- Enrollment
- 2,148
- Students per teacher
- 23.1:1
- Resource Index
- 52/100
High school (grades 9-12) · Diamond Bar, CA
Diamond Bar High
Federal NCES profile for Diamond Bar High, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 48/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 064128007894
👥 S:T ratio 0
🌟 Gifted program 70
🎓 Counselors 49
📋 Attendance 75
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Diamond Bar High earns 48/100 on the Resource Investment Index, with class sizes larger than 88% of California schools. It is also one of the largest schools in California.
- #2 of 10
- public schools in Diamond Bar · Resource Index
- 48
- Resource Index · Typical
- 26.7:1
- large classes for California
- 21.3%
- free-lunch eligible
Diamond Bar High has class sizes larger than 88% of California schools. Computed live against every California school reporting to NCES.
By Resource Investment Index, Diamond Bar High ranks #2 of 10 public schools in Diamond Bar, CA.
School address
District: Walnut Valley Unified · California
NCES ID 064128007894 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
-25 students YoY
Diamond Bar High held near 2,532 students from 2022-23 to 2023-24 (-25 headcount).
Teacher FTE added 96.3 → 99.5 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Steady CCD campus
-25 students YoY 064128007894 · Diamond Bar, CA High · LARGE · TRAD
2,563 enr · 26.7:1 · 21.3% lunch · RII 48
Nearest enrollment peer: Walnut High (2,148 students)
Diamond Bar High held near 2,532 students from 2022-23 to 2023-24 (-25 headcount). Teacher FTE added 96.3 → 99.5 across the same CCD years. Read with this school → · District book → · California schools → · Find another →
Diamond Bar High in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- This school
Diamond Bar High
2,563 students
- Walnut High
Walnut High
2,148 students
- Chaparral Midd
Chaparral Middle
1,349 students
- Suzanne Middle
Suzanne Middle
1,190 students
- South Pointe M 979
South Pointe Middle
979 students
- Evergreen Elem 709
Evergreen Elementary
709 students
What this shows Diamond Bar High reports 2,563 students on the CCD universe file.
How Diamond Bar High compares
Diamond Bar High held steady on CCD headcount: ratios and free-lunch share vs California and U.S. means.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 26.7:1 | ▲ 24% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 21.3% | ▼ 62% | 55.5% | 51.7% |
| Enrollment | 2,563 | top 1% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
26.7:1
Leaner classes than 3% of US schools, heavier class loads than most.
2,563
Bigger than 99% of US schools by enrollment, a large campus nationally.
Equity indicators methodology
Economic need
21.3%
free-lunch eligible
- 62% below the California average of 55.5%
Below the 40% Title I threshold, among the lower-need profiles in the state; federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
26.7:1
students per teacher
- 24% above state mean
Top 88% in California - lower ratio than 12% of state schools
Well above 20:1, one of the more stretched staffing loads nationally relative to enrollment.
Engagement
10.2%
chronically absent (missed 10%+ of school days)
In the 10-15% range, above the pre-pandemic national baseline but within the broader post-pandemic picture.
Funding equity
$13,963
per pupil, district-wide
- below California avg of $18,665
Well below the U.S. average per-pupil spend, a notably leaner funding position that may affect programs, facilities, and staffing.
Support staff
Counselors10.0 FTE
Per 256 students, the combined health-and-guidance staffing load for this school.
Discipline context
86
in-school suspensions + 51 out-of-school
Suspension rate: 3.4 per 100 students. Combined in-school and out-of-school rate: 5.3 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
Asian 71.9%
Hispanic or Latino 17.2%
White 5.0%
Two or More 4.1%
African American 1.4%
Native Hawaiian / Pacific Islander 0.4%
Largest group: Asian at 71.9% of enrollment.
Student-body diversity index 44.9/100
Simpson diversity index - at 44.9, Diamond Bar High is about as mixed as the California school average of 46.0.
Programs
AP courses offered 26
Gifted & talented Yes
District finance for Walnut Valley Unified reports $13,963 per pupil (NCES F-33) - open the district page for the full revenue mix.
How Diamond Bar High Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Walnut High | Similar size | Similar economic need | Lower S:T ratio |
| Chaparral Middle | Smaller | Similar economic need | Higher S:T ratio |
| Suzanne Middle | Smaller | Similar economic need | Similar S:T ratio |
| South Pointe Middle | Smaller | Similar economic need | Similar S:T ratio |
| Evergreen Elementary | Smaller | Similar economic need | Similar S:T ratio |
Comparisons are relative to Diamond Bar High's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,349
- Students per teacher
- 30.7:1
- Resource Index
- 41/100
- Enrollment
- 1,190
- Students per teacher
- 27:1
- Resource Index
- 43/100
- Enrollment
- 979
- Students per teacher
- 27.2:1
- Resource Index
- 47/100
- Enrollment
- 709
- Students per teacher
- 25.3:1
- Resource Index
- 27/100
Nationwide high schools with similar size or staffing
Out-of-state peers matched by enrollment and by student-teacher ratio, not the same-city or same-district lists above.
Similar enrollment (~2,563 students)
Frequently asked questions about Diamond Bar High
How many students attend Diamond Bar High?
Diamond Bar High has 2,563 students enrolled. It is a high school in Diamond Bar, CA. CCD year-over-year: 2,557 (2022-23) → 2,532 (2023-24), nearly flat (-25).
What is the student-teacher ratio at Diamond Bar High?
The student-teacher ratio at Diamond Bar High is 26.7:1, which is 24% higher than the California average of 21.5:1 and 70% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Diamond Bar High?
21.3% of students at Diamond Bar High are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Diamond Bar High?
The largest demographic group at Diamond Bar High is Asian at 71.9% of enrollment, in Diamond Bar, CA.
What is the Resource Investment Index for Diamond Bar High?
Diamond Bar High has a Resource Investment Index of 48/100 (typical reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, gifted-program reporting, counselor availability, chronic absenteeism. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Diamond Bar High rank among public schools in Diamond Bar?
By Resource Investment Index, Diamond Bar High ranks #2 of 10 public schools in Diamond Bar, CA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all public schools in Diamond Bar on the city page.
What other schools are in Walnut Valley Unified?
Besides Diamond Bar High, Walnut Valley Unified also operates Walnut High (2,148 students), Chaparral Middle (1,349 students), and Suzanne Middle (1,190 students). See the Walnut Valley Unified district page for the complete list.