San Mateo High

Grades 9–12 Public District: San Mateo Union High

506 North Delaware St., San Mateo, CA 94401 Map

Math (met standard)
48%
+16 state 32% · 2025-26
English (met standard)
62%
+5 state 57% · 2025-26
Science (met standard)
44%
+11 state 33% · 2025-26
Low income
38%
free or reduced-price lunch
Students
1,557
2024-25
Students per teacher
19.5
2024-25

Test score trends

Share of students who met or exceeded the state standard each year.

Latest results by grade

Grade Math English Science
Grade 11 48% state 32% · 2025-26 62% state 57% · 2025-26 —
All grades 48% state 32% · 2025-26 62% state 57% · 2025-26 44% state 33% · 2025-26
Results by year (all grades)
School year Math English Science
2025-26 48% state 32% 62% state 57% 44% state 33%
2024-25 44% state 31% 63% state 57% 43% state 28%
2023-24 43% state 28% 67% state 56% 43% state 27%
2022-23 38% state 27% 59% state 55% 45% state 27%
2021-22 45% state 27% 68% state 55% 44% state 27%
2018-19 50% state 32% 68% state 57% 15% state 26%
2017-18 45% state 31% 61% state 56% —
2016-17 42% state 32% 65% state 60% —
2015-16 53% state 32% 76% state 59% —
2014-15 48% state 30% 70% state 56% —

Graduation & college

4-year graduation rate
96%
state 88% · 2025-26
Graduates meeting UC/CSU (A–G)
64%
state 55% · 2025-26
College-going rate
80%
state 66% · 2022-23

Graduation rate: students who earned a regular diploma within four years. UC/CSU: share of graduates who completed the A–G courses required by the University of California and California State University. College-going: share of high school completers who enrolled in any college within 12 months.

Students

Race and ethnicity, 2024-25

Year-by-year history is loaded from the NCES Common Core of Data (2017-18 onward).

Nearby schools

Subject percentages show the share of students who met or exceeded the state standard.

Pick to compare
Burlingame High
Grades 9–12 · San Mateo Union High
1.0 mi
61%
+29 vs state
76%
+19 vs state
57%
+25 vs state
7% Average of math, English and science: 72% in 2022-23 → 65% in 2025-26 13% 1,583 White 41%
Aragon High
Grades 9–12 · San Mateo Union High
1.8 mi
65%
+33 vs state
81%
+24 vs state
63%
+30 vs state
Average of math, English and science: 69% in 2022-23 → 70% in 2025-26 17% 1,658 Asian 33%
Peninsula High (Continuation)
Grades 9–12 Alternative · San Mateo Union High
2.6 mi
3%
−29 vs state
10%
−47 vs state
12%
−21 vs state
4% Average of math, English and science: 4% in 2022-23 → 8% in 2025-26 50% 123 Hispanic 76%
Hillsdale High
Grades 9–12 · San Mateo Union High
3.2 mi
43%
+12 vs state
68%
+10 vs state
48%
+15 vs state
Average of math, English and science: 51% in 2022-23 → 53% in 2025-26 25% 1,585 Hispanic 38%
Mills High
Grades 9–12 · San Mateo Union High
3.5 mi
63%
+31 vs state
80%
+22 vs state
58%
+25 vs state
7% Average of math, English and science: 60% in 2022-23 → 67% in 2025-26 20% 1,115 Asian 59%
Hillcrest at Youth Services Center
Grades 5–12 Alternative · San Mateo County Office of Education
4.4 mi
0%
−32 vs state · 2018-19
0%
0%
−26 vs state · 2018-19
Average of math, English and science: 0% in 2023-24 → 0% in 2025-26 81% 16 Hispanic 81%
Gateway Center
Grades 6–12 Alternative · San Mateo County Office of Education
4.4 mi
0%
−32 vs state · 2015-16
7%
−52 vs state · 2015-16
— Not enough years of data 64% 11 Hispanic 82%
Design Tech High
Grades 9–12 Charter · Design Tech High District
4.7 mi
59%
+27 vs state
81%
+24 vs state
64%
+31 vs state
9% Average of math, English and science: 59% in 2022-23 → 68% in 2025-26 7% 567 White 41%
Capuchino High
Grades 9–12 · San Mateo Union High
4.8 mi
24%
−8 vs state
51%
−6 vs state
35%
+3 vs state
11% Average of math, English and science: 48% in 2022-23 → 37% in 2025-26 34% 1,061 Hispanic 55%