Average
#3862 of 9,539 schools in CA
Top 41% in state
Colony High
High School · Chaffey Joint Union High · Ontario, CA
A Chaffey Joint Union High high school where students score 5 points above what's typical for similar communities.
3850 East Riverside Dr., Ontario, CA 91761
- Math 19% vs CA 32% (2024)
- Reading 58% vs CA 52% (2024)
- 87.0% 4-year graduation
Academics
Full Profile · 4/4 metricsView breakdown
View breakdown
View breakdown
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Students at Colony High score 39% proficient, which is above what's typical for similar communities (expected: 34%).
2024 CAASPP proficiency
Most recent published year. School vs. CA average.
Trend
↓ DecliningProficiency has fallen 9 points since 2019, to 39% in 2024, across a 16-year record (2009–2024).
Show all 14 years
Multi-year averages used by the rating model: math 38% (multi-year average, 2009-2024) · reading/ELA 58% (multi-year average, 2009-2024)
* COVID-affected year — test participation was uneven nationwide. This data is weighted at 50% in the Growth score calculation.
Based on 30 test records from CA state assessments and EdFacts (NCES).
Equity & diversity
Shown separately, not included in the overall scoreFree/reduced lunch
72.2%
Students qualifying for federal meal assistance
How we rate schools
A clear 1–10 score built from public data — growth, academics, and learning environment. No hidden criteria, no pay-to-play.
See how we rateThe neighborhood
Where Colony High sits, and what the surrounding area looks like.
Nearby same-level schools are colored by their score. Pins are locations, not attendance boundaries.
Getting around & local context
- Walk 24Car-Dependent
- Transit 26Some Transit
- Bike 31Somewhat Bikeable
- City Safety: High2,102/100K
Powered by
FBI Uniform Crime Reporting · 2024 · city context (Ontario), not school-level safety or attendance eligibility. Source details
Source period: 2024. Freshness not available.
Area profileU.S. Census ACS 5-year estimates (ACS 2019–2023 5-year estimates)
Median income
$97,396
Median home value
$590,000
Median rent
$2,015/mo
College educated
21.4%
Homeownership
67.5%
Poverty rate
8.6%
ACS 2019–2023 5-year estimates for the ZCTA associated with school ZIP 91761; this is area context, not an attendance boundary.
Programs & students
Programs & Offerings
Compare nearby
Nearby same-level schools
4 from a 5-mile search; district fallback available
| School | Score | Grades | Distance | Enrollment | Compare |
|---|---|---|---|---|---|
| Montecito Baptist SchoolPrivate · tuition | Not rated | K–12 | 1.8 mi | 96 | Compare → |
| Montecito Baptist SchoolPrivate · tuition | 4.7private | K–12 | 1.8 mi | 70 | Compare → |
| Port View Preparatory - OntarioPrivate · tuition | Not rated | K–12 | 2.2 mi | 71 | Compare → |
| Jurupa Valley HighEnrollment path unverified | 6.3 | 9–12 | 2.9 mi | 1,638 | Compare → |
Distance is proximity only; it is not attendance eligibility.
Private · tuition: Potential private option; tuition and admission requirements have not been verified.
Enrollment path unverified: Potential public school; its attendance or application path has not been classified.
Public and private scores come from different models and are shown side by side, not blended into one ranking.
Chaffey Joint Union High
- Schools in district
- 11
- Rank in district
- #8 of 10
- District spending per student
- $16,769NCES F-33 · FY 2023 · This annual source is three years behind the current year.
- District child poverty rate
- 12.1%Census SAIPE · 2024
Colony High is listed in Chaffey Joint Union High; a district label does not verify attendance for an address.
About Colony High
Colony High is a public high school in Ontario, CA, part of Chaffey Joint Union High, serving approximately 2,085 students in grades 9th-12th with a 24:1 student-teacher ratio. It holds a MySchoolScout rating of 6.8 out of 10 and ranks #3,862 of 9,539 schools in CA. State assessment records show 38% math proficiency (multi-year average, 2009-2024) and 58% reading/ELA proficiency (multi-year average, 2009-2024).
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.
School factsNCES Common Core of Data (CCD) (SY 2023–24)
- Grades
- 9th – 12th
- Enrollment
- 2,085
- Student-Teacher Ratio
- 24:1
- Teachers (FTE)
- 87
- 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%
- Area population (ZIP 91761)
- 62,506
- Area average commute
- 31.8 min
- Area median age
- 33.4
Official sources & links
About this school's data
Every number on this page comes from a published source with a stated period. Where a source is partial, aging, or describes a surrounding area rather than the school, that limitation is named below.
- School directory (enrollment, grades, staff, contact)
- NCES Common Core of Data (CCD) · SY 2023–24 · Medium confidence
- Source period: SY 2023–24. A newer release may be available.
- MySchoolScout rating and rank
- MySchoolScout ranking model · Low confidence
- Vintage not available. Do not use this measure alone.
- Derived as a weighted blend of the component scores shown in Academics from state assessment, EdFacts growth, and NCES resource records.
- Math proficiency
- State department of education · 2024 CAASPP · Medium confidence
- Available for part of the eligible units; results may not represent the full area.
- Source period: 2024 CAASPP. A newer release may be available.
- Derived from source records rather than read directly from one field.
- Reading/ELA proficiency
- State department of education · 2024 CAASPP · Medium confidence
- Available for part of the eligible units; results may not represent the full area.
- Source period: 2024 CAASPP. A newer release may be available.
- Derived from source records rather than read directly from one field.
- Student progress (growth)
- NCES EdFacts · Mixed source periods · Low confidence
- Vintage not available. Do not use this measure alone.
- Available for part of the eligible units; results may not represent the full area.
- Derived as the fitted year-over-year slope of proficiency from multi-year assessment records.
- Neighborhood (income, housing, education)
- U.S. Census ACS 5-year estimates · ACS 2019–2023 5-year estimates · Low confidence
- Older source: ACS 2019–2023 5-year estimates. Use as historical context.
- Reported for the ZCTA for ZIP 91761; this does not measure the attendance area.
- Programs (AP/IB, athletics, gifted)
- CRDC via Urban Institute · SY 2021–22 · Medium confidence
- Available for part of the eligible units; results may not represent the full area.
- Source period: SY 2021–22. A newer release may be available.
Evidence periods: Rating mixed/unknown input periods; assessments multi-year average, 2009-2024; directory SY 2023–24
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