Hillsdale High School
| Name | Hillsdale High School |
| Grades | Class 09 to Class 12 |
| Address | 3115 Del Monte St. |
| City | San Mateo |
| School District | San Mateo Union High |
| County | San Mateo County |
| Zipcode | 94403-3800 |
| Phone No. | (650)558-2699 |
| State | California |
| City | Midsize |
| Students | 1689 |
| Teachers | 89 |
| Student Teacher Ratio | 19 students per teacher |
| Charter School | No |
| Magnet School | N/A |
Hillsdale High School is located at 3115 Del Monte St. in San Mateo city of San Mateo County county in California. This school comes under San Mateo Union High. You can call them at (650)558-2699 for more details. This is not a magnet school. Total one thousand six hundred eighty nine students from class 09 to class 12 study in this school who are taught by eighty nine teachers. This is not a charter school. The student teacher ratio of this school is 19.