51±¬ÁÏ

San Mateo Union High School District

650 North Delaware St.
San Mateo, CA 94401-1795
(District boundaries shown in map)
10/
10
Top 10%

Top Rankings

San Mateo Union High School District ranks among the top 20% of public school district in California for:

Category
Attribute
Overall Rank
Highest overall rank (Top 10%)
Math Proficiency
Highest math proficiency (Top 20%)
Reading/Language Arts Proficiency
Highest reading/language arts proficiency (Top 5%)
Science Proficiency
Highest science proficiency (Top 20%)
Diversity
Most diverse schools (Top 1%)
Community Size
Largest student body (number of students) (Top 1%)
For the 2026 school year, there are 9 public schools serving 8,799 students in San Mateo Union High School District. This district's average testing ranking is 10/10, which is in the top 10% of public schools in California.
51±¬ÁÏs in San Mateo Union High School District have an average math proficiency score of 48% (versus the California public school average of 34%), and reading proficiency score of 76% (versus the 47% statewide average).
Minority enrollment is 76% of the student body (majority Hispanic), which is less than the California public school average of 80% (majority Hispanic).

Overview

This School District
This State (CA)
# Schools
9 Schools
10,357 Schools
# Students
8,799 Students
5,826,973 Students
# Teachers
457 Teachers
268,008 Teachers
Student-Teacher Ratio
19:1
19:1

Student By Grade

District Rank

San Mateo Union High School District, which is ranked #190 of all 1,908 school districts in California (based off of combined math and reading proficiency testing data) for the 2022-2023 school year.
The school district's graduation rate of 91% has decreased from 92% over five school years.
This School District
State Average (CA)
#171 out of 1932 school districts
(Top 10%)
49%
34%
76%
47%
51%
29%
91%
87%

Students by Ethnicity:

0.73
0.63
% American Indian
n/a
1%
% Asian
29%
12%
% Hispanic
35%
56%
% Black
1%
5%
% White
24%
20%
% Hawaiian
2%
n/a
% Two or more races
9%
6%
All Ethnic Groups

District Revenue and Spending

The revenue/student of $29,814 is higher than the state median of $19,974. The school district revenue/student has grown by 16% over four school years.
The school district's spending/student of $26,074 is higher than the state median of $18,395. The school district spending/student has grown by 7% over four school years.
This School District
This State (CA)
Total Revenue
$262 MM
$116,387 MM
Spending
$229 MM
$107,188 MM
Revenue / Student
$29,814
$19,974
Spending / Student
$26,074
$18,395

Best San Mateo Union High School District 51±¬ÁÏs (2026)

School
(Math and Reading Proficiency)
Location
Quick Facts
Rank: #11.
Burlingame High School
(Math: 65% | Reading: 85%)
Rank:
10/
10
Top 10%
1 Mangini Way
Burlingame, CA 94010
(650) 558-2899
Gr: 9-12 | 1,540 student Student-teacher ratio: 20:1 Minority enrollment: 58%
Rank: #22.
Aragon High School
(Math: 61% | Reading: 86%)
Rank:
10/
10
Top 10%
900 Alameda De Las Pulgas
San Mateo, CA 94402
(650) 558-2999
Gr: 9-12 | 1,686 student Student-teacher ratio: 22:1 Minority enrollment: 74%
Rank: #33.
Mills High School
(Math: 57% | Reading: 80-84%)
Rank:
10/
10
Top 10%
400 Murchison Dr.
Millbrae, CA 94030
(650) 558-2599
Gr: 9-12 | 1,119 student Student-teacher ratio: 20:1 Minority enrollment: 88%
Rank: #44.
Hillsdale High School
(Math: 39% | Reading: 71%)
Rank:
8/
10
Top 30%
3115 Del Monte St.
San Mateo, CA 94403
(650) 558-2699
Gr: 9-12 | 1,581 student Student-teacher ratio: 18:1 Minority enrollment: 69%
Rank: #55.
San Mateo High School
(Math: 38% | Reading: 68%)
Rank:
8/
10
Top 30%
506 North Delaware St.
San Mateo, CA 94401
(650) 558-2399
Gr: 9-12 | 1,578 student Student-teacher ratio: 18:1 Minority enrollment: 84%
Rank: #66.
Capuchino High School
(Math: 33% | Reading: 68%)
Rank:
8/
10
Top 30%
1501 Magnolia Ave.
San Bruno, CA 94066
(650) 558-2799
Gr: 9-12 | 1,108 student Student-teacher ratio: 19:1 Minority enrollment: 83%
Rank: #77.
Peninsula High School
Alternative School
(Math: ≤10% | Reading: 11-19% )
Rank:
1/
10
Bottom 50%
860 Hinckley Rd.
Burlingame, CA 94010
(650) 558-2499
Gr: 9-12 | 1 student
Rank: #88.
Peninsula High (Continuation School)
Alternative School
(Math: ≤10% | Reading: 11-19%)
Rank:
1/
10
Bottom 50%
860 Hinckley Rd.
Burlingame, CA 94010
(650) 558-2402
Gr: 9-12 | 186 students Student-teacher ratio: 14:1 Minority enrollment: 96%
Rank: n/an/a
The Bridge Academy
Alternative School
798 East Poplar Ave
San Mateo, CA 94401
(650) 558-2271

Frequently Asked Questions

How many schools belong to San Mateo Union High School District?
San Mateo Union High School District manages 9 public schools serving 8,799 students.
What is the rank of San Mateo Union High School District?
San Mateo Union High School District is ranked #190 out of 1,908 school districts in California (top 10%) based off of combined math and reading proficiency testing data for the 2022-2023 school year. This district ranks in the top 20% of California school districts for: Highest overall rank (Top 10%), Highest math proficiency (Top 20%), Highest reading/language arts proficiency (Top 5%), Highest science proficiency (Top 20%), Most diverse schools (Top 1%) and Largest student body (number of students) (Top 1%)
What is the racial composition of students in San Mateo Union High School District?
35% of San Mateo Union High School District students are Hispanic, 29% of students are Asian, 24% of students are White, 9% of students are Two or more races, 2% of students are Hawaiian, and 1% of students are Black.
What is the student/teacher ratio of San Mateo Union High School District?
San Mateo Union High School District has a student/teacher ratio of 19:1, which is lower than the California state average of 22:1.
What is San Mateo Union High School District's spending/student ratio?
The school district's spending/student of $26,074 is higher than the state median of $18,395. The school district spending/student has grown by 7% over four school years.

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Quick Facts (2026)

  • District size: 9 schools
  • Grades: 09-12
  • Enrollment: 8,799 students
  • Student-Teacher Ratio: 19:1
  • Minority Enrollment: 76%
  • : 91% (Top 30% in CA)
  • : Top 10%
  • : 49% (Top 20%)
  • : 76% (Top 5%)
  • : 51% (Top 20%)
  • Source: National Center for Education Statistics (NCES), CA Dept. of Education

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