Average
#5736 of 9,533 schools in CA
Chaffey High
High School · Chaffey Joint Union High
1245 North Euclid Ave., Ontario, CA 91762
Enrollment
3,223
Student-Teacher
23.9:1
Score
5.9
Grades
9th – 12th
Enrollment
3,223
Student-Teacher
23.9:1
Score
5.9
Grades
9th – 12th
Updated
2022-23
Updated 2022-23
How this school compares
In Ontario
#31 of 37
public schools
California high schools
#1,230 of 1,892
In district
#9 of 10
Chaffey Joint Union High
Academic growth
8.2 / 10
Very strong
About Chaffey High
Chaffey High serves 3,223 students in grades 9-12 in Ontario, California, operating as a comprehensive public high school with 135 full-time equivalent teachers and a student-teacher ratio of 23.9:1. The school holds a MySchoolScout rating of 5.4 out of 10 and ranks in the 48th percentile among California high schools. Academically, Chaffey High shows mixed performance with notable strengths in English Language Arts, where 55% of students score proficient or above across grade levels.
Mathematics presents an area with significant room for growth, as 19% of students achieve proficiency. The school's academic focus centers on supporting student development across these core subject areas. Located on North Euclid Avenue, Chaffey High sits within a diverse community where the median household income reaches $74,245 and median home values average $512,800.
The surrounding ZIP code serves nearly 63,000 residents, with 19% holding bachelor's degrees or higher and a poverty rate of 13.2%. As one of the larger high schools in the region, Chaffey High provides educational opportunities for students from varied socioeconomic backgrounds in this mid-size city setting of San Bernardino County.
What's said publicly about Chaffey High
Synthesized from public, attributable sources. Updated April 2026.
Sources (2)
What Parents Should Know
Chaffey High is a large school with 3,223 students enrolled. Larger schools typically offer a wider range of academic programs, electives, and extracurricular activities. Parents may want to ask about how the school maintains a sense of community and ensures students don't get lost in the crowd.
The student-teacher ratio at Chaffey High is 23.9:1, which is higher than the national average. This may mean larger class sizes, so parents should ask about classroom support, teaching assistants, and how the school differentiates instruction for students who need extra help.
Score Breakdown
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Chaffey High — Students at Chaffey High score 37% proficient, which is above what's typical for similar communities (expected: 29%).
Equity & Diversity
Shown separately, not included in overall scoreFree/Reduced Lunch
80.8%
Students qualifying for federal meal assistance
Test Scores CA CAASPP (2023-24)
Based on 8 test records from CA state assessments. About our data
Proficiency Trend
→ StableAverage proficiency (% at or above grade level) across Math & ELA over time.
* COVID-affected year — test participation was uneven nationwide. This data is weighted at 50% in the Growth score calculation.
Source: EdFacts (NCES) and state assessment data. Growth score: 8.2/10.
How Chaffey High Compares
See how Chaffey High performs across key quality dimensions compared to state benchmarks.
Funding & Resources
Performance Trends
Math proficiency has remained stable from 20% (2019) to 18.75% (2024). Reading/ELA proficiency has improved from 51% (2019) to 54.66% (2024).
Location
1245 North Euclid Ave., Ontario, CA 91762
Nearby Alternatives
Families considering Chaffey High may also want to explore other high schools in the area. Upland High (rated 7.9/10, 1.7 miles away, in nearby Upland), which scores notably higher. Additionally, WESTERN CHRISTIAN HIGH SCHOOL (rated 7.1/10, 1.1 miles away, in nearby Upland), which scores notably higher. For more schools in Ontario, see our Ontario schools guide .
Nearby Schools
20 within 1.6 mi| School | Distance | Rating |
|---|---|---|
| Vina Danks Middle Ontario | 0.2 mi | 6.2 |
| STONE RIDGE ACADEMY Upland | 0.6 mi | 6.7 |
| Edison Elementary Ontario | 0.6 mi | 8.2 |
| Hawthorne Elementary Ontario | 0.6 mi | 7.1 |
| Central Language Academy Ontario | 0.7 mi | 7.5 |
| ST GEORGE PARISH SCHOOL Ontario | 0.9 mi | 5.1 |
| St. George Ontario | 0.9 mi | — |
| INLAND CONSERVATORY FOR THE PERFORMING ARTS SCHOOL Ontario | 1.0 mi | 7.6 |
| Berlyn Elementary Ontario | 0.8 mi | 8.2 |
| Citrus Elementary Upland | 0.9 mi | 7.0 |
| WESTERN CHRISTIAN HIGH SCHOOL Upland | 1.1 mi | 7.1 |
| AMERICAN CHRISTIAN MILITARY ACADEMY OF EXCELLENCE Claremont | 1.1 mi | — |
| Lincoln Elementary Ontario | 1.2 mi | 7.1 |
| Elderberry Elementary Ontario | 1.3 mi | 5.3 |
| Kraft Academy Ontario | 1.4 mi | — |
| Upland Elementary Upland | 1.5 mi | 7.6 |
| MOUNT ZION CHRISTIAN SCHOOL Ontario | 1.6 mi | — |
| Upland Junior High Upland | 1.6 mi | 6.2 |
| Upland High Upland | 1.7 mi | 7.9 |
| El Camino Elementary Ontario | 1.6 mi | 8.1 |
Neighborhood Census ACS (2019-2023)
Census data for ZIP 91762 (ACS 2019-2023 5-Year Estimates) · Data sources
Median Income
$76,289
Median Home Value
$568,700
Median Rent
$1,752/mo
Population
63,656
College Educated
21.3%
Homeownership
58.4%
Avg Commute
31.4 min
Poverty Rate
12.9%
Median Age
33.9
Community Profile
The community surrounding Chaffey High has a median household income of $76,289. It is a community where 21% of adults hold a bachelor's degree or higher. The median home value in the area is $568,700, with a median rent of $1,752/month. The area has a poverty rate of 12.9%. The average commute for residents is 31 minutes. Source: U.S. Census ACS 2022 5-Year Estimates.
Similar Schools
Schools in the same state with comparable level, size, and ratings
| School | Rating |
|---|---|
| Beaumont Senior High Beaumont, CA | 5.9 |
| Chino High Chino, CA | 5.9 |
| East Bakersfield High Bakersfield, CA | 5.9 |
| Excelsior Charter Victorville, CA | 5.9 |
| Glendora High Glendora, CA | 5.9 |
| Golden Valley High Merced, CA | 5.9 |
Frequently Asked Questions
Common questions about Chaffey High
What grades does Chaffey High serve?
Chaffey High serves students in grades 9th through 12th.
How many students attend Chaffey High?
Chaffey High has an enrollment of approximately 3,223 students.
What is the student-teacher ratio at Chaffey High?
The student-teacher ratio at Chaffey High is 23.9:1. A lower ratio generally means more individual attention per student. The national average is approximately 16:1 for public schools.
How does Chaffey High rank in CA?
Chaffey High is ranked #5736 out of 9,533 schools in CA.
What is Chaffey High's MySchoolScout rating?
Chaffey High has a composite rating of 5.9 out of 10 on MySchoolScout. This score combines academic performance, student growth, and school environment into a single score. Equity data is shown separately for context.
What are the test scores at Chaffey High?
Based on the most recent state assessment data, Chaffey High has 22.4% math proficiency and 55.1% reading/ELA proficiency.
Is Chaffey High a charter school?
No, Chaffey High is not a charter school. It is a traditional public school operated by the local school district.
Is Chaffey High a Title I school?
No, Chaffey High is not currently a Title I school.
What does the Free & Reduced Lunch percentage mean for Chaffey High?
80.8% of students at Chaffey High qualify for free or reduced-price lunch. This is a commonly used indicator of economic need and provides important context when interpreting test scores.
Explore More Schools
Neighborhood Context
Quick Facts NCES CCD (SY 2022-23)
- Grades
- 9th – 12th
- Enrollment
- 3,223
- Student-Teacher Ratio
- 23.9:1
- Teachers (FTE)
- 135
- Free/Reduced Lunch
- 80.8%
- Type
- regular
- Setting
- Midsize City
- County
- San Bernardino County
- Phone
- (909) 988-5560
- Data Year
- 2023–2024
Resources & Links
District
Chaffey Joint Union High- District Enrollment
- 22,628
- Schools in District
- 11
- Per-Pupil Spending
- $16,769
- District Rank
- #9 of 10
Other Schools in This District
How We Rate Schools
Every school receives a composite score from 1 to 10 based on four pillars: Academic Performance (50%), Student Growth (20%), Equity (15%), and Learning Environment (15%). Scores are built from publicly available data including standardized test results, enrollment figures, and school climate indicators.
Read our full methodologyRelated reading
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