SchoolRow
#338

San Mateo High

San Mateo, CA · San Mateo Union High

Regular public school · Grades 9-12 · City, midsize

338th of 1,528 California high schools statewide · better than 78% Declining

506 North Delaware St., San Mateo, CA 94401

(650) 558-2399Official website ↗NCES ID 063498005926Directory 202324

1,578
Students
2023–24 enrollment
18.1:1
Student / teacher ratio
38%
Free / reduced-price lunch
low-income indicator
21.4%
Chronically absent
CA average 20%

SchoolRow ranks San Mateo High 338th of 1,528 California high schools for 2024–25, based on CAASPP 2024–25 English and Math results — better than 78% of high schools statewide. Its statewide percentile went from 84th in 2015 to 78th in 2025 — declining.

Statewide percentile by year
25%50%75%78%201520202025no testing 2020–21

Percent meeting or exceeding the state standard, CAASPP 2024–25 · 304 students tested

English Language Arts
San Mateo High
63%
CA average
49%
Math
San Mateo High
44%
CA average
37%
Science
San Mateo High
43%
CA average
33%
English Language Arts over time San Mateo High CA average
25%50%75%63%49%201520202025no testing 2020–21
Math over time San Mateo High CA average
25%50%75%44%37%201520202025no testing 2020–21
Science over time San Mateo High CA average
25%50%75%43%33%20222025

Racial and ethnic breakdown of 1,578 students (202324, NCES) — history since 1987, with comparable seven-category changes from 2010

Hispanic49%White16%Asian24%7%
Hover the pie for details
categories changedHispanic 49%White 16%Asian 24%Two or more races 7%8%67%18%19872023
GroupTrend20102023Change
Hispanic40.6%49.3% 8.7 pts
Asian22.4%24.4% 2.0 pts
White22.9%16.2% 6.7 pts
Two or more races7.2%7.2% 0.0 pts
Pacific Islander4.0%1.6% 2.4 pts
Black2.7%1.1% 1.6 pts

NCES history for this school begins in 1987. Race categories changed by 2010: earlier data combines Asian and Pacific Islander students and does not consistently identify multiracial students. The chart retains that history, while the change table uses 2010 onward.

Typical home value $1.23M in zip 94401 as of 2026-05 · trend since 2000

$343K$685K$1.03M$1.37M$1.21M200020052010201520202025

Data Provided by Zillow Group

See recently sold homes in 94401 on Zillow →

Closest same-level schools, with 2024–25 state rank · ▲▼ = points better or worse than San Mateo High

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What school district is San Mateo High in?

San Mateo High is part of the San Mateo Union High district in San Mateo, California.

Is San Mateo High a good school?

SchoolRow ranks San Mateo High 338th of 1,528 California high schools (better than 78% statewide) based on 2024–25 test results (CAASPP 2024–25).

What is the racial makeup of San Mateo High?

Hispanic 49%, Asian 24%, White 16%, Two or more races 7% (1,578 students, 2023–24).

How much do homes near San Mateo High cost?

The typical home value in zip code 94401 is $1.23M as of 2026-05 (Zillow ZHVI).

Sources: state education department data (CAASPP 2024–25, low-income, chronic absenteeism), National Center for Education Statistics via the Urban Institute (enrollment, demographics, staffing), Zillow Group (home values). Rankings are computed by SchoolRow from state English and Math results within grade level; they measure test performance, not everything that makes a school good.