Colony High
🇺🇸 Official data · 2025Ontario, California 91761 · Chaffey Joint Union High
#612 of 1,343 high schools in California
#11263 of 16,910 nationally
About Colony High
Colony High is a public high located in Ontario, in the Chaffey Joint Union High school district of California, United States. It caters for Grades 9–12. In 2025 it enrolled 2,109 students. Traditional public schools run by a school district; free to attend.
Its Success Index (US) is 38.7 out of 100, placing it in the lower 50% of high schools in United States and 612th of 1,343 ranked high schools in California. Its strongest component is reading proficiency (59th percentile), and its weakest is students per teacher (3th percentile).
Other published figures: enrollment 2,109.
There are 34 schools in Ontario; Colony High ranks 7th of 34 scored schools there.
Success Index (US) breakdown
Each component is a percentile against high schools across United States.
- Math proficiency (30%)35%
- Reading proficiency (30%)60%
- Community advantage (fewer free/reduced-price lunch) (25%)69.7%
- Students per teacher (15%)26.0
The Success Index (US) summarises published data about a school community. It is not a measure of teaching quality. Read the methodology.
Published measures
All figures published for Colony High by the official sources.
- Enrollment
- 2,109
- Students enrolled in the latest NCES directory year.
- Free/reduced-price lunch
- 69.7%
- Share of students eligible for free or reduced-price lunch.
- Students per teacher
- 26.0
- Enrollment divided by FTE teachers; not class size.
- Reading proficiency
- 60%
- Share of tested students proficient or above (all students, all grades).
- Math proficiency
- 35%
- Share of tested students proficient or above (all students, all grades).
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Schools near Colony High
Closest schools by straight-line distance, with their Success Index (US).
Creek View Elementary
Ontario · Public elementary · Grades K–6
566 students · 878 m away
Grace Yokley Junior High
Ontario · Public middle · Grades 7–8
606 students · 1.5 km away
Ranch View Elementary
Ontario · Public elementary · Grades K–6
738 students · 2.0 km away
Mountain View Elementary
Ontario · Public elementary · Grades K–6
564 students · 2.4 km away
Del Sol Academy
Jurupa Valley · Public elementary · Grades K–8
1,213 students · 3.6 km away
Park View Elementary
Ontario · Public elementary · Grades K–6
844 students · 3.9 km away
Jurupa Valley High
Jurupa Valley · Public high · Grades 9–12
1,693 students · 4.6 km away
Sky Country Elementary
Jurupa Valley · Public elementary · Grades K–6
525 students · 4.9 km away
Harada Elementary
Eastvale · Public elementary · Grades K–6
1,056 students · 5.0 km away
Levi H. Dickey Elementary
Ontario · Public elementary · Grades K–6
413 students · 5.2 km away
Similar schools
Public high schools in California with a comparable Enrollment.
Cosumnes Oaks High
Elk Grove · Public high · Grades 9–12
2,109 students
Citrus Valley High
Redlands · Public high · Grades 9–12
2,110 students
Angelo Rodriguez High
Fairfield · Public high · Grades 9–12
2,111 students
South High
Bakersfield · Public high · Grades 9–12
2,107 students
Corona del Mar High
Newport Beach · Public high · Grades 7–12
2,106 students
North Salinas High
Salinas · Public high · Grades 9–12
2,106 students
Frequently asked questions
Is Colony High a good school?
Colony High has a Success Index (US) of 38.7 out of 100 (Lower 50% of high schools in United States) and ranks #612 of 1,343 in California. The index summarises published data about the school community and, where available, attainment; it does not measure teaching quality, so visit the school and ask about support at your child's level.
Where does Colony High rank in California?
Colony High ranks #612 of 1,343 high schools in California and #11263 of 16,910 nationally on the Success Index (US) (2025 data).
How many students attend Colony High?
Colony High had 2,109 students in 2025.
Is Colony High a elementary school or a high school?
Colony High is classified as a high covering Grades 9–12. It is a public school.
What other schools are near Colony High?
There are 10 schools within 15 km of Colony High; they are listed on this page with their Success Index (US) and distance, and can be compared side by side.