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 8 public schools serving 8,736 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.
Public Schools 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
8 Schools
10,347 Schools
# Students
8,736 Students
5,790,405 Students
# Teachers
442 Teachers
267,593 Teachers
Student-Teacher Ratio
20:1
20:1

Student By Grade

District Rank

San Mateo Union High School District, which is ranked #190 of all 1,904 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 $30,029 is higher than the state median of $20,100. The school district revenue/student has grown by 17% over four school years.
The school district's spending/student of $26,262 is higher than the state median of $18,511. 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
$30,029
$20,100
Spending / Student
$26,262
$18,511

Best San Mateo Union High School District Public Schools (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 | 1,583 student Student-teacher ratio: 20:1 Minority enrollment: 59%
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 | 1,658 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 | 1,115 student Student-teacher ratio: 21:1 Minority enrollment: 89%
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 | 1,585 student Student-teacher ratio: 19:1 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 | 1,557 student Student-teacher ratio: 19:1 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 | 1,061 student Student-teacher ratio: 19:1 Minority enrollment: 83%
Rank: #77.
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 | 123 students Student-teacher ratio: 14:1 Minority enrollment: 94%
Rank: n/an/a
The Bridge Academy
Alternative School
798 East Poplar Ave
San Mateo, CA 94401
(650) 558-2271
Gr: 10-12 | 54 students Student-teacher ratio: 11:1

Frequently Asked Questions

How many schools belong to San Mateo Union High School District?
San Mateo Union High School District manages 8 public schools serving 8,736 students.
What is the rank of San Mateo Union High School District?
San Mateo Union High School District is ranked #190 out of 1,904 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 20:1, 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 $26,262 is higher than the state median of $18,511. The school district spending/student has grown by 7% over four school years.

Recent Articles

How Public Schools Train Staff Each Year
How Public Schools Train Staff Each Year
Learn how public schools train staff each year through professional development, safety training, technology instruction, and ongoing educational support.
What Substitute Teachers Experience in Public Schools
What Substitute Teachers Experience in Public Schools
Discover what substitute teachers experience in public schools, including daily responsibilities, challenges, rewards, and their role in student success.
How Teachers Collaborate Across Departments in Public Schools
How Teachers Collaborate Across Departments in Public Schools
Learn how teachers collaborate across departments to improve student outcomes, strengthen instruction, and prepare students for real-world success.

Quick Facts (2026)

  • District size: 8 schools
  • Grades: 09-12
  • Enrollment: 8,736 students
  • Student-Teacher Ratio: 20:1
  • 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

Quick Links


Notice: Undefined property: MultipleSchoolsModel::$total in /home/devsarath/workspace/psr/public_html/include/srn_lib/psr/view/RegionQuickLinksView.inc.php on line 75

Notice: Undefined property: MultipleSchoolsModel::$total in /home/devsarath/workspace/psr/public_html/include/srn_lib/psr/view/RegionQuickLinksView.inc.php on line 82

Notice: Undefined property: MultipleSchoolsModel::$total in /home/devsarath/workspace/psr/public_html/include/srn_lib/psr/view/RegionQuickLinksView.inc.php on line 88

Notice: Undefined property: MultipleSchoolsModel::$total in /home/devsarath/workspace/psr/public_html/include/srn_lib/psr/view/RegionQuickLinksView.inc.php on line 94

Notice: Undefined property: MultipleSchoolsModel::$total in /home/devsarath/workspace/psr/public_html/include/srn_lib/psr/view/RegionQuickLinksView.inc.php on line 100

Notice: Undefined property: MultipleSchoolsModel::$total in /home/devsarath/workspace/psr/public_html/include/srn_lib/psr/view/RegionQuickLinksView.inc.php on line 106

Notice: Undefined property: MultipleSchoolsModel::$total in /home/devsarath/workspace/psr/public_html/include/srn_lib/psr/view/RegionQuickLinksView.inc.php on line 112

Notice: Undefined property: MultipleSchoolsModel::$total in /home/devsarath/workspace/psr/public_html/include/srn_lib/psr/view/RegionQuickLinksView.inc.php on line 123

Notice: Javascript file does not exist: /home/devsarath/workspace/psr/public_html/javascript/components/popper.min.js in /home/devsarath/workspace/shared/misc/JSCompiler.inc.php on line 242

Notice: Javascript file does not exist: /home/devsarath/workspace/psr/public_html/javascript/components/tippy.min.js in /home/devsarath/workspace/shared/misc/JSCompiler.inc.php on line 242

Notice: Directory does not exist in /home/devsarath/workspace/shared/misc/JSCompiler.inc.php on line 242

Notice: Unable to save compiled js file in /home/devsarath/workspace/shared/misc/JSCompiler.inc.php on line 242