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Diamond Bar High
A+

Diamond Bar High

PublicHighGrades 9–12

21400 Pathfinder Rd., Diamond Bar, CA 91765 · (909) 594-1405 · Part of Walnut Valley Unified School District

Diamond Bar’s School Grade B+ better than 72% of California school districts

Photo: TheWikiChen · Public domain · Wikimedia Commons
Students
2,563
Students per teacher
26:1
Free or reduced lunch
23%
Setting
Suburb
Grades
9–12
The gist

What stands out about Diamond Bar High

  • Its own letter, A+: reading and math results near the top of California’s public schools
  • Math proficiency 43 pts above the state
  • Reading / language arts 30 pts above the state
  • Larger classes: 26 students per teacher

On the path

Where Diamond Bar kids come from and go next. The whole path →

6–83 middle schoolsDepends on your address
9–12Diamond Bar HighYou are here

Test scores

2020–21
Math proficiency77%
State average 33.6%
Reading / language arts79%
State average 48.6%

Its own letter, A+, places these results among California’s 3,615 public schools with results. Source: EDFacts via Urban Institute Education Data Portal (SY2020-21).

21400 Pathfinder Rd., Diamond Bar

Students

Enrollment by grade
Grade 9646
Grade 10626
Grade 11644
Grade 12647
Enrollment over time
2,544’20
2,534’21
2,557’22
2,532’23
2,563’24

About steady since 2020–21.

Who goes here
Asian 72%Hispanic 17%White 5%Two or more races 4%Black 1%Native Hawaiian/Pacific Islander <1%

As reported to NCES, share of students with a reported race or ethnicity.

Parents talk

Questions and answers about Diamond Bar High from Diamond Bar families.

Other schools in Walnut Valley Unified School District

The district →

School facts: U.S. Department of Education (NCES), 2024–2025 school year. Test scores: EDFacts via Urban Institute Education Data Portal (SY2020-21). A school’s letter is our own summary of its reading and math results against California’s other public schools; Diamond Bar’s School Grade is built from its districts’ results. Map: © OpenStreetMap contributors.