Hillsdale High
PublicHighGrades 9–12
3115 Del Monte St., San Mateo, CA 94403 · (650) 558-2699 · Part of San Mateo Union High School District
San Mateo’s School Grade A better than 86% of California school districts
Students
1,585
Students per teacher
19:1
Free or reduced lunch
25%
Setting
City
Grades
9–12
What stands out about Hillsdale High
- No state test results published for this school
On the path
Where San Mateo kids come from and go next. The whole path →
6–85 middle schoolsDepends on your address
9–12Hillsdale HighYou are here
Location
Directions ↗3115 Del Monte St., San Mateo
Students
Enrollment by grade
Grade 9372
Grade 10393
Grade 11409
Grade 12411
Enrollment over time
1,689’20
1,647’21
1,629’22
1,581’23
1,585’24
Down 6.2% since 2020–21.
Who goes here
Hispanic 38%White 31%Asian 20%Two or more races 9%Black 1%Native Hawaiian/Pacific Islander 1%American Indian/Alaska Native <1%
As reported to NCES, share of students with a reported race or ethnicity.
Parents talk
Questions and answers about Hillsdale High from San Mateo families.
Other schools in San Mateo Union High School District
School facts: U.S. Department of Education (NCES), 2024–2025 school year. Map: © OpenStreetMap contributors.