Serving 2,532 students in grades 9-12, Diamond Bar High School ranks in the top 10% of all schools in California for overall test scores (math proficiency is top 10%, and reading proficiency is top 10%).
The percentage of students achieving proficiency in math is 70% (which is higher than the California state average of 33%). The percentage of students achieving proficiency in reading/language arts is 78% (which is higher than the California state average of 47%).
The student:teacher ratio of 25:1 is higher than the California state level of 21:1.
Minority enrollment is 94% of the student body (majority Asian), which is higher than the California state average of 80% (majority Hispanic and Asian).
Quick Stats (2025)
Grades: 9-12
Enrollment: 2,532 students
Student:Teacher Ratio: 25:1
Minority Enrollment: 94%
Graduation Rate
: 98% (Top 5% in CA)
Overall Testing Rank
: Top 10%
Math Proficiency
: 70% (Top 10%)
Reading Proficiency
: 78% (Top 10%)
Science Proficiency
: 47% (Top 20%)
Source: National Center for Education Statistics (NCES), CA Dept. of Education
Diamond Bar High School ranks within the top 10% of all 9,602 schools in California (based off of combined math and reading proficiency testing data).
The diversity score of Diamond Bar High School is 0.48, which is less than the diversity score at state average of 0.63. The school's diversity has stayed relatively flat over five school years.
What percent of students have achieved state testing proficiency in math and reading?
70% of students have achieved math proficiency (compared to the 33% CA state average), while 78% of students have achieved reading proficiency (compared to the 47% CA state average).
What is the graduation rate of Diamond Bar High School?
The graduation rate of Diamond Bar High School is 98%, which is higher than the California state average of 87%.
How many students attend Diamond Bar High School?
2,532 students attend Diamond Bar High School.
What is the racial composition of the student body?
70% of Diamond Bar High School students are Asian, 18% of students are Hispanic, 6% of students are White, 4% of students are Two or more races, and 2% of students are Black.
What is the student:teacher ratio of Diamond Bar High School?
Diamond Bar High School has a student ration of 25:1, which is higher than the California state average of 21:1.
What grades does Diamond Bar High School offer ?
Diamond Bar High School offers enrollment in grades 9-12
What school district is Diamond Bar High School part of?
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Quick Stats (2025)
Grades: 9-12
Enrollment: 2,532 students
Student:Teacher Ratio: 25:1
Minority Enrollment: 94%
Graduation Rate
: 98% (Top 5%)
Overall Testing Rank
: Top 10%
Math Proficiency
: 70% (Top 10%)
Reading Proficiency
: 78% (Top 10%)
Science Proficiency
: 47% (Top 20%)
Source: National Center for Education Statistics (NCES), CA Dept. of Education
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