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 high schools serving 22,539 students in Chaffey Joint Union High School District. This district's average high testing ranking is 9/10, which is in the top 20% of public high schools in California.
Public High Schools in Chaffey Joint Union High School District have an average math proficiency score of 34% (versus the California public high school average of 28%), and reading proficiency score of 66% (versus the 51% statewide average).
Public High School in Chaffey Joint Union High School District have a Graduation Rate of 90%, which is more than the California average of 86%.
The school with highest graduation rate is Los Osos High School, with 95% graduation rate. Read more about public school graduation rate statistics in California or national school graduation rate statistics.
Minority enrollment is 87% of the student body (majority Hispanic), which is more than the California public high school average of 79% (majority Hispanic).
Overview
This School District
This State (CA)
# Schools
11 Schools
2,817 Schools
# Students
22,539 Students
2,139,525 Students
# Teachers
938 Teachers
100,737 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%
11%
% Hispanic
65%
56%
% Black
8%
5%
% White
13%
22%
% Hawaiian
n/a
n/a
% Two or more races
4%
5%
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 High 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%
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