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Hillsdale High

3115 Del Monte St., San Mateo, CA 94403

BSchola Grade
Directions CallWebsite
Grades
9–12
High
Students
1,585
Enrolled 2024–25
Students per teacher
19.4 : 1
Full-time teachers
District
San Mateo Union High
San Mateo County

Schola Grade B · Above average

Letter grade (A–F) · compared with 1,321 California high schools · How we grade
Test scores58% proficient in math & reading
83rdpercentile
Equity27% of low-income students proficient
35thpercentile
Attendance16% chronically absent
83rdpercentile
Graduation rate91% graduate in 4 years
33rdpercentile
College readinessAt least 38% take AP, IB or dual-enrollment courses
77thpercentile
Class size19.4 students per teacher
67thpercentile

Percentiles compare this school with other California high schools; the line marks the middle. Data: test scores 2021–22, graduation and absenteeism 2022–23 (U.S. Department of Education, EDFacts); coursework 2023–24 (Civil Rights Data Collection); staffing 2024–25 (NCES).

About Hillsdale High

Hillsdale High is a public high school in San Mateo, California, serving grades 9–12. It is part of San Mateo Union High. The school is located in a midsize city in San Mateo County.

In the 2024–25 school year, 1,585 students were enrolled, with about 19.4 students for every full-time teacher. That ratio is larger than the typical California high school (18.5 students per teacher). Its Schola Grade is B (above average), compared with 1,321 California high schools.

Grades & enrollment

Students per grade, 2024–25Grades 9–12

Location & nearby schools

3115 Del Monte St.
San Mateo, CA 94403
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School details

Type
Public School · What this means
Level
High
Grades offered
9–12
Enrollment (2024–25)
1,585 students
Students per teacher
19.4 to 1
AP courses offered
20
Charter school
No
Magnet school
No
Locale
City — Midsize
School district
San Mateo Union High
County
San Mateo County
NCES school ID
063498005923

Schools near Hillsdale High

All 38 schools in San Mateo →
Aragon High
Public · Grades 9–12 · 1,658 students
A1.6 mi

School data comes from the U.S. Department of Education: the National Center for Education Statistics (NCES) Common Core of Data and EDGE school locations (2024–25) and Private School Survey (2023–24), the Civil Rights Data Collection (2023–24), and EDFacts (test results 2021–22; graduation and chronic absenteeism 2022–23), plus other public sources. Please contact the school to confirm enrollment, programs, and other details. How we source data.