For the 2026 school year, there are 2 public middle schools serving 1,880 students in Diamond Bar, CA. The top-ranked public middle schools in Diamond Bar, CA are Chaparral Middle School and Lorbeer Middle School. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.
Diamond Bar, CA public middle schools have an average math proficiency score of 57% (versus the California public middle school average of 32%), and reading proficiency score of 70% (versus the 46% statewide average). Middle schools in Diamond Bar have an average ranking of 10/10, which is in the top 10% of California public middle schools.
Minority enrollment is 95% of the student body (majority Asian), which is more than the California public middle school average of 78% (majority Hispanic).
Best Public Middle Schools in Diamond Bar, CA (2026)
School
(Math and Reading Proficiency)
(Math and Reading Proficiency)
Location
Quick Facts
Rank: #11.
Chaparral Middle School
(Math: 74% | Reading: 80%)
Rank:
Rank:
10/
Top 5%10
1405 South Spruce Tree Dr.
Diamond Bar, CA 91765
(909) 861-6227
Diamond Bar, CA 91765
(909) 861-6227
Gr: 6-8 | 1,204 student Student-teacher ratio: 26:1 Minority enrollment: 95%
Rank: #22.
Lorbeer Middle School
(Math: 26% | Reading: 52%)
Rank:
Rank:
6/
Top 50%10
501 Diamond Bar Blvd.
Diamond Bar, CA 91765
(909) 397-4527
Diamond Bar, CA 91765
(909) 397-4527
Gr: 7-8 | 676 students Student-teacher ratio: 23:1 Minority enrollment: 96%
Frequently Asked Questions
What are the top-ranked public middle schools in Diamond Bar, CA?
The top-ranked public middle schools in Diamond Bar, CA include Chaparral Middle School and Lorbeer Middle School. Diamond Bar has one of the highest concentrations of top-ranked public schools in California.
How many public middle schools are located in Diamond Bar?
2 public middle schools are located in Diamond Bar.
What is the racial composition of students in Diamond Bar?
Diamond Bar public middle schools minority enrollment is 95% of the student body (majority Asian), which is more than the California public middle schools average of 78% (majority Hispanic).
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