Diamond Bar High
🇺🇸 Official data · 2025Diamond Bar, California 91765 · Walnut Valley Unified
#61 of 1,343 high schools in California
#2274 of 16,910 nationally
About Diamond Bar High
Diamond Bar High is a public high located in Diamond Bar, in the Walnut Valley Unified school district of California, United States. It caters for Grades 9–12. In 2025 it enrolled 2,563 students. Traditional public schools run by a school district; free to attend.
Its Success Index (US) is 74.3 out of 100, placing it in the top 25% of high schools in United States and 61st of 1,343 ranked high schools in California. Its strongest component is community advantage (fewer free/reduced-price lunch) (89th percentile), and its weakest is students per teacher (3th percentile).
Other published figures: enrollment 2,563.
There are 10 schools in Diamond Bar; Diamond Bar High ranks 5th of 10 scored schools there.
Success Index (US) breakdown
Each component is a percentile against high schools across United States.
- Math proficiency (30%)73%
- Reading proficiency (30%)80%
- Community advantage (fewer free/reduced-price lunch) (25%)22.6%
- Students per teacher (15%)26.2
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 Diamond Bar High by the official sources.
- Enrollment
- 2,563
- Students enrolled in the latest NCES directory year.
- Free/reduced-price lunch
- 22.6%
- Share of students eligible for free or reduced-price lunch.
- Students per teacher
- 26.2
- Enrollment divided by FTE teachers; not class size.
- Reading proficiency
- 80%
- Share of tested students proficient or above (all students, all grades).
- Math proficiency
- 73%
- Share of tested students proficient or above (all students, all grades).
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Schools near Diamond Bar High
Closest schools by straight-line distance, with their Success Index (US).
Evergreen Elementary
Diamond Bar · Public elementary · Grades K–5
709 students · 554 m away
Castle Rock Elementary
Diamond Bar · Public elementary · Grades K–5
684 students · 1.2 km away
South Pointe Middle
Walnut · Public middle · Grades 6–8
979 students · 1.4 km away
Maple Hill Elementary
Diamond Bar · Public elementary · Grades K–5
556 students · 2.0 km away
Chaparral Middle
Diamond Bar · Public middle · Grades 6–8
1,349 students · 2.4 km away
Walnut Elementary
Walnut · Public elementary · Grades K–5
706 students · 2.6 km away
Quail Summit Elementary
Diamond Bar · Public elementary · Grades K–5
696 students · 2.9 km away
Ybarra Academy for the Arts and Technology
Walnut · Public elementary · Grades K–8
630 students · 3.2 km away
Shelyn Elementary
Rowland Heights · Public elementary · Grades K–6
508 students · 3.4 km away
John A. Rowland High
Rowland Heights · Public high · Grades 9–12
2,016 students · 4.2 km away
Similar schools
Public high schools in California with a comparable Enrollment.
Aliso Niguel High
Aliso Viejo · Public high · Grades 9–12
2,563 students
Heritage High
Brentwood · Public high · Grades 9–12
2,566 students
Del Norte High
San Diego · Public high · Grades 9–12
2,557 students
C. K. McClatchy High
Sacramento · Public high · Grades 9–12
2,569 students
Eastlake High
Chula Vista · Public high · Grades 9–12
2,557 students
Lowell High
San Francisco · Public high · Grades 9–12
2,571 students
Frequently asked questions
Is Diamond Bar High a good school?
Diamond Bar High has a Success Index (US) of 74.3 out of 100 (Top 25% of high schools in United States) and ranks #61 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 Diamond Bar High rank in California?
Diamond Bar High ranks #61 of 1,343 high schools in California and #2274 of 16,910 nationally on the Success Index (US) (2025 data).
How many students attend Diamond Bar High?
Diamond Bar High had 2,563 students in 2025.
Is Diamond Bar High a elementary school or a high school?
Diamond Bar High is classified as a high covering Grades 9–12. It is a public school.
What other schools are near Diamond Bar High?
There are 10 schools within 15 km of Diamond Bar High; they are listed on this page with their Success Index (US) and distance, and can be compared side by side.