A−
Colony High
PublicHighGrades 9–12Virtual
3850 East Riverside Dr., Ontario, CA 91761 · (909) 930-2929 · Part of Chaffey Joint Union High School District
Students
2,109
Students per teacher
26:1
Free or reduced lunch
70%
Setting
City
Grades
9–12
What stands out about Colony High
- School Grade A−: near the top of California’s public schools
- Math proficiency 8 pts above the state
- Reading / language arts 18 pts above the state
- Larger classes: 26:1 students per teacher
Test scores
EDFacts via Urban Institute Education Data Portal (SY2020-21) · 2020–21Math proficiency42%
State average 33.6%
Reading / language arts67%
State average 48.6%
Location
Directions ↗
3850 East Riverside Dr., Ontario
Students
Enrollment by grade
Grade 9507
Grade 10550
Grade 11517
Grade 12535
Enrollment over time
2,162’20
2,134’21
2,122’22
2,085’23
2,109’24
About steady.
Who goes here
Hispanic 66%Black 13%Asian 9%White 7%Two or more races 3%Native Hawaiian/Pacific Islander <1%American Indian/Alaska Native <1%
As reported to NCES, share of students with a reported race or ethnicity.
What neighbors say
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Parents talk
Conversations in Town Square that mention Colony High.
Other schools in Chaffey Joint Union High School District
School facts: U.S. Department of Education (NCES), 2024-2025 school year. Scores: EDFacts via Urban Institute Education Data Portal (SY2020-21). The School Grade is our own summary of state test results. Neighbor ratings are opinions, not an official measure of school quality.