Average
#5602 of 9,539 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
Data vintage
2022-23
Data vintage2022-23
How this school compares
California schools
#5,602 of 9,539
In Ontario
#28 of 37
public schools
In district
#9 of 10
Chaffey Joint Union High
Academic growth
7.8 / 10
Very Good
Shortlisting around Chaffey High?
Use this profile as one decision point, then compare nearby options, source confidence, and commute fit before picking a neighborhood around it.
Shortlist starter
Start with these real page-level signals, then use the full table and map below.
Chaffey High
High School in Ontario · grades 9th – 12th. Start here, then compare fit against nearby and district options.
Vina Danks Middle
0.2 mi away. Use as a geographic alternative in the same move search.
Stone Ridge Academy
0.6 mi away. Use as a geographic alternative in the same move search.
About Chaffey High
Chaffey High is a public high school in Ontario, CA, part of Chaffey Joint Union High. Chaffey High serves approximately 3,223 students, and covers grades 9th-12th, and has a 23.9:1 student-teacher ratio. Chaffey High has a current MySchoolScout rating of 5.9 out of 10 and ranks #5,602 of 9,539 schools in CA.
Structured state assessment records for Chaffey High show 31% math proficiency (multi-year average, 2009-2024) and 54% reading/ELA proficiency (multi-year average, 2009-2024).
What's said publicly about Chaffey High
Synthesized from public, attributable sources. Updated April 2026.
Sources (2)
- This school 5.9 · Average
- District avg 7.1
- CA avg 6.5
What Parents Should Know
Chaffey High is a large school: 3,223 students. Size usually brings more course choices and activities than a smaller school can staff, but kids can also blend into the crowd. Ask how the school keeps students known and supported.
Chaffey High runs 23.9:1 students to teachers, above the national average. That often means bigger classes. Ask how the school supports kids who need extra help, and whether there are teaching assistants or small-group time.
37% of students at Chaffey High were chronically absent in the 2022-23 school year, above the national average. Chronic absenteeism means missing 15 or more school days, and at high rates it drags on classroom pacing for everyone. Ask what the school does to help families get kids to class consistently.
Score Breakdown
Full Profile · 4/4 metricsView breakdown
View breakdown
View breakdown
View breakdown
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 30 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: 7.8/10.
How Chaffey High Compares
See how Chaffey High performs across key quality dimensions compared to state benchmarks.
Funding & Resources
Programs & Offerings
Data as of 2021-22 · Source: CRDC via Urban Institute · Learn more
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. WESTERN CHRISTIAN HIGH SCHOOL (rated 7.1/10, 1.1 miles away, in nearby Upland), which scores notably higher. Additionally, Upland High (rated 6.6/10, 1.7 miles away, in nearby Upland), which scores slightly 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 | 5.6 |
| STONE RIDGE ACADEMY Upland | 0.6 mi | 6.7 |
| Edison Elementary Ontario | 0.6 mi | 8.9 |
| Hawthorne Elementary Ontario | 0.6 mi | 5.8 |
| 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 | 6.4 |
| Citrus Elementary Upland | 0.9 mi | 4.2 |
| 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 | 7.2 |
| Elderberry Elementary Ontario | 1.3 mi | 6.6 |
| Kraft Academy Ontario | 1.4 mi | — |
| Upland Elementary Upland | 1.5 mi | 6.7 |
| MOUNT ZION CHRISTIAN SCHOOL Ontario | 1.6 mi | — |
| Upland Junior High Upland | 1.6 mi | 5.1 |
| Upland High Upland | 1.7 mi | 6.6 |
| El Camino Elementary Ontario | 1.6 mi | 7.3 |
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
Similar Schools
Schools in the same state with comparable level, size, and ratings
| School | Rating |
|---|---|
| Arvin High Arvin, CA | 5.9 |
| Highland High Bakersfield, CA | 5.9 |
| La Habra High La Habra, CA | 5.9 |
| Rio Mesa High Oxnard, CA | 5.9 |
| Valley High Santa Ana, CA | 5.9 |
| Ventura High Ventura, 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 ranks #5,602 of 9,539 schools in CA.
What is Chaffey High's MySchoolScout rating?
Chaffey High has a current MySchoolScout rating of 5.9 out of 10. This score combines the level-appropriate components shown in the rating breakdown; equity data is shown separately for context.
What are the test scores at Chaffey High?
Based on loaded state assessment records, Chaffey High has 31% math proficiency (multi-year average, 2009-2024) and 54% reading/ELA proficiency (multi-year average, 2009-2024).
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
Powered by 
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
- Chronic Absenteeism (SY 2022-23)
- 37.4%
- Phone
- (909) 988-5560
- 4-Year Graduation
- 83.0%
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
A clear 1–10 score built from public data — growth, academics, and learning environment. No hidden criteria, no pay-to-play.
See how we rateRelated reading
- Best Elementary Schools in America: 2026 Rankingsbest schools
- Best Public Schools in California 2026: Top-Ranked Elementary, Middle & High Schoolsbest schools
- Best School Districts to Move To in 2026: A Data-Driven Guidebest schools
- Best Schools in Los Angeles, CA — 2026 Rankingsbest schools
- Best Schools in San Diego, CA — 2026 Rankingsbest schools
Get school insights in your inbox
New rankings, best-schools lists, and parent guides — delivered free. No spam, unsubscribe anytime.
We respect your privacy. Unsubscribe at any time.