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Best public schools in Ontario, OR

7 public schools in Ontario: 3 elementary · 1 middle · 1 high · 2 combined. Ranked by our score, based on 2025-26 state test results.

Rankings renumber to share equal ranks and fill gaps when schools are hidden. Scores compare each school with schools of the same type across Oregon.

Elementary schools

3 schools in Ontario, best first
1
Alameda Intermediate School 35.1
Ontario SD 8C · Grades 4-5 · 339 students
ELA 40%Math 28%Science 19%
#380 of 585 in Oregon
2
Aiken Elementary School 11.2
Ontario SD 8C · Grades 2-3 · 264 students
ELA 14%Math 25%
#520 of 585 in Oregon
–
May Roberts Primary School —
Ontario SD 8C · Grades K-1 · 348 students
No published test results

Middle schools

1 school in Ontario
1
Ontario Middle School 34.4
Ontario SD 8C · Grades 6-8 · 333 students
ELA 37%Math 26%Science 14%
#133 of 202 in Oregon

High schools

1 school in Ontario
1
Ontario High School 13.8
Ontario SD 8C · Grades 9-12 · 691 students
ELA 28%Math 3%Science 19%
#191 of 221 in Oregon

Combined schools

2 schools in Ontario, best first
1
Annex Charter School 72.3
Annex SD 29 · Grades K-12 · Charter · 79 students
ELA 49%Math 41%Science 36%
#26 of 92 in Oregon
2
Four Rivers Community School 54.9
Oregon Department of Education · Grades K-12 · Charter · 362 students
ELA 49%Math 28%Science 29%
#42 of 92 in Oregon

School districts serving Ontario

Nearby cities and towns