Hillsdale High School is a public co-educational high school in San Mateo, California, serving grades 9–12 as part of the San Mateo Union High School District. Hillsdale generally serves the residents of San Mateo and Foster City.
Serving 1,581 students in grades 9-12, Hillsdale High School ranks in the top 30% of all schools in California for overall test scores (math proficiency is top 50%, and reading proficiency is top 50%).
The percentage of students achieving proficiency in math is 39% (which is higher than the California state average of 34%). The percentage of students achieving proficiency in reading/language arts is 71% (which is higher than the California state average of 47%).
The student-teacher ratio of 18:1 is lower than the California state level of 21:1.
Minority enrollment is 69% of the student body (majority Hispanic), which is lower than the California state average of 80% (majority Hispanic).
Quick Facts (2025)
- Grades: 9-12
- Enrollment: 1,581 students
- Student-Teacher Ratio: 18:1
- Minority Enrollment: 69%
- Graduation Rate: 91% (Top 50% in CA)
- Overall Testing Rank: Top 30%
- Math Proficiency: 39% (Top 50%)
- Reading Proficiency: 71% (Top 20%)
- Science Proficiency: 39% (Top 30%)
- Source: National Center for Education Statistics (NCES), CA Dept. of Education
Top Rankings
Hillsdale High School ranks among the top 20% of public schools in California for:
Category
Attribute
Reading/Language Arts Proficiency
Diversity
Student Attention
School Overview
Hillsdale High School's student population of 1,581 students has stayed relatively flat over five school years.
The teacher population of 86 teachers has stayed relatively flat over five school years.
Grades Offered
Grades 9-12
Total Students
1,581 students
Gender %
Total Classroom Teachers
86 teachers
Year Founded
1955
Colors
Scarlet, Columbia blue
School Calendar
Last Day of School
Fri. Jun 5, 2026
School Rankings
Hillsdale High School ranks within the top 30% of all 9,523 schools in California (based off of combined math and reading proficiency testing data).
The diversity score of Hillsdale High School is 0.72, which is more than the diversity score at state average of 0.63. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#2109 out of 9523 schools
(Top 30%)
(Top 30%)
Math Test Scores (% Proficient)
39%
34%
Reading/Language Arts Test Scores (% Proficient)
71%
47%
Science Test Scores (% Proficient)
39%
29%
Student-Teacher Ratio
18:1
21:1
American Indian
n/a
1%
Asian
20%
12%
Hispanic
37%
56%
Black
1%
5%
White
31%
20%
Hawaiian
1%
n/a
Two or more races
10%
6%
All Ethnic Groups
Graduation Rate
91%
87%
Eligible for Free Lunch
19%
54%
Eligible for Reduced Lunch
2%
8%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), CA Dept. of Education
Profile last updated: 02/09/2025
Frequently Asked Questions
What is Hillsdale High School's ranking?
Hillsdale High School is ranked #2109 out of 9,523 schools, which ranks it among the top 30% of public schools in California.
What schools are Hillsdale High School often compared to?
Hillsdale High Schoolis often viewed alongside schools like Aragon High School, San Mateo High School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
39% of students have achieved math proficiency (compared to the 34% CA state average), while 71% of students have achieved reading proficiency (compared to the 47% CA state average).
What is the graduation rate of Hillsdale High School?
The graduation rate of Hillsdale High School is 91%, which is higher than the California state average of 87%.
How many students attend Hillsdale High School?
1,581 students attend Hillsdale High School.
What is the racial composition of the student body?
37% of Hillsdale High School students are Hispanic, 31% of students are White, 20% of students are Asian, 10% of students are Two or more races, 1% of students are Black, and 1% of students are Hawaiian.
What is the student-teacher ratio of Hillsdale High School?
Hillsdale High School has a student ration of 18:1, which is lower than the California state average of 21:1.
What grades does Hillsdale High School offer ?
Hillsdale High School offers enrollment in grades 9-12
What school district is Hillsdale High School part of?
Hillsdale High School is part of San Mateo Union High School District.
In what neighborhood is Hillsdale High School located?
Hillsdale High School is located in the Beresford Park neighborhood of San Mateo, CA. There are 2 other public schools located in Beresford Park.
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