Average
#3862 of 9,539 schools in CA
Top 41% in state
Colony High
High School · Chaffey Joint Union High
3850 East Riverside Dr., Ontario, CA 91761
Enrollment
2,085
Student-Teacher
24:1
Score
6.8
Grades
9th – 12th
Enrollment
2,085
Student-Teacher
24:1
Score
6.8
Grades
9th – 12th
Data vintage
2022-23
Data vintage2022-23
How this school compares
California schools
#3,862 of 9,539
In Ontario
#19 of 37
public schools
In district
#8 of 10
Chaffey Joint Union High
Academic growth
8.4 / 10
Excellent
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Colony High
High School in Ontario · grades 9th – 12th. Start here, then compare fit against nearby and district options.
Creek View Elementary
0.5 mi away. Use as a geographic alternative in the same move search.
Grace Yokley Junior High
0.9 mi away. Use as a geographic alternative in the same move search.
About Colony High
Colony High is a public high school in Ontario, CA, part of Chaffey Joint Union High. Colony High serves approximately 2,085 students, and covers grades 9th-12th, and has a 24:1 student-teacher ratio. Colony High has a current MySchoolScout rating of 6.8 out of 10 and ranks #3,862 of 9,539 schools in CA.
Structured state assessment records for Colony High show 38% math proficiency (multi-year average, 2009-2024) and 58% reading/ELA proficiency (multi-year average, 2009-2024).
- This school 6.8 · Average
- District avg 7.1
- CA avg 6.5
What Parents Should Know
Colony High is a large school: 2,085 students. Size usually brings more course choices and activities than a smaller school can staff, but kids can also blend into the crowd. Ask how the school keeps students known and supported.
Colony High runs 24:1 students to teachers, above the national average. That often means bigger classes. Ask how the school supports kids who need extra help, and whether there are teaching assistants or small-group time.
Score Breakdown
Full Profile · 4/4 metricsView breakdown
View breakdown
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Colony High — Students at Colony High score 39% proficient, which is above what's typical for similar communities (expected: 34%).
Equity & Diversity
Shown separately, not included in overall scoreFree/Reduced Lunch
72.2%
Students qualifying for federal meal assistance
Test Scores CA CAASPP (2023-24)
Based on 30 test records from CA state assessments. About our data
Proficiency Trend
→ StableAverage proficiency (% at or above grade level) across Math & ELA over time.
* COVID-affected year — test participation was uneven nationwide. This data is weighted at 50% in the Growth score calculation.
Source: EdFacts (NCES) and state assessment data. Growth score: 8.4/10.
How Colony High Compares
See how Colony High performs across key quality dimensions compared to state benchmarks.
Funding & Resources
Programs & Offerings
Data as of 2021-22 · Source: CRDC via Urban Institute · Learn more
Location
3850 East Riverside Dr., Ontario, CA 91761
Nearby Alternatives
Families considering Colony High may also want to explore other high schools in the area. Grace Yokley Junior High (rated 8.0/10, 0.9 miles away), which scores notably higher. Another option is Dr. Augustine Ramirez Intermediate (rated 7.5/10, 3.8 miles away, in nearby Eastvale), which scores slightly higher. Additionally, Eastvale Elementary (rated 7.0/10, 3.9 miles away, in nearby Eastvale), with a very similar rating. For more schools in Ontario, see our Ontario schools guide .
Nearby Schools
20 within 3.8 mi| School | Distance | Rating |
|---|---|---|
| Creek View Elementary Ontario | 0.5 mi | 4.2 |
| Grace Yokley Junior High Ontario | 0.9 mi | 8.0 |
| Ranch View Elementary Ontario | 1.2 mi | 6.7 |
| Mountain View Elementary Ontario | 1.5 mi | 3.5 |
| MONTECITO BAPTIST SCHOOL Ontario | 1.8 mi | 4.7 |
| Montecito Baptist School Ontario | 1.8 mi | — |
| Port View Preparatory - Ontario Ontario | 2.2 mi | — |
| Del Sol Academy Jurupa Valley | 2.2 mi | 4.0 |
| Park View Elementary Ontario | 2.4 mi | 6.4 |
| Harada Elementary Eastvale | 3.1 mi | 6.3 |
| Sky Country Elementary Jurupa Valley | 3.0 mi | 4.7 |
| Jurupa Valley High Jurupa Valley | 2.9 mi | 6.3 |
| Nathanael Homeschool Academy Corona | 3.3 mi | — |
| Aquinas International Academy Ontario | 3.4 mi | — |
| Rosa Parks Elementary Corona | 3.7 mi | 6.3 |
| Dr. Augustine Ramirez Intermediate Eastvale | 3.8 mi | 7.5 |
| Mantellum Matris Academy Eastvale | 3.9 mi | — |
| Levi H. Dickey Elementary Chino | 3.3 mi | 4.7 |
| Eastvale Elementary Eastvale | 3.9 mi | 7.0 |
| Louis VanderMolen Fundamental Elementary Jurupa Valley | 3.8 mi | 5.9 |
Neighborhood Census ACS (2019-2023)
Census data for ZIP 91761 (ACS 2019-2023 5-Year Estimates) · Data sources
Median Income
$97,396
Median Home Value
$590,000
Median Rent
$2,015/mo
Population
62,506
College Educated
21.4%
Homeownership
67.5%
Avg Commute
31.8 min
Poverty Rate
8.6%
Median Age
33.4
Similar Schools
Schools in the same state with comparable level, size, and ratings
| School | Rating |
|---|---|
| Artesia High Lakewood, CA | 6.8 |
| Bell Gardens High Bell Gardens, CA | 6.8 |
| Burroughs High Burbank, CA | 6.8 |
| Canoga Park Senior High Canoga Park, CA | 6.8 |
| Compton High Compton, CA | 6.8 |
| Franklin High Elk Grove, CA | 6.8 |
Frequently Asked Questions
Common questions about Colony High
What grades does Colony High serve?
Colony High serves students in grades 9th through 12th.
How many students attend Colony High?
Colony High has an enrollment of approximately 2,085 students.
What is the student-teacher ratio at Colony High?
The student-teacher ratio at Colony High is 24:1. A lower ratio generally means more individual attention per student. The national average is approximately 16:1 for public schools.
How does Colony High rank in CA?
Colony High ranks #3,862 of 9,539 schools in CA.
What is Colony High's MySchoolScout rating?
Colony High has a current MySchoolScout rating of 6.8 out of 10. This score combines the level-appropriate components shown in the rating breakdown; equity data is shown separately for context.
What are the test scores at Colony High?
Based on loaded state assessment records, Colony High has 38% math proficiency (multi-year average, 2009-2024) and 58% reading/ELA proficiency (multi-year average, 2009-2024).
Is Colony High a charter school?
No, Colony High is not a charter school. It is a traditional public school operated by the local school district.
Is Colony High a Title I school?
No, Colony High is not currently a Title I school.
What does the Free & Reduced Lunch percentage mean for Colony High?
72.2% of students at Colony High qualify for free or reduced-price lunch. This is a commonly used indicator of economic need and provides important context when interpreting test scores.
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Neighborhood Context
Powered by 
Quick Facts NCES CCD (SY 2022-23)
- Grades
- 9th – 12th
- Enrollment
- 2,085
- Student-Teacher Ratio
- 24:1
- Teachers (FTE)
- 87
- Free/Reduced Lunch
- 72.2%
- Type
- regular
- Setting
- Midsize City
- County
- San Bernardino County
- Chronic Absenteeism (SY 2022-23)
- 21.5%
- Phone
- (909) 930-2929
- 4-Year Graduation
- 87.0%
Resources & Links
District
Chaffey Joint Union High- District Enrollment
- 22,628
- Schools in District
- 11
- Per-Pupil Spending
- $16,769
- District Rank
- #8 of 10
Other Schools in This District
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