San Mateo Union High

Summary:

The San Mateo Union High district consists of eight high schools serving grades 9-12 across several communities in San Mateo County, forming a high-performing district that significantly exceeds state averages in graduation rates, test scores, and attendance.

Among the comprehensive schools, Burlingame High, Aragon High, and Mills High stand out as top performers, consistently earning top state rankings with graduation rates above 95% and strong test proficiency. Aragon High achieves the district's highest graduation rate, while Burlingame High leads in math proficiency. Schools like San Mateo High and Capuchino High show solid performance but face greater challenges with chronic absenteeism.

The district also includes specialized schools like Peninsula High (Continuation) and The Bridge Academy, which serve students needing alternative education settings with much smaller class sizes and higher per-student funding. A key takeaway is the strong link between student attendance and academic success across all schools, and while the district excels in English, mathematics proficiency presents a common area for growth.

District Detail

650 North Delaware St.
San Mateo, CA 94401-1795

(650) 558-2299

SchoolDigger Rank:
240^th of 1543 California districts

See the 2025 California District rankings!

Grades served: 9-12
Students: 8,736

Primary Schools: 0
Middle Schools: 0
High Schools: 8
Alternative Schools: 0

Choose columns to see: Summary School Students/Teachers Ranking Test Scores Finance All

School													Students/Teachers											Ranking (2025)				Ranking (2024)				CAST Science (2025)		Smarter Balanced Assessments English Language Arts/Literacy (2025)		Smarter Balanced Assessments Mathematics (2025)		Per Pupil Expenditures (2024)
Name	Type	Grades	Address	City	Zip	County	District	Is Charter	Is Magnet	Is Virtual	Is Title I	Phone	Enrollment	Full-time Teachers	Student/ Teacher Ratio	Free/Discounted Lunch Recipients	White	Black	Hispanic	Asian	American Indian	Pacific Islander	Two or More Races	Average Standard Score (2025)	Statewide Rank (2025)	State Percentile (2025)	SchoolDigger Rating (2025)	Average Standard Score (2024)	Statewide Rank (2024)	State Percentile (2024)	Rank Change from Previous Year	CAST Science 12th Grade	CAST Science All Grades	Smarter Balanced Assessments English Language Arts/Literacy 11th Grade	Smarter Balanced Assessments English Language Arts/Literacy All Grades	Smarter Balanced Assessments Mathematics 11th Grade	Smarter Balanced Assessments Mathematics All Grades	Per Pupil Expenditures Total	Sub-total from Federal Funds	Sub-total from State/Local Funds
Aragon High	Public	9-12	900 Alameda de Las Pulgas	San Mateo	94402	San Mateo County	San Mateo Union High	No	(n/a)	No	(n/a)	(650) 558-2999	1,658	74	22.3	16.8%	433 (26.1%)	10 (0.6%)	450 (27.1%)	554 (33.4%)	0 (0.0%)	33 (2.0%)	177 (10.7%)	96.1	77^th of 2162 public high schools	96.4%		95.7	95^th of 2159 public high schools	95.6%	18	64.7	64.7	81.7	81.7	59.4	59.4	$16,420	$364	$16,056
Burlingame High	Public	9-12	1 Mangini Way	Burlingame	94010	San Mateo County	San Mateo Union High	No	(n/a)	No	(n/a)	(650) 558-2899	1,583	81	19.6	13.3%	645 (40.7%)	8 (0.5%)	315 (19.9%)	425 (26.8%)	0 (0.0%)	10 (0.6%)	179 (11.3%)	96.3	73^rd of 2162 public high schools	96.6%		98	43^rd of 2159 public high schools	98.0%	30	61.3	61.3	82.6	82.6	65.8	65.8	$17,636	$351	$17,285
Capuchino High	Public	9-12	1501 Magnolia Ave.	San Bruno	94066	San Mateo County	San Mateo Union High	No	(n/a)	No	(n/a)	(650) 558-2799	1,061	57	18.6	34.2%	174 (16.4%)	8 (0.8%)	584 (55.0%)	183 (17.2%)	0 (0.0%)	43 (4.1%)	67 (6.3%)	69.6	609^th of 2162 public high schools	71.8%		69.2	574^th of 2159 public high schools	73.4%	35	35.7	35.7	61.0	61.0	25.9	25.9	$19,054	$705	$18,349
Hillsdale High	Public	9-12	3115 Del Monte St.	San Mateo	94403	San Mateo County	San Mateo Union High	No	(n/a)	No	(n/a)	(650) 558-2699	1,585	82	19.3	25.2%	489 (30.9%)	16 (1.0%)	597 (37.7%)	313 (19.7%)	2 (0.1%)	16 (1.0%)	148 (9.3%)	85	314^th of 2162 public high schools	85.5%		82.7	364^th of 2159 public high schools	83.1%	50	39.4	39.4	72.0	72.0	41.9	41.9	$18,904	$543	$18,361
Mills High	Public	9-12	400 Murchison Dr.	Millbrae	94030	San Mateo County	San Mateo Union High	No	(n/a)	No	(n/a)	(650) 558-2599	1,115	54	20.4	20.3%	119 (10.7%)	3 (0.3%)	226 (20.3%)	655 (58.7%)	0 (0.0%)	11 (1.0%)	100 (9.0%)	95.3	90^th of 2162 public high schools	95.8%		93.3	150^th of 2159 public high schools	93.1%	60	49.0	49.0	81.9	81.9	63.3	63.3	$18,852	$445	$18,407
Peninsula High (Continuation)	Public	9-12	860 Hinckley Rd.	Burlingame	94010	San Mateo County	San Mateo Union High	No	(n/a)	No	(n/a)	(650) 558-2402	123	9	13.2	49.6%	7 (5.7%)	1 (0.8%)	93 (75.6%)	7 (5.7%)	0 (0.0%)	10 (8.1%)	5 (4.1%)	17.3	1736^th of 2162 public high schools	19.7%		10.6	2035^th of 2159 public high schools	5.7%	299	9.1	9.1	11.4	11.4	5.9	5.9	$26,384	$2,190	$24,194
San Mateo High	Public	9-12	506 North Delaware St.	San Mateo	94401	San Mateo County	San Mateo Union High	No	(n/a)	No	(n/a)	(650) 558-2399	1,557	80	19.5	38.1%	247 (15.9%)	15 (1.0%)	739 (47.5%)	405 (26.0%)	0 (0.0%)	30 (1.9%)	117 (7.5%)	83.9	334^th of 2162 public high schools	84.6%		87	279^th of 2159 public high schools	87.1%	55	43.4	43.4	63.3	63.3	44.3	44.3	$18,351	$501	$17,850
The Bridge Academy	Public	10-12	798 East Poplar Ave	San Mateo	94401	San Mateo County	San Mateo Union High	No	(n/a)	No	(n/a)	(650) 558-2271	54	5	10.7	83.3%	0 (0.0%)	0 (0.0%)	54 (100.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)								(n/a)

Districts nearby

District	Distance	# of Schools	Statewide Rank
San Mateo-Foster City	0.19 mi	22	476^th
Hillsborough City Elementary	0.89 mi	4	12^th
Burlingame Elementary	2.15 mi	8	94^th
San Mateo County Office of Education	2.61 mi	6
Belmont-Redwood Shores Elementary	2.69 mi	7	92^nd

See the top CA California districts

SchoolDigger data sources: National Center for Education Statistics, U.S. Department of Education, the U.S. Census Bureau and the California Department of Education.

IMPORTANT DISCLAIMERS: Not all boundaries are included. We make every effort to ensure that boundaries are up-to-date. But it's important to note that these are approximations and are for general informational purposes only. To verify legal descriptions of boundaries or school locations, contact your local tax assessor's office and/or school district.