Hillsdale High
Public
High Grades 9–12
Part of San Mateo Union High
3115 Del Monte St., San Mateo, CA 94403 · (650) 558-2699
Community ratings
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Academic performanceComing soon
State test scores coming soon
Proficiency and other measures from the CA Department of Education report card, shown against the state average.
At a glance
1,585Students enrolled
19:1Student–teacher ratio
25%Free / reduced lunch
CitySetting
Regular SchoolSchool type
Enrollment by grade
Grade 9372
Grade 10393
Grade 11409
Grade 12411
Students
Hispanic · 38%597
White · 31%489
Asian · 20%313
Two or more races · 9%148
Black · 1%16
Native Hawaiian/Pacific Islander · 1%16
American Indian/Alaska Native · 0%2
Counts as reported to NCES; percentages are of students with a reported race/ethnicity.
Enrollment · last 5 years
1,689’20
1,647’21
1,629’22
1,581’23
1,585’24
Location
3115 Del Monte St. San Mateo
Neighbor reviews
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School facts from the U.S. Department of Education (NCES), 2024-2025 school year. Community ratings and reviews reflect neighbor opinions, not an official measure of school quality.