Hillsdale High School
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Aragon High School → San Mateo High School → Burlingame High School → Sequoia High School → Woodside High School → Compare all similar →Enrollment trend & projection
If this trend holds (-0.1%/yr, Total enrollment)
At per-pupil funding of $ / student:
| Horizon | Projected Total enrollment | Change | Funding impact / yr |
|---|---|---|---|
| 1 yr (2027) | ~1,515 | -2 | $0 |
| 3 yr (2029) | ~1,511 | -6 | $0 |
| 5 yr (2031) | ~1,506 | -11 | $0 |
Straight-line extrapolation of the recent annual rate — a what-if, not a forecast of intent. Default = California's LCFF base grant for grades 9–12 ($12,423/ADA). Edit the figure to match your school.
Enrollment stability & demand — 2024-25
Two complementary signals: retention (do students stay once enrolled?) and demand (are families choosing the school?). Read against the San Mateo County baseline — the demographic tide is moving every CA HS, so a school's gap vs. county is the actionable signal.
Hillsdale High School is recruiting families faster than San Mateo County is shrinking (school +11.6% vs. county -5.3%), but 94 students didn't make it to year-end. The recruitment engine works; the mid-year exits are worth understanding.
94 of 1,629 students who enrolled at Hillsdale High School this year didn't maintain continuous enrollment (5.8% non-stability). Mid-year transfers, dropouts, and other exits are all counted.
Stability by student group
Nearest peer high schools
Source: California Department of Education, Stability Rate 2024-25. Benchmarks limited to non-virtual public & charter HS with ≥100 cumulative enrollees so by-design-high-churn continuation schools don't dominate the bottom of the distribution. Cumulative enrollment counts every student on the rolls during the year, so it can exceed peak-day enrollment.
Chronic absenteeism — 2024-25
Share of students missing 10% or more of expected attendance — the leading indicator that often precedes the demand decline shown above. Families disengaging tend to raise absenteeism first, then formally leave. Basis: grades 9–12.
Absenteeism is up 7.5 pp since 2016-17. A rising absenteeism trend often precedes formal departure — worth investigating which subgroups are driving it.
Source: California Department of Education, Chronic Absenteeism 2024-25. Benchmarks limited to non-virtual public & charter HS with ≥100 eligible students. CDE didn't publish a usable 2019-20 file (COVID).
SBAC academic outcomes — grade 11, 2025
Share of grade-11 students meeting or exceeding the California standard on Smarter Balanced ELA and Math. This is the academic-readiness signal that pairs with UC Reach (post-grad outcomes), stability (retention), and absenteeism (engagement). Note: statewide median Math is only ~20% — a school at 20% isn't an outlier; one at 45%+ genuinely is.
Source: California Assessment of Student Performance and Progress (CAASPP) Smarter Balanced research files. Benchmarks limited to non-virtual public & charter HS with ≥30 tested students.
Student composition — 2025-26
HS grades 9–12 racial/ethnic composition and program subgroups, from CDE Census Day Enrollment. Two-year shift shown when ≥1 pt — surfaces how the community served has changed since 2023-24.
Race / ethnicity
Program subgroups
Source: California Department of Education, Census Day Enrollment 2025-26 (HS grades 9–12). Δ shown when shift is ≥1 pt since 2023-24. Categories below 0.5% omitted.
District financial profile — San Mateo Union High (FY2020)
From 4 years of NCES F-33 filings (the federally-mandated district finance survey). Public schools don't have their own books — the district does. These figures show the financial scale, revenue dependence, instruction-vs-overhead mix, and long-term debt that shape what a school can sustain.
Local: 85.0%
Federal: 3.6%
Source: NCES F-33 Annual Survey of School System Finances (Urban Institute Education Data API). Latest year currently published: FY2020. F-33 is a district-level federal filing — it reflects the San Mateo Union High as a whole, not this individual school's books. Revenue mix shows where the district's dollars come from (state aid dominates in CA via LCFF). Instruction share is current expenditure on instruction ÷ total current expenditure (national benchmark ~60%). Long-term debt is end-of-year outstanding (mostly facilities bonds).
On the peer median (33.0%) · Ranked #6 of 10 similar schools
18.5%
33.0%
53.3%
32.1%
Higher than 75% of California high schools (1105 ranked, ≥50 seniors)
Hillsdale High School's UC Reach of 32.1% is in the top quartile statewide (median 18.5%; top 25% bar 32.0%) — but it's still below the top-10% bar of 53.3%.
For context, the elite tier (top 1%) clears 102.7% — a gap of 71 pp from where this school sits.
Overall, Hillsdale High School's UC Reach is higher than 75% of California high schools (1105 ranked).
Hillsdale High School — Enrollment & Outcomes Snapshot
Public · San Mateo · vs. 10 most similar nearby schools
- ▸On UC Reach, Hillsdale High School sits in the middle of its similar-school group (ranked #6 of 10): 32% vs. a peer median of 33%.
- ▸Its UC Reach has held roughly steady since 2018.
- ▸Senior-class enrollment is up 12% (362→404 from 2018 to 2026), outpacing the peer-group median of -3%.
- ▸At its recent rate (-0.1%/yr), enrollment projects to ~1511 by 2029 — about 6 fewer students than today.
Enrollment projection
That's about 6 fewer students. At per-student funding of $ per student, that's roughly $0 in annual state funding at risk.
Default = California's LCFF base grant for grades 9–12 ($12,423 per ADA) — adjust to your district's actual per-pupil figure. Projection extrapolates the recent annual rate — not a forecast of intent.
Your school vs. its 10 most similar nearby schools
| School | Type | Size | UC Reach | Enroll. trend |
|---|---|---|---|---|
| Hillsdale High School | Public | 1517 | 32.1% | +12% |
| Peer-group median | 33.0% | -3% | ||
| Aragon High School | Public | 1654 | 53.7% | +14% |
| San Mateo High School | Public | 1532 | 33.0% | -17% |
| Burlingame High School | Public | 1627 | 44.7% | +18% |
| Sequoia High School | Public | 1839 | 21.3% | -5% |
| Woodside High School | Public | 1694 | 31.7% | -2% |
| Carlmont High School | Public | 2385 | 54.1% | +4% |
| Mills High School | Public | 1120 | 59.3% | -16% |
| Capuchino High School | Public | 1086 | 14.2% | -1% |
| South San Francisco Hs | Public | 1224 | 14.5% | -26% |
| Henry M. Gunn High | Public | 1606 | — | -16% |
UC Reach = top-6 UC admits ÷ senior class (can exceed 100% when students are admitted to multiple campuses). Enrollment trend = first-to-latest grade-12 change on file. Similar schools matched on proximity, size, type. Methodology →
Admit rate vs. CA peer average, by campus ⓘ
How does this school's admit rate at each UC compare to other CA schools whose applicant pool averages the same GPA?
| Campus | Applicant GPA (avg) | Actual admit rate | CA peer avg | Δ | Verdict |
|---|---|---|---|---|---|
| UC Berkeley | 4.05 | 13.8% | 13.5% | +0.3pp | On target |
| UCLA | 4.06 | 8.7% | 9.6% | -0.8pp | On target |
| UC San Diego | 4.03 | 19.1% | 19.3% | -0.1pp | On target |
| UC Santa Barbara | 4.00 | 24.6% | 32.7% | -8.1pp | Under |
| UC Irvine | 4.02 | 18.3% | 27.2% | -8.9pp | Under |
| UC Davis | 3.99 | 31.7% | 32.8% | -1.1pp | On target |
Where Hillsdale High School sits vs. all California schools ⓘ
Overall, this school admits its UC applicants in line with what their GPAs predict (19.7% actual vs. 22.8% expected).
UC Outcomes Trend — 2018–2025
Class size from CDE grade 12 enrollment. Campus-level data — applicant/admit totals may count a student at multiple campuses more than once.
Campus Breakdown — 2025
| Campus | Applicants | Admits | Enrollees | Admit Rate | UC Reach | Yield | Avg GPA (App) | Avg GPA (Adm) |
|---|---|---|---|---|---|---|---|---|
| UC Berkeley → Elite | 109 | 15 | 7 | 13.8% | 3.6% | 46.7% | 4.05 | 4.25 |
| UCLA → Elite | 103 | 9 | 6 | 8.7% | 2.2% | 66.7% | 4.06 | 4.30 |
| UC San Diego → Selective | 115 | 22 | 3 | 19.1% | 5.4% | 13.6% | 4.03 | 4.24 |
| UC Santa Barbara → Selective | 114 | 28 | 4 | 24.6% | 6.8% | 14.3% | 4.00 | 4.27 |
| UC Irvine → Selective | 109 | 20 | — | 18.3% | 4.9% | — | 4.02 | 4.22 |
| UC Davis → | 120 | 38 | 11 | 31.7% | 9.2% | 28.9% | 3.99 | 4.20 |