Serving 1,542 students in grades 9-12, Diamond Ranch High School ranks in the top 50% of all schools in California for overall test scores (math proficiency is bottom 50%, and reading proficiency is bottom 50%).
The percentage of students achieving proficiency in math is 23% (which is lower than the California state average of 34%). The percentage of students achieving proficiency in reading/language arts is 65% (which is higher than the California state average of 47%).
The student-teacher ratio of 23:1 is higher than the California state level of 21:1.
Minority enrollment is 97% of the student body (majority Hispanic), which is higher than the California state average of 80% (majority Hispanic).
Quick Facts (26-27)
- Grades: 9-12
- Enrollment: 1,542 students
- Student-Teacher Ratio: 23:1
- Minority Enrollment: 97%
- Graduation Rate: 97% (Top 5% in CA)
- Overall Testing Rank: Top 50%
- Math Proficiency: 23% (Btm 50%)
- Reading Proficiency: 65% (Top 20%)
- Science Proficiency: 32% (Top 50%)
- Attendance Zone: Diamond Ranch High serves the southwest part of Pomona, CA, covering an area of approximately 9.9 square miles. Most students live within 2 miles of the school, with typical drive times ranging from 5 to 10 minutes, while the furthest edge of the attendance zone extends up to 4 miles away.
- Source: National Center for Education Statistics (NCES), CA Dept. of Education
Top Rankings
Diamond Ranch High School ranks among the top 20% of public schools in California for:
Category
Attribute
Reading/Language Arts Proficiency
Graduation Rate
School Overview
Diamond Ranch High School's student population of 1,542 students has stayed relatively flat over five school years.
The teacher population of 68 teachers has stayed relatively flat over five school years.
Grades Offered
Grades 9-12
Total Students
1,542 students
Showing 2015–2025. View full 28-year historical data
Total Classroom Teachers
68 teachers
Showing 2014–2025. View full 28-year historical data
Year Founded
1997
School Rankings
Diamond Ranch High School ranks within the top 50% of all 9,523 schools in California (based off of combined math and reading proficiency testing data).
The diversity score of Diamond Ranch High School is 0.38, 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.
Overall Testing Rank
#3610 out of 9523 schools
(Top 50%)
(Top 50%)
Showing 2012–2023. View full 14-year historical data
Math Test Scores (% Proficient)
23%
34%
Showing 2012–2023. View full 14-year historical data
Reading/Language Arts Test Scores (% Proficient)
65%
47%
Showing 2011–2022. View full 13-year historical data
Science Test Scores (% Proficient)
32%
29%
Student-Teacher Ratio
23:1
21:1
Showing 2014–2025. View full 28-year historical data
Asian
10%
12%
Showing 2015–2025. View full 28-year historical data
Hispanic
78%
56%
Showing 2015–2025. View full 28-year historical data
Black
5%
5%
Showing 2015–2025. View full 28-year historical data
White
3%
20%
Showing 2015–2025. View full 28-year historical data
Hawaiian
1%
n/a
Two or more races
3%
6%
Showing 2015–2025. View full 17-year historical data
All Ethnic Groups
Showing 2015–2025. View full 28-year historical data
Graduation Rate
97%
86.2%
Showing 2014–2023. View full 13-year historical data
Chronically Absent Students
(22-23)25.4%
27.7%
Eligible for Free Lunch
60%
54%
Showing 2015–2025. View full 28-year historical data
Eligible for Reduced Lunch
18%
8%
Showing 2015–2025. View full 27-year historical data
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), CA Dept. of Education
Frequently Asked Questions
What is Diamond Ranch High School's ranking?
Diamond Ranch High School is ranked #3610 out of 9,523 schools, which ranks it among the top 50% of public schools in California.
What schools are Diamond Ranch High School often compared to?
Diamond Ranch High Schoolis often viewed alongside schools like Diamond Bar High School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
23% of students have achieved math proficiency (compared to the 34% CA state average), while 65% of students have achieved reading proficiency (compared to the 47% CA state average).
What is the graduation rate of Diamond Ranch High School?
The graduation rate of Diamond Ranch High School is 97%, which is higher than the California state average of 86.2%.
How many students attend Diamond Ranch High School?
1,542 students attend Diamond Ranch High School.
What is the racial composition of the student body?
78% of Diamond Ranch High School students are Hispanic, 10% of students are Asian, 5% of students are Black, 3% of students are White, 3% of students are Two or more races, and 1% of students are Hawaiian.
What is the student-teacher ratio of Diamond Ranch High School?
Diamond Ranch High School has a student ration of 23:1, which is higher than the California state average of 21:1.
What grades does Diamond Ranch High School offer ?
Diamond Ranch High School offers enrollment in grades 9-12
What school district is Diamond Ranch High School part of?
Diamond Ranch High School is part of Pomona Unified School District.
School Reviews
2 10/10/2025
As a former teacher of Diamond Ranch High School, I must say that unless your child attends the honor and/or AP classes offered at this school, he or she will get very little out of this school due to mismanagement by the administration and the misappropriation of funding.
5 10/10/2025
One of the best high schools in the Pomona Unified District. A very high, rigorous, and challenging academics and athletic programs. Their is a strong Music Department and a variety of after-school programs and clubs. Their is tutoring all the time with the teachers and clubs that offer tutoring.
2 10/10/2025
I currently attend this school. It has a strong set of teachers in the Spanish and English departments. As for the rest of the subjects, I feel as though it comes down to the student''s motivation to want to learn. Even in my current Honors class, there are people that just seem to have no motivation to even attempt their work. It all comes down to this one saying, You can lead a horse to water but, you can''t make it drink. I have an older sibling who attended Garey High School and managed to get into one of the top UCs out there. If you want to learn it comes down to your own willingness to learn. As long as you have the motivation and help from teachers and/ or tutors you should be fine. :) We are currently in the middle of a pandemic but I feel as though this school year hasn''t been the worst. Hopefully, I can enjoy senior year in person and be able to give this school a higher rating. I have one last comment: DO TUTORING IF YOU NEED THE HELP OR ASK YOUR TEACHER TO HELP EXPLAIN IT!!!!!!!!!!!!!!!!!!!!! Don''t be afraid to ask for help. :D (I am also in the VAPA program through art at the moment and it''s been good so far. Sometimes Mr. Crockett gets a little off-topic though lol. )
Review Diamond Ranch High School. Reviews should be a few sentences in length. Please include any comments on:
- Quality of academic programs, teachers, and facilities
- Availability of music, art, sports and other extracurricular activities
Recent Articles
Is Your Child's School Day Too Structured?
Discover where free time disappears during your child's school day, how to evaluate lunch, recess, and classroom schedules, and what parents can do when breaks become structured activities.
When Your Child's Best Friend Is in Another Class
Discover how to help your child when their best friend is assigned to another classroom, including school placement policies, maintaining friendships, building connections, and knowing when to request help.
Should Your Child Repeat a Grade or Move Ahead?
Before agreeing to grade retention, learn what evidence to request, how to review school policies, explore alternatives, understand parental rights, and secure an effective academic support plan for your child.
