PROFICIENCY 46% 19% higher than state average
School Rankings Proficiency Averages
51%Chaffey Joint Union High

Ontario High is a school servicing grades 9 to 12 and is located in the district of "Chaffey Joint Union High" in Ontario, CA. There are a total of 2,549 students and 102 teachers at Ontario High, for a student to teacher ratio of 25 to 1. There are a total of 1,660 free lunch students and 237 reduced lunch students.

Ontario High has an average proficiency test score (in mathematics and languages) of 45.5%, which is 19% higher than the California average.


Student/Teacher ratio25:1
Free lunch1660
Reduced lunch237


Advanced Placement
AP enrollment342
Taking some courses164
Taking some courses (not tests)192
Passing some courses63
Passing no courses99

Advanced placement (AP) is a program that offers high school students the ability to take college level courses and exams. These programs were created to be at the same level of most first year university courses. If the students were successful in the AP programs, they could potentially receive advanced placement, credit or exemptions when they go on to university. At Ontario High, there are a total of 342 students enrolled in advanced placement courses, with 164 taking some courses.

Proficiency in mathematics comparison

Proficiency in languages comparison

Proficiency in mathematics by grade

High School28%

Proficiency in languages by grade

High School63%

The proficiency in math and languages tables represent the percentage of students that scored at or above the proficiency level on their standardized state assessment tests. Although these tests are standardized within each state, the tests may vary from state to state. Comparing the results of one state to another may not always be an accurate or fair comparison.

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Ontario High race/ethnicity breakdown

Caucasian 4.0% 18.5% 24.1% 51.1%
African American 3.2% 8.4% 6.2% 15.9%
Asian 1.9% 6.6% 11.1% 4.7%
Hispanic or Latino 89.5% 63.3% 54.1% 23.6%
American Indian and Alaskan 0.4% 0.4% 0.7% 1.2%
Hawaiian 0.4% 0.5% 0.8% 0.4%
Multiracial 0.7% 2.3% 3.1% 3.1%

Other schools nearby

Richard Haynes Elementary29%0.2Ontario, CA
Vista Grande Elementary22%0.6Ontario, CA
Oaks Middle School27%1.0Ontario, CA
Euclid Elementary16%1.1Ontario, CA
Sultana Elementary20%1.1Ontario, CA
De Anza Middle School22%1.2Ontario, CA
Alicia Cortez Elementary30%1.3Chino, CA
Mission Elementary18%1.3Ontario, CA
Walnut Avenue Elementary22%1.4Chino, CA
Chino High44%1.6Chino, CA
E. J. Marshall Elementary36%1.7Chino, CA
Bon View Elementary13%1.7Ontario, CA

Ontario demographics profile

Population density (sq mi)3,39223291
Median age31.936.037.7
Male/Female ratio1.0:11.0:11.0:1
Married (15yrs & older)50%52%55%
Speak English41%56%79%
Speak Spanish53%29%13%

Education level achieved in Ontario

Completed 8th grade70.6%81.1%84.3%
Completed high school68.7%79.8%83.0%
Completed some college44.2%61.5%59.4%
Completed associate degree21.7%39.8%38.5%
Completed bachelors14.9%32.0%30.3%
Completed masters3.9%11.9%11.5%
Completed professional degree0.9%3.9%3.3%
Completed doctorate0.3%1.6%1.3%
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Reason for reporting
Source: The Ontario High data displayed above is derived from the 2016 National Center for Education Statistics and from the U.S. Department of Education.
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