For the 2026 school year, there are 9 public schools serving 2,652 students in Ontario, OR (there are , serving 44 private students). 98% of all K-12 students in Ontario, OR are educated in public schools (compared to the OR state average of 90%).
The top-ranked public schools in Ontario, OR are Annex Charter School, Ontario High School and Pioneer Elementary School. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.
Ontario, OR public schools have an average math proficiency score of 21% (versus the Oregon public school average of 31%), and reading proficiency score of 40% (versus the 44% statewide average). Schools in Ontario have an average ranking of 4/10, which is in the bottom 50% of Oregon public schools.
Minority enrollment is 70% of the student body (majority Hispanic), which is more than the Oregon public school average of 42% (majority Hispanic).
Best Public Schools in Ontario, OR (2026)
School
(Math and Reading Proficiency)
(Math and Reading Proficiency)
Location
Quick Facts
Rank: #11.
Annex Charter School
Charter School
(Math: 40-49% | Reading: 50-59%)
Rank:
Rank:
8/
Top 30%10
402 Annex Rd
Ontario, OR 97914
(541) 262-3280
Ontario, OR 97914
(541) 262-3280
Gr: K-8 | 79 students Student-teacher ratio: 9:1 Minority enrollment: 34%
Rank: #22.
Ontario High School
(Math: 15-19% | Reading: 55-59%)
Rank:
Rank:
6/
Top 50%10
1115 W Idaho Ave
Ontario, OR 97914
(541) 889-5309
Ontario, OR 97914
(541) 889-5309
Gr: 9-12 | 691 students Student-teacher ratio: 16:1 Minority enrollment: 72%
Rank: #33.
Pioneer Elementary School
(Math: 30-39% | Reading: 30-39%)
Rank:
Rank:
5/
Bottom 50%10
4744 Pioneer Rd
Ontario, OR 97914
(541) 262-3902
Ontario, OR 97914
(541) 262-3902
Gr: K-5 | 112 students Student-teacher ratio: 14:1 Minority enrollment: 60%
Rank: #44.
Alameda Elementary School
(Math: 28% | Reading: 34%)
Rank:
Rank:
4/
Bottom 50%10
1252 Alameda Dr
Ontario, OR 97914
(541) 889-5497
Ontario, OR 97914
(541) 889-5497
Gr: K-6 | 339 students Student-teacher ratio: 14:1 Minority enrollment: 67%
Rank: #55.
Aiken Elementary School
(Math: 30-34% | Reading: 25-29%)
Rank:
Rank:
4/
Bottom 50%10
1297 W Idaho Ave
Ontario, OR 97914
(541) 889-5584
Ontario, OR 97914
(541) 889-5584
Gr: K-5 | 264 students Student-teacher ratio: 18:1 Minority enrollment: 64%
Rank: #66.
Ontario Middle School
(Math: 12% | Reading: 48%)
Rank:
Rank:
4/
Bottom 50%10
573 Sw 2nd Ave
Ontario, OR 97914
(541) 889-5377
Ontario, OR 97914
(541) 889-5377
Gr: 7-8 | 333 students Student-teacher ratio: 14:1 Minority enrollment: 68%
Rank: #77.
Four Rivers Community School
Charter School
(Math: 15-19% | Reading: 35-39%)
Rank:
Rank:
3/
Bottom 50%10
2449 Sw 4th Ave
Ontario, OR 97914
(541) 889-3715
Ontario, OR 97914
(541) 889-3715
Gr: K-12 | 362 students Student-teacher ratio: 17:1 Minority enrollment: 84%
Rank: #88.
May Roberts Elementary School
(Math: 19% | Reading: 33%)
Rank:
Rank:
3/
Bottom 50%10
590 Nw 8th St
Ontario, OR 97914
(541) 889-5379
Ontario, OR 97914
(541) 889-5379
Gr: K-6 | 348 students Student-teacher ratio: 15:1 Minority enrollment: 71%
Rank: #99.
Cairo Elementary School
(Math: 15-19% | Reading: 20-29%)
Rank:
Rank:
2/
Bottom 50%10
531 Hwy 20/26
Ontario, OR 97914
(541) 889-5745
Ontario, OR 97914
(541) 889-5745
Gr: K-5 | 124 students Student-teacher ratio: 12:1 Minority enrollment: 73%
Frequently Asked Questions
What are the top-ranked public schools in Ontario, OR?
The top-ranked public schools in Ontario, OR include Annex Charter School, Ontario High School and Pioneer Elementary School.
How many public schools are located in Ontario?
9 public schools are located in Ontario.
What percentage of students in Ontario go to public school?
98% of all K-12 students in Ontario are educated in public schools (compared to the OR state average of 90%).
What is the racial composition of students in Ontario?
Ontario public schools minority enrollment is 70% of the student body (majority Hispanic), which is more than the Oregon public schools average of 42% (majority Hispanic).
Which public schools in Ontario are often viewed compared to one another?
Popular comparisons of public schools in Ontario include: Pioneer Elementary School vs. Alameda Elementary School, May Roberts Elementary School vs. Four Rivers Community School, Four Rivers Community School vs. May Roberts Elementary School
Recent Articles
Multilingual Learner Growth Models & Accountability
Learn how multilingual learner growth models are reshaping school accountability systems and what it means for public schools in 2026.
School-Based Health Clinics: Funding, Billing, and Student Access
Learn how school-based health clinics are funded, how billing works, and how students access care in public schools.
Outdoor Learning in Urban Schools: Forest School Programs
Explore how urban districts adopt outdoor learning and forest school programs to boost student engagement, well-being, and academic success.