Top Rankings
Chaffey Joint Union High School District ranks among the top 20% of public school district in California for:
Category
Attribute
Reading/Language Arts Proficiency
Highest reading/language arts proficiency (Top 20%)
Community Size
Largest student body (number of students) (Top 1%)
For the 2025 school year, there are 11 public schools serving 22,539 students in Chaffey Joint Union High School District. This district's average testing ranking is 8/10, which is in the top 30% of public schools in California.
Public Schools in Chaffey Joint Union High School District have an average math proficiency score of 34% (versus the California public school average of 34%), and reading proficiency score of 66% (versus the 47% statewide average).
Minority enrollment is 87% of the student body (majority Hispanic), which is more than the California public school average of 80% (majority Hispanic).
Overview
This School District
This State (CA)
# Schools
11 Schools
10,369 Schools
# Students
22,539 Students
5,826,838 Students
# Teachers
938 Teachers
268,018 Teachers
Student-Teacher Ratio
24:1
24:1
Student By Grade
District Rank
Chaffey Joint Union High School District, which is ranked #470 of all 1,910 school districts in California (based off of combined math and reading proficiency testing data) for the 2022-2023 school year.
The school district's graduation rate of 90% has increased from 89% over five school years.
Overall District Rank
#429 out of 1932 school districts
(Top 30%)
(Top 30%)
Math Test Scores (% Proficient)
35%
34%
Reading/Language Arts Test Scores (% Proficient)
66%
47%
Science Test Scores (% Proficient)
26%
29%
Graduation Rate
90%
87%
Students by Ethnicity:
Diversity Score
0.55
0.63
% American Indian
n/a
1%
% Asian
10%
12%
% Hispanic
65%
56%
% Black
8%
5%
% White
13%
20%
% Hawaiian
n/a
n/a
% Two or more races
4%
6%
All Ethnic Groups
District Revenue and Spending
The revenue/student of $20,960 is higher than the state median of $19,974. The school district revenue/student has grown by 5% over four school years.
The school district's spending/student of $17,424 is less than the state median of $18,396. The school district spending/student has grown by 5% over four school years.
Total Revenue
$472 MM
$116,387 MM
Spending
$393 MM
$107,188 MM
Revenue / Student
$20,960
$19,974
Spending / Student
$17,424
$18,396
Best Chaffey Joint Union High School District Public Schools (2025)
School
(Math and Reading Proficiency)
(Math and Reading Proficiency)
Location
Quick Facts
Rank: #11.
Los Osos High School
(Math: 51% | Reading: 81%)
Rank:
Rank:
9/
Top 20%10
6001 Milliken Ave.
Rancho Cucamonga, CA 91737
(909) 477-6900
Rancho Cucamonga, CA 91737
(909) 477-6900
Gr: 9-12 | 2,759 students Student-teacher ratio: 25:1 Minority enrollment: 73%
Rank: #22.
Etiwanda High School
(Math: 43% | Reading: 75%)
Rank:
Rank:
9/
Top 20%10
13500 Victoria St.
Rancho Cucamonga, CA 91739
(909) 899-2531
Rancho Cucamonga, CA 91739
(909) 899-2531
Gr: 9-12 | 3,540 students Student-teacher ratio: 25:1 Minority enrollment: 85%
Rank: #33.
Alta Loma High School
(Math: 42% | Reading: 75%)
Rank:
Rank:
9/
Top 20%10
8880 Baseline Rd.
Rancho Cucamonga, CA 91701
(909) 989-5511
Rancho Cucamonga, CA 91701
(909) 989-5511
Gr: 9-12 | 2,400 students Student-teacher ratio: 24:1 Minority enrollment: 76%
Rank: #44.
Rancho Cucamonga High School
(Math: 41% | Reading: 74%)
Rank:
Rank:
9/
Top 20%10
11801 Lark Dr.
Rancho Cucamonga, CA 91701
(909) 989-1600
Rancho Cucamonga, CA 91701
(909) 989-1600
Gr: 9-12 | 3,343 students Student-teacher ratio: 26:1 Minority enrollment: 79%
Rank: #55.
Chaffey District Online High School
Alternative School
(Math: ≥50% | Reading: ≥50%)
Rank:
Rank:
8/
Top 30%10
1802 East 7th St.
Ontario, CA 91764
(909) 985-0966
Ontario, CA 91764
(909) 985-0966
Gr: 9-12 | 112 students Student-teacher ratio: 22:1 Minority enrollment: 74%
Rank: #66.
Montclair High School
(Math: 31% | Reading: 62%)
Rank:
Rank:
7/
Top 50%10
4725 Benito St.
Montclair, CA 91763
(909) 621-6781
Montclair, CA 91763
(909) 621-6781
Gr: 9-12 | 2,605 students Student-teacher ratio: 24:1 Minority enrollment: 96%
Rank: #77.
Chaffey Community Day
Alternative School
(Math: <50% | Reading: <50% )
Rank:
Rank:
7/
Top 50%10
1802 East Seventh St.
Ontario, CA 91764
(909) 985-0966
Ontario, CA 91764
(909) 985-0966
Gr: 9-12 | 16 students Student-teacher ratio: 8:1 Minority enrollment: 94%
Rank: #88.
Colony High School
(Math: 25% | Reading: 62%)
Rank:
Rank:
7/
Top 50%10
3850 East Riverside Dr.
Ontario, CA 91761
(909) 930-2929
Ontario, CA 91761
(909) 930-2929
Gr: 9-12 | 2,085 students Student-teacher ratio: 24:1 Minority enrollment: 93%
Rank: #99.
Ontario High School
(Math: 21% | Reading: 60%)
Rank:
Rank:
6/
Top 50%10
901 West Francis St.
Ontario, CA 91762
(909) 988-7411
Ontario, CA 91762
(909) 988-7411
Gr: 9-12 | 2,121 students Student-teacher ratio: 22:1 Minority enrollment: 97%
Rank: #1010.
Chaffey High School
(Math: 18% | Reading: 54%)
Rank:
Rank:
5/
Bottom 50%10
1245 North Euclid Ave.
Ontario, CA 91762
(909) 988-5560
Ontario, CA 91762
(909) 988-5560
Gr: 9-12 | 3,223 students Student-teacher ratio: 24:1 Minority enrollment: 96%
Rank: #1111.
Valley View High (Continuation School)
Alternative School
(Math: ≤5% | Reading: 6-9%)
Rank:
Rank:
1/
Bottom 50%10
1801 East Sixth St.
Ontario, CA 91764
(909) 985-0966
Ontario, CA 91764
(909) 985-0966
Gr: 9-12 | 335 students Student-teacher ratio: 13:1 Minority enrollment: 94%
Frequently Asked Questions
How many schools belong to Chaffey Joint Union High School District?
Chaffey Joint Union High School District manages 11 public schools serving 22,539 students.
What is the rank of Chaffey Joint Union High School District?
Chaffey Joint Union High School District is ranked #470 out of 1,910 school districts in California (top 30%) based off of combined math and reading proficiency testing data for the 2022-2023 school year. This district ranks in the top 20% of California school districts for: Highest reading/language arts proficiency (Top 20%) and Largest student body (number of students) (Top 1%)
What is the racial composition of students in Chaffey Joint Union High School District?
65% of Chaffey Joint Union High School District students are Hispanic, 13% of students are White, 10% of students are Asian, 8% of students are Black, and 4% of students are Two or more races.
What is the student/teacher ratio of Chaffey Joint Union High School District?
Chaffey Joint Union High School District has a student/teacher ratio of 24:1, which is higher than the California state average of 22:1.
What is Chaffey Joint Union High School District's spending/student ratio?
The school district's spending/student of $17,424 is less than the state median of $18,396. The school district spending/student has grown by 5% over four school years.
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