Enrollment & Outcomes Scorecard
Diamond Ranch High School
Public · Pomona · Los Angeles County · 1,518 students · Class of 2025
UC Reach · Class of 2025
19%
Higher than 52% of California high schools
On the peer median (18.1%)
· Ranked #5 of 11 similar schools
5-year UC Reach
2021 · 14.6%
2025 · 19.1%
-3%
Senior-class enrollment (2018–2026)
+5.0 pp
vs. Los Angeles County baseline (-8%)
~1478
5-yr projected enrollment (40 fewer than today)
- ▸On UC Reach, Diamond Ranch High School sits in the middle of its similar-school group (ranked #5 of 11): 19% vs. a peer median of 18%.
- ▸Its UC Reach has slipped 2 points since 2018 — worth watching.
- ▸Across the top-6 UC campuses, Diamond Ranch High School is admitting at roughly +10 percentage points above what its average applicant GPA (3.903) alone would predict (30% actual vs. 20% expected). That's a meaningful signal — it can reflect UC's track record with this school's graduates, students presenting strongly in UC's holistic review (essays, EC's, context), or institutional familiarity helping at the margin. The data can't distinguish which, but the pattern itself is real and worth understanding.
- ▸Senior-class enrollment is down 3% (405→392 from 2018 to 2026), outpacing the peer-group median of -8%.
- ▸In business terms, this is market-share growth during a market contraction. Los Angeles County's senior population shrank 8% over the same window — Diamond Ranch High School only shrank 3%. So Diamond Ranch High School picked up about 5 percentage points of relative share — families chose it over the alternatives even as the overall pool got smaller. That's overperforming the market in a shrinking market.
- ▸At its recent rate (-0.9%/yr), enrollment projects to ~1478 by 2029 — about 40 fewer students than today.
Most similar nearby schools
| School | Type | UC Reach | Enroll. |
|---|---|---|---|
| Garey High School | Public | 12.5% | -22% |
| Nogales High School | Public | 15.5% | -13% |
| South Hills High School | Public | 18.8% | -1% |
| Don Antonio Lugo High School | Public | 9.9% | -24% |
| Glen a Wilson High School | Public | 31.8% | -3% |
| San Dimas High School | Public | 14.0% | -10% |
UC Reach = top-6 UC admits ÷ senior class. Sources: UCOP Admissions by Source School, CDE enrollment, IRS Form 990, NCES F-33. Test Prep Gurus Intelligence by Test Prep Gurus · Methodology
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