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#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

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

Sources: School's website Wikipedia

Synthesized from public, attributable sources. Updated April 2026.

Chaffey High School is a public high school located in Ontario, California, serving the northern Ontario and southern Rancho Cucamonga areas 2 . It is part of the Chaffey Joint Union High School District 2 . The campus covers approximately 65 acres, making it one of the largest high schools by area in the state 2 . Students in the district participate in various assessments, including the California Assessment of Student Performance and Progress (CAASPP) for juniors and the California Science Test (CAST) for seniors 1 . Advanced Placement (AP) exams are also administered, offering opportunities for college credit 1 . The district highlights achievements in Academic Decathlon and performing arts programs, such as drama, dance, choir, and band 1 . Superintendent Mathew Holton emphasizes the importance of attendance and preparation for these state and national assessments 1 .
Sources (2)
  1. www.cjuhsd.net
  2. en.wikipedia.org
Generated by AI from public sources. Every claim is grounded in a cited source. Report inaccuracy

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

Full Profile · 4/4 metrics
Student Progress8.2Excellent25%
Year-over-year improvement in student test scores.
View breakdown
Years of Data3
Annual Change+0.08 pts/yr
Data Period2019–2024
TrendStable
Academics7.3Very Good25%
Student proficiency on state tests, adjusted for community poverty levels.
View breakdown
Math Proficiency18.8%
Reading/ELA Proficiency54.7%
Math vs. State Avg-9.2 pts
Reading vs. State Avg-1.2 pts
Overall Proficiency37%
Expected (poverty-adj.)29%
vs. Expected+8.0 pts
Adjusted Percentile60th
College Readiness3.6Fair30%
Graduation rates, AP course participation, and IB availability.
View breakdown
AP Participation12.8%
IB ProgramNo
Resources & Environment4.9Below Average20%
Student-teacher ratio, per-pupil spending, and attendance.
View breakdown
Student-Teacher Ratio23.9:1
Per-Pupil Spending$15,468

Chaffey High — Students at Chaffey High score 37% proficient, which is above what's typical for similar communities (expected: 29%).

How we calculate scores →

Equity & Diversity

Shown separately, not included in overall score

Free/Reduced Lunch

80.8%

Students qualifying for federal meal assistance

Test Scores CA CAASPP (2023-24)

Math Proficiency 22.4%
School
State
31.8%
ELA Proficiency 55.1%
School
State
51.5%

Based on 8 test records from CA state assessments. About our data

Proficiency Trend

→ Stable

Average proficiency (% at or above grade level) across Math & ELA over time.

2019
Math
20%
ELA
51%
2021*
Math
32%
ELA
60%
2024
Math
18.8%
ELA
54.7%

* 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.

Overall Score
5.9/10
40th percentile in CA
Academic
7.3/10
7.3/10
Growth
8.2/10
Above average
Environment
4.9/10
Below average

Funding & Resources

Free/Reduced Lunch
Students eligible for subsidized meals
81%
Teaching Staff
24:1 student-teacher ratio
135 teachers

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.

11 schools nearby View map →

Neighborhood Context

Walk Score
39 Car-Dependent
Transit Score
26 Some Transit
Bike Score
40 Somewhat Bikeable
City Safety
High (2,102/100K)

Powered by Walk Score

FBI UCR 2024. City-level (Ontario). Data >1 year old.

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
Data Year
2023–2024

District

Chaffey Joint Union High
District Enrollment
22,628
Schools in District
11
Per-Pupil Spending
$16,769
District Rank
#9 of 10

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 methodology

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