Very Good
#3152 of 9,533 schools in CA
Top 33% in state
Diamond Ranch High
High School · Pomona Unified
100 Diamond Ranch Dr., Pomona, CA 91766
Enrollment
1,567
Student-Teacher
23:1
Score
7.1
Grades
9th – 12th
Enrollment
1,567
Student-Teacher
23:1
Score
7.1
Grades
9th – 12th
Updated
2022-23
Updated 2022-23
How this school compares
In Pomona
#6 of 34
public schools
California high schools
#582 of 1,892
In district
#7 of 36
Pomona Unified
Equity
8.5 / 10
Exceptional
About Diamond Ranch High
Diamond Ranch High serves 1,567 students in grades 9-12 in Pomona, California, operating as a regular public school with 68 full-time equivalent teachers and a student-teacher ratio of 23:1. The school ranks in the 68th percentile statewide, placing #3,109 out of 9,566 California high schools with a MySchoolScout rating of 6.7 out of 10. Academically, Diamond Ranch High shows particular strength in English Language Arts, with 66% of students performing at proficient or above levels across grade levels.
Mathematics presents an area with room for growth, as 26% of students currently achieve proficiency or above. The school's overall academic score stands at 7.0 out of 10, reflecting solid educational foundations with opportunities for continued improvement. The school draws from a diverse suburban community where the median household income is $72,692 and median home values reach $517,500.
In this ZIP code of nearly 70,000 residents, 18% hold bachelor's degrees or higher, with a poverty rate of 14.4%. Diamond Ranch High is situated in a large suburban setting that provides students with the resources and opportunities typical of established residential communities in Los Angeles County.
What Parents Should Know
The student-teacher ratio at Diamond Ranch High is 23:1, which is higher than the national average. This may mean larger class sizes, so parents should ask about classroom support, teaching assistants, and how the school differentiates instruction for students who need extra help.
Score Breakdown
Full Profile · 4/4 metricsView breakdown
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Diamond Ranch High — Students at Diamond Ranch High score 46% proficient, which is above what's typical for similar communities (expected: 30%).
Equity & Diversity
Shown separately, not included in overall scoreFree/Reduced Lunch
79.3%
Students qualifying for federal meal assistance
Test Scores CA CAASPP (2023-24)
Based on 6 test records from CA state assessments. About our data
Proficiency Trend
↓ DecliningAverage proficiency (% at or above grade level) across Math & ELA over time.
Source: EdFacts (NCES) and state assessment data. Growth score: 4.9/10.
How Diamond Ranch High Compares
See how Diamond Ranch High performs across key quality dimensions compared to state benchmarks.
Funding & Resources
Performance Trends
Math proficiency has declined from 36% (2019) to 25.59% (2024). Reading/ELA proficiency has declined from 71% (2019) to 65.97% (2024).
Location
100 Diamond Ranch Dr., Pomona, CA 91766
Nearby Alternatives
Families considering Diamond Ranch High may also want to explore other high schools in the area. Garey High (rated 6.5/10, 1.8 miles away), with a comparable rating. Additionally, Fremont Academy of Engineering and Design (rated 6.4/10, 1.8 miles away), with a comparable rating. For more schools in Pomona, see our Pomona schools guide .
Nearby Schools
20 within 2.0 mi| School | Distance | Rating |
|---|---|---|
| Ranch Hills Elementary Pomona | 1.0 mi | 5.3 |
| Decker Elementary Pomona | 1.1 mi | 6.8 |
| Pantera Elementary Diamond Bar | 1.0 mi | 8.8 |
| GUIDE ACADEMY Diamond Bar | 1.1 mi | 5.9 |
| Golden Springs Elementary Diamond Bar | 1.3 mi | 5.8 |
| Westmont Elementary Pomona | 1.9 mi | 5.3 |
| Lexington Elementary Pomona | 1.7 mi | 6.5 |
| Fremont Academy of Engineering and Design Pomona | 1.8 mi | 6.4 |
| Lorbeer Middle Diamond Bar | 1.7 mi | 5.8 |
| Garey High Pomona | 1.8 mi | 6.5 |
| Oak Crest Academy Independent Studies Pomona | 1.8 mi | — |
| Oak Crest Academy - Pomona Pomona | 1.8 mi | — |
| DIAMOND BAR MONTESSORI ACADEMY Diamond Bar | 1.8 mi | 5.3 |
| Vejar Elementary Pomona | 2.0 mi | 7.2 |
| MT CALVARY LUTHERAN SCHOOL Diamond Bar | 1.9 mi | 6.2 |
| VILLAGE MONTESSORI ACADEMY Diamond Bar | 1.9 mi | — |
| VILLAGE MONTESSORI ACADEMY Diamond Bar | 1.9 mi | — |
| LiMai Montessori Academy Diamond Bar | 1.9 mi | — |
| Mt Calvary Lutheran Diamond Bar | 1.9 mi | — |
| Eagle Canyon Elementary Chino | 2.0 mi | 8.2 |
Neighborhood Census ACS (2019-2023)
Census data for ZIP 91766 (ACS 2019-2023 5-Year Estimates) · Data sources
Median Income
$77,699
Median Home Value
$568,300
Median Rent
$1,776/mo
Population
68,673
College Educated
19.9%
Homeownership
53.4%
Avg Commute
31.2 min
Poverty Rate
12.8%
Median Age
34.9
Community Profile
The community surrounding Diamond Ranch High has a median household income of $77,699. It is a community where 20% of adults hold a bachelor's degree or higher. The median home value in the area is $568,300, with a median rent of $1,776/month. The area has a poverty rate of 12.8%. The average commute for residents is 31 minutes. Source: U.S. Census ACS 2022 5-Year Estimates.
Similar Schools
Schools in the same state with comparable level, size, and ratings
| School | Rating |
|---|---|
| Adolfo Camarillo High Camarillo, CA | 7.1 |
| Alliance Ouchi-O'Donovan 6-12 Complex Los Angeles, CA | 7.1 |
| Castle Park Senior High Chula Vista, CA | 7.1 |
| Charter Oak High Covina, CA | 7.1 |
| Desert Hot Springs High Desert Hot Springs, CA | 7.1 |
| Don Antonio Lugo High Chino, CA | 7.1 |
Frequently Asked Questions
Common questions about Diamond Ranch High
What grades does Diamond Ranch High serve?
Diamond Ranch High serves students in grades 9th through 12th.
How many students attend Diamond Ranch High?
Diamond Ranch High has an enrollment of approximately 1,567 students.
What is the student-teacher ratio at Diamond Ranch High?
The student-teacher ratio at Diamond Ranch High is 23:1. A lower ratio generally means more individual attention per student. The national average is approximately 16:1 for public schools.
How does Diamond Ranch High rank in CA?
Diamond Ranch High is ranked #3152 out of 9,533 schools in CA.
What is Diamond Ranch High's MySchoolScout rating?
Diamond Ranch High has a composite rating of 7.1 out of 10 on MySchoolScout. This score combines academic performance, student growth, and school environment into a single score. Equity data is shown separately for context.
What are the test scores at Diamond Ranch High?
Based on the most recent state assessment data, Diamond Ranch High has 29.1% math proficiency and 67.6% reading/ELA proficiency.
Is Diamond Ranch High a charter school?
No, Diamond Ranch High is not a charter school. It is a traditional public school operated by the local school district.
Is Diamond Ranch High a Title I school?
No, Diamond Ranch High is not currently a Title I school.
What does the Free & Reduced Lunch percentage mean for Diamond Ranch High?
79.3% of students at Diamond Ranch High qualify for free or reduced-price lunch. This is a commonly used indicator of economic need and provides important context when interpreting test scores.
Explore More Schools
Neighborhood Context
Powered by 
FBI UCR 2024. City-level (Pomona). Data >1 year old.
Quick Facts NCES CCD (SY 2022-23)
- Grades
- 9th – 12th
- Enrollment
- 1,567
- Student-Teacher Ratio
- 23:1
- Teachers (FTE)
- 68
- Free/Reduced Lunch
- 79.3%
- Type
- regular
- Setting
- Large Suburb
- County
- Los Angeles County
- Phone
- (909) 397-4715
- Data Year
- 2023–2024
Resources & Links
District
Pomona Unified- District Enrollment
- 20,966
- Schools in District
- 37
- Per-Pupil Spending
- $20,301
- District Rank
- #7 of 36
How We Rate Schools
Every school receives a composite score from 1 to 10 based on four pillars: Academic Performance (50%), Student Growth (20%), Equity (15%), and Learning Environment (15%). Scores are built from publicly available data including standardized test results, enrollment figures, and school climate indicators.
Read our full methodologyRelated reading
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