1
Enrollment
709
High
DISTRICT 344 · STATE 630
SCHOOL COMMUNITY·ONTARIO SD 8C·NCES 410927000746
Ontario High School
1115 W Idaho Ave, Ontario, OR 97914 · (541) 889-5309 · Malheur County
GRADES 09–12HIGH32-TOWNTITLE IREGULAR SCHOOL709 STUDENTS
C+
allk12 Grade
Scored higher than 42% of Oregon public high schools
- CTest scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
- BBeats expectations How far test scores land above or below what the share of low-income students predicts for a school in this state.
Grades compare a school only with schools in the same state, because every state gives its own test. How grades work · Top-graded Oregon public high schools
Student : Teacher
17.8:1
40 FTE teachers
DISTRICT 15.4:1 · STATE 19.8:1
Free / Reduced Lunch
100%
709 students
DISTRICT 101% · STATE 76%
Community
1
0 members
Enrollment and student:teacher ratio compared against other high schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade, 2024-25
| Grade | Students | Share |
|---|---|---|
| Grade 9 | 190 | 27% |
| Grade 10 | 184 | 26% |
| Grade 11 | 171 | 24% |
| Grade 12 | 164 | 23% |
Student demographics
46%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 48% · STATE 59% · US 70%
Student head counts by race/ethnicity from federal NCES enrollment data. District, state, and US figures are each group's share of all public school students in that area (US excludes territories). Very small groups may be suppressed in the source, so categories do not always sum exactly to total enrollment.
Gender split
School pathway
Feeds from
Based on grade levels within Ontario SD 8C. Attendance zones can vary; confirm enrollment with the district.
Test scores
OSAS 2024-25 . % ProficientEnglish Language Arts
32.5%
OR avg 43.0% . -8.6pp since 2023
Math
12.1%
OR avg 31.8% . +1.1pp since 2023
What this means: On the OSAS, Oregon's statewide test, about 33 of every 100 students at this school read and write at grade level and about 12 of 100 do math at grade level. Across all Oregon schools, those numbers are about 43 and 32. Reading and writing scores are down about 9 points since 2023, while math scores are up about 1 points.
OSAS results by year
| School year | English Language Arts | Math |
|---|---|---|
| 2024-25 | 32.5% | 12.1% |
| 2023-24 | 41.1% | 11.0% |
% Proficient, all students and all tested grades.
Source: OSAS. All students, all grades. See all years and grades →
BeatsExpectations
Demographically-adjusted score · methodologyTier
AS EXPECTED
Performing as predicted given the school's student profile
Actual proficiency
23.1%
composite math + reading, all grades
Predicted
23.8%
based on OR schools with similar FRL share
Beats by
-0.7pp
below demographic expectation
What this means: About 23% of students here test proficient in math and reading, compared with the roughly 24% typical for Oregon schools with a similar share of low-income students. BeatsExpectations measures results against demographically similar schools rather than by raw scores, and this school falls within the typical range, neither among Oregon's top nor bottom 10%.
BeatsExpectations runs a per-state regression of proficiency on free/reduced-lunch share, then scores each school by residual. How this is calculated →
Schools most like Ontario High School
Ontario High School's state test result (23.1% proficient) is higher than 1 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Ontario High School this school | 709 | 100.0% | 23.1% |
| Gervais High School Gervais | 324 | 99.4% | 24.4% |
| Nyssa High School Nyssa | 335 | 91.6% | 41.9% |
| Hermiston High School Hermiston | 1,705 | 91.8% | 36.2% |
| North Marion High School Aurora | 564 | 87.4% | 21.8% |
| The Dalles High School The Dalles | 795 | 99.2% | 28.6% |
Matched among Oregon high schools on enrollment, the share of students from low-income families (eligible for free or reduced-price lunch), and racial and ethnic makeup. Proficient is the average share of students meeting the state standard across all of the school's state tests in 2023-24 and 2024-25, the same combined score our test-score rankings use. Online schools and schools serving specialized populations are not matched.
Where Ontario High School ranks
Among high schools| Measure | This school | In Oregon |
|---|---|---|
| State test proficiency ranked highest first | 23.1% | #134 of 177 |
| Math proficiency ranked highest first | 12.1% | #134 of 194 ▲ 8 |
| Reading proficiency ranked highest first | 32.5% | #147 of 201 ▼ 38 |
| Enrollment ranked largest first | 709 | #92 of 257 |
| Students per teacher ranked fewest first | 17.8:1 | #59 of 171 |
| Diversity index ranked most diverse first | 46.1% | #93 of 171 |
| Free and reduced lunch ranked highest share first | 100% | #16 of 207 |
| Enrollment change since 2017-18 ranked fastest growth first | +11.7% | #25 of 67 |
Ranked against other public high schools. Online schools are left out of every list, and test-score lists leave out schools that serve specialized populations. Each rank links to the full list. Arrows under a test-score rank show places moved since the prior test year, among schools tested both years.
4-year change
SY 2020-21 vs SY 2024-25Enrollment
709
+23 (+3%) vs 2020
-7% since 1990-91, when it was 761
Student : Teacher
17.8:1
was 17.6:1
Source: NCES Common Core of Data
Enrollment and staffing by year
| School year | Students | Teachers (FTE) | Students per teacher | Free and reduced lunch |
|---|---|---|---|---|
| 2024-25 | 709 | 39.9 | 17.8:1 | 100% (709) |
| 2023-24 | 691 | 43.9 | 15.7:1 | N/A |
| 2022-23 | 656 | 38.9 | 16.9:1 | N/A |
| 2020-21 | 686 | 39 | 17.6:1 | N/A |
| 2017-18 | 635 | 37.8 | 16.8:1 | 74% (467) |
| 2015-16 | 693 | 37 | 18.7:1 | 74% (510) |
| 2010-11 | 787 | 38 | 20.7:1 | 63% (496) |
| 2000-01 | 778 | 45 | 17.3:1 | 32% (246) |
| 1990-91 | 761 | 47 | 16.2:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for Ontario High School.
Since 2017-18: students up 12% (635 to 709); teachers up 6% (37.8 to 39.9).
About Ontario High School
Ontario High School is a mid-sized high school in Ontario, Oregon. It has an enrollment of 709 students in grades 9 through 12.
Ontario SD 8C counts 7 schools and 2,406 students, including Ontario High School.
More than half of enrollment at Ontario High School is Hispanic: 68%. Other groups include 27% White and 4% multiracial. The county population is about 34% Hispanic. The diversity index for Ontario High School is 46%. For US public schools as a whole it is 70%.
Ontario High School has 39.9 full-time-equivalent teachers, for a student-to-teacher ratio of about 17.8:1. High schools in Oregon average 19.8:1, 2.1 more students per teacher than here. A common income measure, free or reduced-price lunch eligibility, is 100% at Ontario High School. Public schools in Malheur County average 89%.
Ontario High School earns a C+ on the allk12 Grade, which blends test scores, results against poverty-based expectations, and the three-year trend. It scored higher than 42% of Oregon public high schools.
Based on student poverty, the model expects 23.8% at Ontario High School; the school's average proficiency rate across its state test results is 23.1%.
The county, Malheur County, is where the school is located. Median household income comes to about $54,519, about 15% of adults have at least a bachelor's degree, and the poverty rate is about 15%. The county's public schools total 25, with about 6,566 students.
Aiken Elementary School sits about 0.3 miles from Ontario High School. There are at least 8 other public schools within five miles. On state test proficiency, Ontario High School ranks 5th in a group of 5 nearby schools.
The school's setting, by NCES definition, is Town: Distant: in a town some distance from an urbanized area.
The school grew from 686 students in 2020-21 to 709 in 2024-25.
Use the discussion section to ask about homework, tutoring, and testing dates at Ontario High School. Current and former families are welcome to add their experience.
Malheur County at a glance
View full county profilePopulation
31,954
Census ACS
Median income
$54,519
Household, ACS
Bachelor's+
15%
Adults 25+
Poverty rate
15%
Below federal line
Schools in county
25
6,566 students
Quick facts
Related schools
Other schools in Ontario SD 8C
- Ontario Middle SchoolMiddle · 471 students
- Alameda Intermediate SchoolElementary · 355 students
- Aiken Elementary SchoolElementary · 333 students
- May Roberts Primary SchoolElementary · 302 students
- Cairo Elementary SchoolElementary · 124 students
- Pioneer Elementary SchoolElementary · 112 students
Other schools in Ontario
- Ontario Middle SchoolMiddle · 471 students
- Four Rivers Community SchoolCombined · 367 students
- Alameda Intermediate SchoolElementary · 355 students
- Aiken Elementary SchoolElementary · 333 students
- May Roberts Primary SchoolElementary · 302 students
- Annex Charter SchoolCombined · 131 students
Other Ontario High schools
2 other US public schools in 3 states are named Ontario High. Ontario High School is the 2nd largest of the 3.
- Ontario HighOntario, CA · 1,994 students
- Ontario High SchoolMansfield, OH · 540 students
Nearby schools
- Aiken Elementary School0.3 mi · 333
- May Roberts Primary School0.4 mi · 302
- Ontario Middle School0.5 mi · 471
- Alameda Intermediate School0.9 mi · 355
- Four Rivers Community School1.0 mi · 367
- TREASURE VALLEY CLASSICAL ACADEMY3.2 mi · 589
Frequently asked questions
About Ontario High SchoolHow many students attend Ontario High School?
Ontario High School enrolls approximately 709 students in grades 09-12.
Is Ontario High School an elementary, middle, or high school?
Ontario High School is a high school covering grades 09-12.
How many students per teacher at Ontario High School?
Approximately 17.8:1 students per teacher at Ontario High School.
How diverse is Ontario High School?
Ontario High School reports a student body of 27% White, 68% Hispanic, 0% Black, 0% Asian, 4% Two or more.
Who oversees Ontario High School?
Ontario High School is overseen by Ontario SD 8C in Malheur County.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.