High · Regular · Grades 9 to 12
Hillsdale High, San Mateo, CA
Enrollment and teachers
- Students
- 1,585
- Teachers (FTE)
- 81.0
- Students per teacher
- 19.6
- Grades
- 9 to 12
This school's ratio is about the same as the district figure of 19.9. The California average across schools is 21.9. Ratios count all teachers, including specialists, so they are lower than typical class sizes.
School details
- Address
- 3115 Del Monte St., San Mateo, CA 94403
- Phone
- (650)558-2699
- District
- San Mateo Union High
- County
- San Mateo County
- Level
- High
- Type
- Regular
- Status
- Open
- Charter
- No
- Virtual
- No
- Locale
- City: Midsize
- NCES school ID
- 063498005923
School meals
- Free lunch
- 385
- Reduced-price lunch
- 15
- Free or reduced-price lunch
- 40025.2% of enrollment.
- Direct certification
- 290Students certified through programs such as SNAP, without an application.
- Community Eligibility Provision
- No
Schools in the Community Eligibility Provision (CEP) serve free meals to all students, so their free lunch counts often reflect direct certification or total enrollment. Free and reduced lunch shares are not comparable between CEP and non-CEP schools.
Related schools
Other high schools in San Mateo Union High
- Aragon High 1,658 students
- Burlingame High 1,583 students
- San Mateo High 1,557 students
- Mills High 1,115 students
- Capuchino High 1,061 students
- Peninsula High (Continuation) 123 students
- The Bridge Academy 54 students
High schools elsewhere in San Mateo
- Hillcrest at Youth Services Center San Mateo County Office of Education
- Gateway Center San Mateo County Office of Education
- Margaret J. Kemp San Mateo County Office of Education
We publish official enrollment and staffing data, not ratings or test scores.
Source: NCES Common Core of Data 2024-25 and F-33 finance 2020, via the Urban Institute Education Data Portal. Last reviewed October 2026. Blank values are not available, not applicable or suppressed in the source. See the methodology.