For the 2026 school year, there are 8 public high schools serving 8,412 students in Ontario, CA.
The top-ranked public high schools in Ontario, CA are Chaffey District Online High School, Chaffey Community Day and Colony High School. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.
Ontario, CA public high schools have an average math proficiency score of 20% (versus the California public high school average of 28%), and reading proficiency score of 53% (versus the 51% statewide average). High schools in Ontario have an average ranking of 5/10, which is in the bottom 50% of California public high schools.
Ontario, CA public high school have a Graduation Rate of 85%, which is less than the California average of 86%.
The school with highest graduation rate is Colony High School, with 92% graduation rate. Read more about public school graduation rate statistics in California or national school graduation rate statistics.
Minority enrollment is 95% of the student body (majority Hispanic), which is more than the California public high school average of 79% (majority Hispanic).
Best Public High Schools in Ontario, CA (2026)
School
(Math and Reading Proficiency)
(Math and Reading Proficiency)
Location
Quick Facts
Rank: #11.
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: #22.
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: #33.
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: #44.
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: #55.
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: #66.
Entrepreneur High School
Charter School
(Math: 10-14% | Reading: 45-49%)
Rank:
Rank:
4/
Bottom 50%10
26655 Highland Ave.
Ontario, CA 91764
(909) 888-8458
Ontario, CA 91764
(909) 888-8458
Gr: 9-12 | 520 students Student-teacher ratio: 22:1 Minority enrollment: 94%
Rank: #77.
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%
Rank: n/an/a
Baldy View Rop
Vocational School
1501 South Bon View Ave.
Ontario, CA 91761
(909) 947-3400
Ontario, CA 91761
(909) 947-3400
Gr: 9-12
Ontario, California Public Schools (Closed)
School
Location
Quick Facts
2230 East Fourth St.
Ontario, CA 91764
(909) 395-3587
Ontario, CA 91764
(909) 395-3587
Gr: K | 321 students Student-teacher ratio: 19:1 Minority enrollment: 97%
4684 Ontario Mills Pkwy., Ste.
Ontario, CA 91764
(970) 258-0518
Ontario, CA 91764
(970) 258-0518
Gr: K-12 | 41 students Minority enrollment: 29%
4684 Ontario Mills Pkwy., Ste.
Ontario, CA 91764
(310) 527-1741
Ontario, CA 91764
(310) 527-1741
Gr: K-12 | 179 students Student-teacher ratio: 36:1 Minority enrollment: 53%
4684 Ontario Mills Pkwy., Ste.
Ontario, CA 91764
(855) 687-6249
Ontario, CA 91764
(855) 687-6249
Gr: 8-12 | 147 students Student-teacher ratio: 21:1 Minority enrollment: 49%
4684 Ontario Mills Pkwy, Ste.
Ontario, CA 91764
(855) 687-6249
Ontario, CA 91764
(855) 687-6249
Gr: K-7 | 148 students Student-teacher ratio: 12:1 Minority enrollment: 39%
4684 Ontario Mills Pkwy #100
Ontario, CA 91764
(310) 527-1741
Ontario, CA 91764
(310) 527-1741
Gr: K-12 | 2,412 students Student-teacher ratio: 38:1 Minority enrollment: 48%
4684 Ontario Mills Pkwy Ste. 1
Ontario, CA 91764
(714) 386-9346
Ontario, CA 91764
(714) 386-9346
Gr: K-12 | 157 students Student-teacher ratio: 20:1 Minority enrollment: 47%
4684 Ontario Mills Pkwy.
Ontario, CA 91764
(310) 527-1741
Ontario, CA 91764
(310) 527-1741
Gr: K-12 | 556 students Student-teacher ratio: 139:1 Minority enrollment: 43%
14630 Armstrong Woods Rd.
Ontario, CA 91764
(310) 527-1741
Ontario, CA 91764
(310) 527-1741
Gr: K-12 | 1,074 student Student-teacher ratio: 30:1 Minority enrollment: 35%
4684 Ontario Mills Pkwy.
Ontario, CA 91764
(818) 697-0535
Ontario, CA 91764
(818) 697-0535
Gr: K-12 | 27 students Minority enrollment: 52%
Canyon View High School (Closed 2011)
Alternative School
557 West Fifth St
Ontario, CA 91762
(909) 983-7102
Ontario, CA 91762
(909) 983-7102
Gr: 11-12
Dorothy Gibson County High School (Closed 2023)
Special Education School
1800 East Seventh Street
Ontario, CA 91764
Ontario, CA 91764
Gr: 6-12 | 109 students Student-teacher ratio: 14:1 Minority enrollment: 55%
1556 South Sultana Ave.
Ontario, CA 91761
(909) 983-5578
Ontario, CA 91761
(909) 983-5578
Gr: K | 317 students Student-teacher ratio: 17:1 Minority enrollment: 98%
Student Outreach Academic Recovery (S.o.a.r.) Prog (Closed 2011)
Alternative School
1556 South Sultana Ave
Ontario, CA 91761
(909) 418-6433
Ontario, CA 91761
(909) 418-6433
Gr: 6-8
4684 Ontario Mills Pkwy., Ste.
Ontario, CA 91764
(855) 687-6249
Ontario, CA 91764
(855) 687-6249
Gr: K-12 | 158 students Minority enrollment: 41%
4684 Ontario Mills Pkwy., Ste.
Ontario, CA 91764
(714) 323-7869
Ontario, CA 91764
(714) 323-7869
Gr: K-12 | 19 students Minority enrollment: 68%
4684 Ontario Mills Pkwy., Ste.
Ontario, CA 91764
(310) 527-1741
Ontario, CA 91764
(310) 527-1741
Gr: K-12 | 44 students Minority enrollment: 68%
Uplift California North Charter (Closed 2020)
Charter School
4684 Ontario Mills Pkwy., Ste.
Ontario, CA 91764
(415) 845-2423
Ontario, CA 91764
(415) 845-2423
Gr: 9-12 | 191 students Minority enrollment: 55%
2300 Highway 166
Ontario, CA 91764
(818) 697-0535
Ontario, CA 91764
(818) 697-0535
Gr: K-12 | 354 students Minority enrollment: 59%
Uplift California South Charter (Closed 2020)
Charter School
4684 Ontario Mills Pkwy., Ste.
Ontario, CA 91764
(415) 845-2423
Ontario, CA 91764
(415) 845-2423
Gr: 9-12 | 51 students Minority enrollment: 69%
4684 Ontario Mills Pkwy., Ste.
Ontario, CA 91764
(415) 845-2423
Ontario, CA 91764
(415) 845-2423
Gr: K-12 | 124 students Student-teacher ratio: 31:1 Minority enrollment: 42%
32248 Crown Valley Rd.
Ontario, CA 91764
(909) 287-3487
Ontario, CA 91764
(909) 287-3487
Gr: K-12 | 1,299 student Student-teacher ratio: 25:1 Minority enrollment: 45%
4612 Dehesa Rd.
Ontario, CA 91764
(909) 287-3487
Ontario, CA 91764
(909) 287-3487
Gr: K-12 | 2,550 students Student-teacher ratio: 49:1 Minority enrollment: 33%
4684 Ontario Mills Pkwy., Ste.
Ontario, CA 91764
(310) 527-1741
Ontario, CA 91764
(310) 527-1741
Gr: K-12 | 75 students Student-teacher ratio: 15:1 Minority enrollment: 29%
Frequently Asked Questions
What are the top-ranked public high schools in Ontario, CA?
The top-ranked public high schools in Ontario, CA include Chaffey District Online High School, Chaffey Community Day and Colony High School.
How many public high schools are located in Ontario?
8 public high schools are located in Ontario.
What is the racial composition of students in Ontario?
Ontario public high schools minority enrollment is 95% of the student body (majority Hispanic), which is more than the California public high schools average of 79% (majority Hispanic).
Which public high schools in Ontario are often viewed compared to one another?
Popular comparisons of public high schools in Ontario include: Chaffey High School vs. Colony High School, Colony High School vs. Chaffey High School