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).
Recent Articles
Esports Programs in Public Schools: Benefits & Funding
Explore how esports programs in public schools support academic achievement, boost student engagement, and operate through sustainable funding models and partnerships.
Apprenticeship Pathways in High School: Alternatives to College
Explore apprenticeship pathways in high school as practical alternatives to traditional college routes, including benefits, programs, and career outcomes.
FAFSA Changes and High School College Counseling
Explore how recent FAFSA changes are reshaping high school college counseling, financial aid planning, and what families should expect in the 2026 application cycle.