Hillsdale High School
High school in San Mateo, CA · San Mateo Union High · Grades 9-12
On the spring 2026 state tests, 68% of Hillsdale High School students met or exceeded California's reading (ELA) standard and 43% met the math standard. In reading, that is 2 points below the San Mateo Union High average (69%) and 18 points above the California average (49%). Its reading result is higher than 67% of Bay Area high schools, and it ranks 2nd of 3 public high schools in San Mateo. Reading results in 2026 were 3 points higher than in 2024, and math results were 6 points higher than in 2024.
Test scores, 2024 to 2026
| Subject | Spring 2024 | Spring 2025 | Spring 2026 | Change |
|---|---|---|---|---|
| Reading (ELA) | 65% | 72% | 68% | +3 pts |
| Math | 37% | 42% | 43% | +6 pts |
Compared with nearby averages
| Spring 2026 | Reading (ELA) | Math |
|---|---|---|
| Hillsdale High School | 68% | 43% |
| San Mateo Union High | 69% | 51% |
| San Mateo County | 59% | 53% |
| California | 49% | 38% |
Where graduates go
Share of the class of 2022-23 enrolled in college within 16 months of graduating.
For fall 2025, UC admitted 114 of 155 freshman applicants from Hillsdale High School (74%), and 41 enrolled.
Homes near Hillsdale High School
The typical home value in ZIP code 94403, where Hillsdale High School is located, is $1.81M, up 6.8% over the past year (Zillow Home Value Index). Prices inside the school's attendance zone can differ.
Zillow and Redfin can both search for homes inside a school’s attendance zone and email you new listings. Search for the school by name on either site and save the search.
Nearby high schools
| Distance | School | Reading (ELA) | Math | Typical home value (ZIP) |
|---|---|---|---|---|
| 1.5 mi | Aragon HighSan Mateo · Grades 9-12 | 81% | 65% | $2.46M |
| 2.2 mi | Carlmont HighBelmont · Grades 9-12 | 87% | 75% | $2.27M |
| 2.8 mi | Design Tech High CharterRedwood City · Grades 9-12 | 81% | 59% | $1.78M |
| 3.2 mi | San Mateo HighSan Mateo · Grades 9-12 | 62% | 48% | $1.20M |
| 3.9 mi | Burlingame HighBurlingame · Grades 9-12 | 76% | 61% | $3.52M |
| 5.3 mi | Sequoia HighRedwood City · Grades 9-12 | 63% | 37% | $2.71M |
School details
- Address
- 3115 Del Monte Street, San Mateo, CA 94403
Get directions · See it on our map - Phone
- (650) 558-2699
- District
- San Mateo Union High
- County
- San Mateo County
- Grades
- 9-12
- Students
- 1,517 (2025-26)
- Type
- High school · Traditional
- Website
- hhs.smuhsd.org
- State school code
- 41690474133070
Common questions
How did Hillsdale High School do on state tests?
In spring 2026, 68% of students met or exceeded the reading (ELA) standard and 43% met the math standard, compared with 49% and 38% across California.
How many students attend Hillsdale High School?
1,517 students were enrolled in the 2025-26 school year, in grades 9-12.
How many Hillsdale High School students get into UC?
For fall 2025, 114 of 155 UC freshman applicants from Hillsdale High School were admitted. Of the class of 2022-23, 9% enrolled at a UC campus within 16 months.
How much do homes cost near Hillsdale High School?
The typical home value in ZIP code 94403, where Hillsdale High School is located, is $1.81M, up 6.8% over the past year (Zillow Home Value Index). Prices inside the school's attendance zone can differ.
Does living near Hillsdale High School guarantee a spot?
No. Public schools assign students by attendance zone, which San Mateo Union High sets and can change. Confirm the zone for a specific address with the district before you buy or rent.