Address

3115 DEL MONTE ST.
SAN MATEO, CA 94403
Copy Address

Phone Number

650-558-2699

Website

http://hhs.smuhsd.org

Important Links: About the Board Board of Trustees Calendar of Events School Year Calendar Student Board Council View Full Calendar View Full Calendar

School Type

Public School

Grades Served

09-12

School Level

High

Also Known As

Hillsdale High (Official Name Supplied)

Student and Staff Info

Student Enrollment: 1,273

--Gathered from public sources that schools self report. These may be inaccurate.--

School District

San Mateo Union High

Interactive Map

California Education Info

California School District Maps and Boundaries in 2026: What Parents, Educators, and Communities Should Know

California Teacher Certification in 2026: What Educators Need to Know

Other Close Schools

Abbott Middle School in San Mateo, CA (0.3 miles)

Laurel Elementary School in San Mateo, CA (0.5 miles)

Meadow Heights Elementary School in San Mateo, CA (0.5 miles)

Beresford Elementary School in San Mateo, CA (0.6 miles)

St Gregory School in San Mateo, CA (0.7 miles)

Related School Info

View All Schools In San Mateo, CA

View All School Districts In San Mateo, CA

View All School Districts In California

View All Schools and School Districts In And Around 94403

Schools With "Gregory" in Their Name in The United States

Information is generated using publicly accessible school-supplied data and may be inaccurate

Last Updated: 2026-06-14 12:45:21 || School Id: 14006