For the 2026 school year, there are 7 public elementary schools serving 1,628 students in Ontario, OR.
The top-ranked public elementary schools in Ontario, OR are Annex Charter School, Pioneer Elementary School and Alameda Elementary School. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.
Ontario, OR public elementary schools have an average math proficiency score of 25% (versus the Oregon public elementary school average of 33%), and reading proficiency score of 34% (versus the 44% statewide average). Elementary schools in Ontario have an average ranking of 3/10, which is in the bottom 50% of Oregon public elementary schools.
Minority enrollment is 69% of the student body (majority Hispanic), which is more than the Oregon public elementary school average of 41% (majority Hispanic).
Best Public Elementary 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.
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: #33.
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: #44.
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: #55.
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: #66.
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: #77.
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 elementary schools in Ontario, OR?
The top-ranked public elementary schools in Ontario, OR include Annex Charter School, Pioneer Elementary School and Alameda Elementary School.
How many public elementary schools are located in Ontario?
7 public elementary schools are located in Ontario.
What is the racial composition of students in Ontario?
Ontario public elementary schools minority enrollment is 69% of the student body (majority Hispanic), which is more than the Oregon public elementary schools average of 41% (majority Hispanic).
Which public elementary schools in Ontario are often viewed compared to one another?
Popular comparisons of public elementary 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
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