Photo: Thebluewriter · CC BY-SA 4.0Diamond Bar’s public schools outscore 72% of California districts
On the state math tests, 39% of Diamond Bar’s students scored proficient, above the California average (33%). The grade covers the two public school districts serving Diamond Bar, from kindergarten through graduation, on state tests and graduation. Each state writes its own tests, so this is the one TownRatings grade compared within California, not nationally.
From California state tests taken in spring 2022, when 97% of students in the tested grades sat them, and the class of 2023’s four-year graduation rate, as reported to the U.S. Department of Education.
Diamond Bar’s schools, in brief
Above the state on tests
Reading proficiency is 51% and math 39% across both districts in spring 2022, against 47% and 33% statewide; 86% of the class of 2023 graduated in four years, against 86%. Test scores ↓
Spending and class size
Walnut Valley Unified spends $16,053 per student and Pomona Unified $23,577, against $21,206 across California (FY2024). Neither counts toward the grade. Districts ↓
Choice beyond the district
Mt. Calvary Lutheran School (private), Landmark Christian Preschool (private), Discovery World Montessori (private) and Diamond Bar Montessori Academy (private) are in town. Every school ↓
Written from the figures on this page. Tests are from 2021–22, graduation from the class of 2023; each school’s own letter uses 2020–21 results.
What’s behind Diamond Bar’s grade
B+: better than 72% of California school districts, #225 of 847 California towns. Test scores are above the California average; graduation is below it.
Where will my kid go?
Pick a grade. These are the public schools that serve Diamond Bar, with each school’s own grade.
7th grade in Diamond Bar · depends on your address
Chaparral Middle
Grades 6–8 · 1,349 students · 28:1 students per teacher
South Pointe Middle
Grades 6–8 · 979 students · 26:1 students per teacher · in Walnut
Lorbeer Middle
Grades 7–8 · 688 students · 24:1 students per teacher
8th grade in Diamond Bar · depends on your address
Chaparral Middle
Grades 6–8 · 1,349 students · 28:1 students per teacher
South Pointe Middle
Grades 6–8 · 979 students · 26:1 students per teacher · in Walnut
Lorbeer Middle
Grades 7–8 · 688 students · 24:1 students per teacher
9th grade in Diamond Bar · depends on your address
Diamond Bar High
Grades 9–12 · 2,563 students · 26:1 students per teacher
Diamond Ranch High
Grades 9–12 · 1,542 students · 23:1 students per teacher · in Pomona
10th grade in Diamond Bar · depends on your address
Diamond Bar High
Grades 9–12 · 2,563 students · 26:1 students per teacher
Diamond Ranch High
Grades 9–12 · 1,542 students · 23:1 students per teacher · in Pomona
11th grade in Diamond Bar · depends on your address
Diamond Bar High
Grades 9–12 · 2,563 students · 26:1 students per teacher
Diamond Ranch High
Grades 9–12 · 1,542 students · 23:1 students per teacher · in Pomona
12th grade in Diamond Bar · depends on your address
Diamond Bar High
Grades 9–12 · 2,563 students · 26:1 students per teacher
Diamond Ranch High
Grades 9–12 · 1,542 students · 23:1 students per teacher · in Pomona
Diamond Bar runs its own schools through grade 12 (Walnut Valley Unified School District). From grade K, students attend the Pomona Unified School District, shared with Pomona. To confirm the school for a specific address, ask the district.
Two districts serve Diamond Bar
Spending and class size are shown but don’t count toward the grade. Each district’s own page has every school.
Above the state in reading
Diamond Bar vs. its neighbors
Schools grades for the California towns that share Diamond Bar’s borders.
| Town | Schools | Main districts |
|---|---|---|
| Diamond Bar | B+ | Walnut Valley Unified K–12 · Pomona Unified K–12 |
| Industry | — | Hacienda La Puente Unified K–12 · Rowland Unified K–12 · Whittier Union High 9–12 |
| Pomona | C+ | Pomona Unified |
| Chino Hills | A− | Chino Valley Unified |
Every school in Diamond Bar
17 schools. Each public school’s letter compares its own 2020–21 reading and math results with California’s other public schools (the newest school-level results we have).
Questions about Diamond Bar’s schools
Are Diamond Bar’s schools good?
By California’s own tests, yes: the public schools Diamond Bar children attend outscore 72% of California’s school districts on tests and graduation, a B+ Schools grade, #225 of 847 California towns. Among towns with similar incomes they beat 75%. Tests are from 2021–22, graduation from the class of 2023.
What school district is Diamond Bar in?
Two districts: Walnut Valley Unified School District runs grades K–12, and Pomona Unified School District runs grades K–12, shared with Pomona.
Where do Diamond Bar kids go to high school?
One of 2 high schools, depending on your address: Diamond Bar High and Diamond Ranch High.
What is Diamond Bar’s graduation rate?
86% of the class of 2023 in Pomona Unified School District graduated in four years, against 86% across California.
How much does Diamond Bar spend per student?
$16,053 in Walnut Valley Unified School District and $23,577 in Pomona Unified School District (FY2024), against $21,206 across California. Spending doesn’t count toward the grade.
Are there private schools in Diamond Bar?
Yes: Mt. Calvary Lutheran School (religious, grades PK–8, 284 students), Landmark Christian Preschool (religious, grades PK–K, 60 students), Discovery World Montessori (nonsectarian, grades K, 10 students) and Diamond Bar Montessori Academy (nonsectarian, grades K, 7 students).
Parents talk
What Diamond Bar families are saying about school.
Looking for colleges? Colleges near Diamond Bar → They have their own page.
School data: state test results (2021–22, with participation) and four-year graduation rates (class of 2023) reported to the U.S. Department of Education (EDFacts via ED Data Express); each school’s own letter uses its 2020–21 results (EDFacts via the Urban Institute); schools and enrollment from NCES (2024–25; private schools 2023–24); spending from the Census Bureau’s school finance survey (FY2024). The School Grade is our own summary, graded within California. Stars are from neighbors.