- Enrollment
- 1,585
- Students per teacher
- 17.2:1
- Resource Index
- 38/100
High school (grades 9-12) · San Mateo, CA
Aragon High
Federal NCES profile for Aragon High, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 33/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 063498005919
👥 S:T ratio 12
🌟 Gifted program 30
🎓 Counselors 17
📋 Attendance 74
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Aragon High earns 33/100 on the Resource Investment Index, with class sizes near the California median. It is also one of the largest schools in California.
- #2 of 3
- high schools in San Mateo · Resource Index
- 33
- Resource Index · Typical
- 22.1:1
- students per teacher
- 13.6%
- free-lunch eligible
Aragon High has class sizes near the California median. Computed live against every California school reporting to NCES.
By Resource Investment Index, Aragon High ranks #2 of 3 high schools in San Mateo, CA.
School address
District: San Mateo Union High · California
NCES ID 063498005919 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
-54 students YoY
Aragon High held near 1,686 students from 2022-23 to 2023-24 (-54 headcount).
Teacher FTE added 75.2 → 78.0 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Steady CCD campus
-54 students YoY 063498005919 · San Mateo, CA High · MID · TRAD
1,658 enr · 22.1:1 · 13.6% lunch · RII 33
Nearest enrollment peer: Hillsdale High (1,585 students)
Aragon High held near 1,686 students from 2022-23 to 2023-24 (-54 headcount). Teacher FTE added 75.2 → 78.0 across the same CCD years. Read with this school → · District book → · California schools → · Find another →
Aragon High in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- This school
Aragon High
1,658 students
- Hillsdale High
Hillsdale High
1,585 students
- Burlingame Hig
Burlingame High
1,583 students
- San Mateo High
San Mateo High
1,557 students
- Mills High
Mills High
1,115 students
- Capuchino High
Capuchino High
1,061 students
What this shows Aragon High reports 1,658 students on the CCD universe file.
How Aragon High compares
Aragon 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 | 22.1:1 | ▲ 3% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 13.6% | ▼ 75% | 55.5% | 51.7% |
| Enrollment | 1,658 | top 5% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
22.1:1
Leaner classes than 10% of US schools, heavier class loads than most.
1,658
Bigger than 97% of US schools by enrollment, a large campus nationally.
Equity indicators methodology
Economic need
13.6%
free-lunch eligible
- 75% 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
22.1:1
students per teacher
- 3% above state mean
Top 54% in California - lower ratio than 46% of state schools
Above 20:1, running heavier than the typical U.S. public school; staffing is comparatively stretched.
Engagement
10.6%
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
$24,423
per pupil, district-wide
- above California avg of $18,665
Well above the U.S. public-school average, reflecting substantially higher local or state investment per enrolled student.
Support staff
Counselors4.0 FTE
Per 415 students, the combined health-and-guidance staffing load for this school.
Discipline context
3
in-school suspensions + 25 out-of-school
Suspension rate: 0.2 per 100 students. Combined in-school and out-of-school rate: 1.7 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
Asian 33.4%
Hispanic or Latino 27.2%
White 26.1%
Two or More 10.7%
Native Hawaiian / Pacific Islander 2.0%
African American 0.6%
Largest group: Asian at 33.4% of enrollment.
Student-body diversity index 73.4/100
Simpson diversity index - at 73.4, Aragon High is more mixed than the California school average of 46.0.
Programs
AP courses offered 20
District finance for San Mateo Union High reports $24,423 per pupil (NCES F-33) - open the district page for the full revenue mix.
How Aragon High Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Hillsdale High | Similar size | Similar economic need | Lower S:T ratio |
| Burlingame High | Similar size | Similar economic need | Similar S:T ratio |
| San Mateo High | Similar size | Higher economic need | Lower S:T ratio |
| Mills High | Smaller | Similar economic need | Similar S:T ratio |
| Capuchino High | Smaller | Higher economic need | Lower S:T ratio |
Comparisons are relative to Aragon High's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,583
- Students per teacher
- 22:1
- Resource Index
- 36/100
- Enrollment
- 1,557
- Students per teacher
- 18.5:1
- Resource Index
- 30/100
- Enrollment
- 1,115
- Students per teacher
- 21:1
- Resource Index
- 38/100
- Enrollment
- 1,061
- Students per teacher
- 17.4:1
- Resource Index
- 33/100
Similar high schools in San Mateo
2 comparable high schools (grades 9-12) serving the same city.
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 (~1,658 students)
Frequently asked questions about Aragon High
How many students attend Aragon High?
Aragon High has 1,658 students enrolled. It is a high school in San Mateo, CA. CCD year-over-year: 1,740 (2022-23) → 1,686 (2023-24), nearly flat (-54).
What is the student-teacher ratio at Aragon High?
The student-teacher ratio at Aragon High is 22.1:1, which is 3% higher than the California average of 21.5:1 and 41% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Aragon High?
13.6% of students at Aragon High are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Aragon High?
The largest demographic group at Aragon High is Asian at 33.4% of enrollment, in San Mateo, CA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 73.4/100.
What is the Resource Investment Index for Aragon High?
Aragon High has a Resource Investment Index of 33/100 (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 Aragon High rank among high schools in San Mateo?
By Resource Investment Index, Aragon High ranks #2 of 3 high schools in San Mateo, CA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all high schools in San Mateo on the city page.
What other schools are in San Mateo Union High?
Besides Aragon High, San Mateo Union High also operates Hillsdale High (1,585 students), Burlingame High (1,583 students), and San Mateo High (1,557 students). See the San Mateo Union High district page for the complete list.