Best Diamond Bar Public Middle Schools (2026)

For the 2026 school year, there are 2 public middle schools serving 2,037 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 96% of the student body (majority Asian), which is more than the California public middle school average of 78% (majority Hispanic).