The brief
A Walnut Valley Unified high school where students score 9 points above what's typical for similar communities.
It ranks 2,764 of 9,557 schools in California and 6 of 15 in Walnut Valley Unified.
Diamond Bar High is listed in Walnut Valley Unified, and a district label does not verify attendance for an address: confirm the zoned campus with the district before you commit to a street.
- 202572%
- 202472%
- 2022–2023: no results on file
- 2021*78%
- 2020*78%
- 201977%
- 201877%
* A COVID-affected year: test participation was uneven nationwide, so the model weights it at half.
About this school's data1 correction under review · rating: low confidence · 7 sources, 2019–2025
Every number on this page comes from a published source with a stated period. Where a source is partial, aging, an estimate, or describes a surrounding area rather than the school, that limitation is named here.
Attendance data is under correction. This existing Resources & Environment score and overall rating may still reflect an unverified attendance input.
Full Profile · 4/4 metrics
Multi-year averages used by the rating model: math 76% (multi-year average, 2009-2025) · reading/ELA 79% (multi-year average, 2009-2025).
- 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 · 2025 CAASPP · Medium confidence
- Available for part of the eligible units; results may not represent the full area.
- Source period: 2025 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 · 2025 CAASPP · Medium confidence
- Available for part of the eligible units; results may not represent the full area.
- Source period: 2025 CAASPP. A newer release may be available.
- Derived from source records rather than read directly from one field.
- Student progress (growth)
- State assessments · 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 91765; 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, 2009-2025; directory SY 2023–24
The neighborhood
Where it sits, and what the area looks like.Open the Los Angeles school map to see school quality against home prices across the metro.
The area
- Median income
- $104,737
- Median home value
- $878,900
- Median rent
- $2,395/mo
- College educated
- 53.3%
- Homeownership
- 77.2%
- Poverty rate
- 10.1%
U.S. Census ACS 5-year estimates · ACS 2019–2023 5-year estimates for the ZCTA associated with school ZIP 91765; this is area context, not an attendance boundary.
Getting around
- Walk Score
- 39
- Car-Dependent
- Bike Score
- 16
- Somewhat Bikeable
- City reported crime
- 1,759/100K
- Reported Part-1 offenses (violent + property + arson) per 100,000 residents, from the FBI Uniform Crime Reporting program for Diamond Bar. This is a city-level reported-crime measure, not a school safety rating.
Walk, transit and bike scores by
FBI Uniform Crime Reporting · 2025 · city context (Diamond Bar), not school-level safety or attendance eligibility. Source details
Source period: 2025. Freshness not available.
Programs and who goes here
What the campus offers, and who it enrolls.Programs
- AP and IB
- 3 AP courses · IB Programme
- 46.9% participation · state average 2.6 AP courses · 66 IB enrolled · CRDC via Urban Institute · SY 2021–22
- Athletics
- 20 sports
- 10 boys' · 10 girls' · 45 teams (incl. JV) · CRDC via Urban Institute · SY 2021–22
- Advanced STEM courses
- 5 of 5
- Algebra II, Advanced Math, Calculus, Chemistry, Physics · CRDC via Urban Institute · SY 2021–22
- Gifted and talented
- Available
- A program for qualifying students · CRDC via Urban Institute · SY 2021–22
Who goes here
- Free or reduced lunch
- 23.2%
- Students qualifying for federal meal assistance. Shown separately, never in the score.
NCES Common Core of Data (CCD).
Compare nearby
Grade-compatible schools using the same rating model.- 8.1Compare →
- 7.9Compare →
- Diamond Bar High7.3
- 7.3Compare →
- 7.1Compare →
- 6.7Compare →
- 5.2Compare →
- 5.1Compare →
- 4.5Compare →
Distance is proximity only; it is not attendance eligibility.
Enrollment path unverified: Potential public school; its attendance or application path has not been classified.
The record
What is on file, and where each number came from.The public record
What's said publicly about Diamond Bar High
Synthesized from public, attributable sources. Updated April 2026.
Sources (1)
Questions families ask
What grades does Diamond Bar High serve?
Diamond Bar High serves students in grades 9th through 12th.
How many students attend Diamond Bar High?
Diamond Bar High has an enrollment of approximately 2,532 students.
What is the student-teacher ratio at Diamond Bar High?
The student-teacher ratio at Diamond Bar High is 25.6:1. A lower ratio generally means more individual attention per student. The national average is approximately 16:1 for public schools.
How does Diamond Bar High rank in CA?
Diamond Bar High ranks #2,764 of 9,557 schools in CA.
What is Diamond Bar High's MySchoolScout rating?
Diamond Bar High has a current MySchoolScout rating of 7.3 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 Diamond Bar High?
Based on loaded state assessment records, Diamond Bar High has 76% math proficiency (multi-year average, 2009-2025) and 79% reading/ELA proficiency (multi-year average, 2009-2025).
Is Diamond Bar High a charter school?
No, Diamond Bar High is not a charter school. It is a traditional public school operated by the local school district.
Is Diamond Bar High a Title I school?
No, Diamond Bar High is not currently a Title I school.
What does the Free & Reduced Lunch percentage mean for Diamond Bar High?
23.2% of students at Diamond Bar 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 facts
- Grades
- 9th – 12th
- Enrollment
- 2,532
- Student-teacher ratio
- 25.6:1
- Teachers (FTE)
- 99
- Type
- Regular
- Title I
- No
- Setting
- Large Suburb
- County
- Los Angeles County
- Phone
- (909) 594-1405
- 4-year graduation
- 97.0%
- Class of 2023
- Rank in district
- #6 of 15
- Schools in district
- 15
- District spending per student
- $13,971
- NCES F-33 · FY 2023 · This annual source is three years behind the current year.
- District child poverty rate
- 10.1%
- Census SAIPE · 2024
- Area population (ZIP 91765)
- 44,779
- Area average commute
- 34 min
- Area median age
- 45.7
NCES Common Core of Data (CCD) (SY 2023–24).
Sources and official links
Keep exploring
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Data from NCES Common Core of Data, California Dept. of Education, and U.S. Census ACS for the 2023–24 school year. Rankings computed by MySchoolScout. See all data sources.