Enrollment
1,542
California · 2024-25 NCES data
2024-25 NCES data High school (grades 9-12) NCES 063132007136
Diamond Ranch High — Pomona, CA
Federal NCES profile for Diamond Ranch High, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators — Resource Investment Index 46/100.
👥 Class size 6
📚 AP courses 90
🌟 Gifted program 70
🎓 Counselors 38
📋 Attendance 28
How this works: Each indicator above is scored 0–100 from federal NCES and CRDC data, then averaged into the Resource Investment Index. This measures resource allocation — staffing, programs, and support services — not standardized test scores or academic outcomes. Full methodology →
The verdict
Diamond Ranch High earns a D Resource Investment Index (46/100), with class sizes near the California median.
- D
- Resource Index · 46/100
- 23.4:1
- students per teacher
- 59.1%
- free-lunch eligible
- 1,542
- students enrolled
School address
District: Pomona Unified · California
Public location data per NCES (National Center for Education Statistics) Common Core of Data. Verify the school's current address on the NCES CCD record.
Teachers (FTE)
66.0
Federal CCD staff survey
Students per teacher
23.4:1
vs 21.6:1 California avg
+8% vs state
Free-lunch eligible
59.1%
vs 55.5% California avg
+6% vs state
Student-teacher ratio in context
How Diamond Ranch High compares with California and U.S. medians
The federal record — no proprietary index, no editorial formula.
PlainSchools publishes the actual federal measurements — enrollment, staffing, demographics, discipline, and finance — straight from the NCES Common Core of Data, CRDC, and F-33 surveys. No composite rating, no opinion-based score on top. You get the same raw numbers researchers and policymakers use, with benchmarks, spending context, and equity indicators computed from the same federal datasets. Full methodology linked below.
What this school's NCES data tells you
Diamond Ranch High reports 1,542 enrolled students to the National Center for Education Statistics (NCES) alongside 66.0 full-time-equivalent teachers, producing a 23.4:1 student-teacher ratio. That figure sits 8% above the California state mean of 21.6:1, signalling larger average class loads than peers in the same state. Against the national 2024-25 average of 15.7:1, it is 49% higher, a useful calibration for families comparing districts across state lines.
Title I and federal lunch eligibility offer another window into the student body: 59.1% of pupils qualify for free meals, a proxy for household income that federal programs use to direct funding. The free-lunch share is 6% above the California average and 14% above the national baseline. The school offers 18 Advanced Placement courses, a stronger academic pipeline indicator than enrollment alone. Counselor coverage works out to roughly 308 students per counselor, above the ASCA-recommended ceiling of 250:1. Chronic absenteeism — missing 10% or more of school days — stands at 28.9% according to the 2021-22 Civil Rights Data Collection.
On the finance side, the surrounding Pomona Unified spends $17,545 per pupil district-wide, above the California average of $16,509 and above the national average of $16,593. Revenue comes 21.6% from local sources (property taxes), 60.9% from the state, and 17.6% from federal programs per the NCES F-33 finance survey. Taken together, these measurements produce a Resource Investment Index of 46/100 (D), calculated from 5 distinct NCES and CRDC indicators measuring resource allocation rather than academic outcomes.
Source: National Center for Education Statistics Common Core of Data + CRDC + F-33 · 2024-25
How Diamond Ranch High compares
Cross-validating school-level NCES values against California state and U.S. national means lets readers see whether this school is an outlier or in line with peers.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 23.4:1 | ▲ 8% | 21.6:1 | 15.7:1 |
| Free-lunch eligible | 59.1% | ▲ 6% | 55.5% | 51.8% |
| Enrollment | 1,542 | top 94% | — | — |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
Class size vs. every US school
Students per teacher (lower means more individual attention)
23 smaller classes than 7% of 92,598 US schools
Each bar is a band; taller bars hold more US schools. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source U.S. Department of Education — NCES Common Core of Data · 2024-25
School size vs. every US school
Total enrollment — where this school sits by size (neither large nor small is 'better')
1,542 larger than 96% of 95,891 US schools
Each bar is a band; taller bars hold more US schools. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source U.S. Department of Education — NCES Common Core of Data · 2024-25
What the federal data reveals about equity at this school
Federal measurements — not ratings — surface the resource and opportunity picture. Below are the indicators that researchers, civil-rights monitors, and funding formulas use to assess equity.
Economic need
59.1%
free-lunch eligible
— 6% above the California average of 55.5%
Above the 40% Title I schoolwide threshold — federal funds support the whole school, not individual students.
Staffing depth
23.4:1
students per teacher
— 8% above state mean
Top 65% in California — lower ratio than 35% of state schools
Above 20:1 — larger class loads than the typical U.S. public school; staffing is stretched relative to enrollment.
Engagement
28.9%
chronically absent (missed 10%+ of school days)
Chronic absenteeism at or above 20% — the CDC threshold for "high" — signals significant barriers to regular attendance.
Funding equity
$17,545
per pupil, district-wide
— above California avg of $16,509
Above the U.S. public-school average, reflecting higher local or state investment per enrolled student.
Support staff
Counselors5.0 FTE
Per 308 students — the combined health-and-guidance staffing load for this school.
Discipline context
2
in-school suspensions + 76 out-of-school
Suspension rate: 0.1 per 100 students. Combined in-school and out-of-school rate: 5.1 per 100 students. Reported via the Civil Rights Data Collection.
Overview
Enrollment 1,542 Top 94% in California — larger than 6% of 10,006 state schools
Teachers (FTE) 66.0
Students per teacher 23.4:1 +8% vs state
Free-lunch eligible 59.1% +6% vs state
NCES ID 063132007136
Student demographics
Hispanic or Latino 78.1%
Asian 10.3%
African American 5.0%
White 3.2%
Two or More 2.9%
Native Hawaiian / Pacific Islander 0.5%
Largest group: Hispanic or Latino at 78.1% of enrollment.
Programs & staff
AP courses offered 18
Gifted & talented Yes
Counselors (FTE) 5.0
Students per counselor 308:1
Discipline & special education
Chronically absent 28.9%
In-school suspensions 2
Out-of-school suspensions 76
Funding & spending
District-wide per-pupil expenditure for Pomona Unified, which includes Diamond Ranch High.
$17,545
Per student
+6%
vs California
Avg $16,509
+6%
vs U.S.
Avg $16,593
Revenue mix
Local 21.6%
State 60.9%
Federal 17.6%
Source: NCES F-33 School District Finance Survey District-level finance · FY 2021-22 Per-pupil expenditure reflects the district-wide average. Individual school budgets are not reported at the federal level.
Other Schools in This District
- Enrollment
- 1,567
- Students per teacher
- 22.2:1
- Enrollment
- 1,204
- Students per teacher
- 26.2:1
- Enrollment
- 993
- Students per teacher
- 19.6:1
- Enrollment
- 895
- Students per teacher
- 20.3:1
- Enrollment
- 741
- Students per teacher
- 21.8:1
Similar high schools in Pomona
6 comparable high schools (grades 9-12) serving the same city.
Garey High
Standard public school
1,567 students 22.2:1 students per teacher
Pomona High
Standard public school
993 students 19.6:1 students per teacher
Ganesha High
Standard public school
895 students 20.3:1 students per teacher
International Polytechnic High
Alternative education program
458 students 22:1 students per teacher
Village Academy High School at Indian Hill
Alternative education program
270 students 18.6:1 students per teacher
Park West High (Continuation)
Alternative education program
225 students 15.3:1 students per teacher
Educator & family resources
In-depth guides on understanding NCES data, school choice, and education funding.
Understanding NCES data
How CCD, CRDC and EDFacts feed every public-school number you see.
Choose a school district
Eight signals that matter more than the overall ranking number.
How schools are funded
Title I, F-33, state aid formulas and what per-pupil spending really means.
Chronic absenteeism
Why missing 10% of school matters and how it varies by district.
Magnet vs charter vs traditional
Three school types, three funding models, three sets of trade-offs.
School discipline data
What CRDC suspension and expulsion records do and don't reveal.
Before you act on this record
Treat this page as the federal baseline — then verify locally.
- Compare Diamond Ranch High side-by-side with another school you're considering on the same NCES measures. Compare schools
- Read the district context — spending per pupil, staffing, and equity ranking are district-level decisions that shape this school. District profile
- Confirm current enrollment windows, programs, and boundaries with the school directly — federal data lags the current school year. Choosing guide
Figures are the school's reported federal record (CCD 2024-25, CRDC 2021-22) — coverage varies by entity type, and PlainSchools does not rate or rank schools.
Frequently asked questions about Diamond Ranch High
How many students attend Diamond Ranch High?
Diamond Ranch High has 1,542 students enrolled. It is a high school in Pomona, CA.
What is the student-teacher ratio at Diamond Ranch High?
The student-teacher ratio at Diamond Ranch High is 23.4:1, which is 8% higher than the California average of 21.6:1 and 49% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Diamond Ranch High?
59.1% of students at Diamond Ranch High are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Diamond Ranch High?
The largest demographic group at Diamond Ranch High is Hispanic or Latino at 78.1%. The school serves a diverse student body in Pomona, CA.
What is the Resource Investment Index for Diamond Ranch High?
Diamond Ranch High has a Resource Investment Index of 46/100 (D) based on 5 factors: student-teacher ratio, AP course offerings, counselor availability, attendance rates. This index measures federal resource allocation — staffing levels, program availability, and support services — not standardized test scores or academic outcomes.
Is Diamond Ranch High a good school?
Diamond Ranch High earns a D Resource Investment Index (46/100), with class sizes near the California median. The Resource Investment Index reflects staffing, counselor access, gifted programs, and attendance reported to NCES, not test scores or academic outcomes, so treat it as a resource snapshot rather than an overall rating.