for context without being factored into the score. Learn more about our rating system on our methodology page.
District Averages
- Overall Rating
- 7.1/10
- Math Proficiency
- 40.6%
- ELA Proficiency
- 59.2%
How we rate schools
A clear 1–10 score built from public data — growth, academics, and learning environment. No hidden criteria, no pay-to-play.
See how we rateOther School Districts in CA
Compare Chaffey Joint Union High with neighboring districts in the state.
- Los Angeles Unified (785)
- San Diego Unified (175)
- San Francisco Unified (113)
- Fresno Unified (101)
- Long Beach Unified (82)
- Oakland Unified (82)
- San Bernardino City Unified (76)
- Sacramento City Unified (73)
- San Juan Unified (68)
- Elk Grove Unified (67)
- Garden Grove Unified (66)
- Capistrano Unified (59)
- Stockton Unified (54)
- West Contra Costa Unified (54)
- Corona-norco Unified (53)
- Mt. Diablo Unified (52)
- Santa Ana Unified (52)
- Clovis Unified (50)
- Lodi Unified (49)
- Riverside Unified (49)
- Bakersfield City (45)
- Irvine Unified (45)
- Fontana Unified (44)
- Fremont Unified (44)
Data from NCES Common Core of Data, California Dept. of Education, and U.S. Census ACS for the 2023–24 school year. Rankings computed by MySchoolScout. See all data sources.
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