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San Mateo Union High — District Profile & Schools

San Mateo, California · San Mateo County

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WebsiteSchool Rankings
8,841
Students
8
Schools
19.4:1
Student-Teacher
456 teachers
9 - 12
Grades

Quick Facts

1,105
Avg. School Size
1,012
Total Staff

San Mateo Union High Calendar

10 events

Source

Wed, Aug 13

Event

First Day of School

First day of school for students - 2025-2026 school year

Mon, Sep 1

Holiday

Labor Day

Labor Day holiday - no school

Thu, Sep 25

Event

Public Hearing

Notice of Public Hearing

Nov 24 - 28

Break

Thanksgiving Break

Thanksgiving holiday break

Mon, Dec 22 - Fri, Jan 2

Break

Winter Break

Winter holiday break

Mon, Jan 19

Holiday

Martin Luther King Jr. Day

MLK Day holiday - no school

Mon, Feb 16

Holiday

Presidents Day

Presidents Day holiday - no school

Mon, Mar 30 - Fri, Apr 3

Break

Spring Break

Spring holiday break

Mon, May 25

Holiday

Memorial Day

Memorial Day holiday - no school

Fri, Jun 5

Event

Last Day of School

Last day of school for students - 2025-2026 school year

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Contact

Address
650 North Delaware St.
San Mateo, CA 94401
Phone
(650)558-2299

Staff & Students

Teachers (FTE)
456
Total Staff
1,012
Data Source
NCES Common Core of Data
School Year 2023-24

Frequently Asked Questions about San Mateo Union High

San Mateo Union High operates 7 schools in CA.

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