County directory · California · 2026–27
School districts in San Mateo County, CA
San Mateo County has 24 regular public school districts, enrolling 78,008 students in 2024–25. The largest is San Mateo-Foster City (9,926 students, 13% of the county), followed by San Mateo Union High and Sequoia Union High. 21 of the 24 offer kindergarten. California's kindergarten cutoff: turn 5 by September 1.
The 24 districts, largest first
| District and office | Grades | Schools | Students | Kindergarten | District office contact |
|---|---|---|---|---|---|
| San Mateo-Foster City 1170 Chess Dr., Foster City | K–8 | 22 | 9,926 | 1,425 | (650) 312-7700 |
| San Mateo Union High 650 North Delaware St., San Mateo | 9–12 | 8 | 8,775 | — | (650) 558-2299 |
| Sequoia Union High 480 James Ave., Redwood City | 9–12 | 6 | 8,516 | — | (650) 369-1411 |
| South San Francisco Unified 398 B St., South San Francisco | K–12 | 17 | 7,664 | 643 | (650) 877-8700 |
| Redwood City Elementary 750 Bradford St., Redwood City | K–8 | 12 | 6,394 | 945 | (650) 482-2200 |
| Jefferson Elementary 101 Lincoln Ave., Daly City | K–12 | 14 | 4,952 | 688 | (650) 991-1000 |
| Belmont-Redwood Shores Elementary 1075 Old County Rd., Belmont | K–8 | 7 | 3,914 | 517 | (650) 637-4800 |
| Jefferson Union High 123 Edgemont Dr., Daly City | 9–12 | 5 | 3,715 | — | (650) 550-7900 |
| Burlingame Elementary 1825 Trousdale Dr., Burlingame | K–8 | 8 | 3,380 | 484 | (650) 259-3800 |
| San Carlos Elementary 1200 Industrial Rd. Unit 9, San Carlos | K–8 | 9 | 2,877 | 472 | (650) 508-7333 |
| Menlo Park City Elementary 181 Encinal Ave., Atherton | K–8 | 4 | 2,685 | 401 | (650) 321-7140 |
| Pacifica 375 Reina del Mar Ave., Pacifica | K–8 | 7 | 2,652 | 380 | (650) 738-6600 |
| Cabrillo Unified 498 Kelly Ave., Half Moon Bay | K–12 | 7 | 2,562 | 248 | (650) 712-7100 |
| Millbrae Elementary 555 Richmond Dr., Millbrae | K–8 | 5 | 2,107 | 275 | (650) 697-5693 |
| San Bruno Park Elementary 500 Acacia Ave, San Bruno | K–8 | 5 | 2,003 | 317 | (650) 624-3101 |
| Ravenswood City Elementary 2120 Euclid Ave., East Palo Alto | K–8 | 4 | 1,449 | 183 | (650) 329-2800 |
| Hillsborough City Elementary 300 El Cerrito Ave, Hillsborough | K–8 | 4 | 1,241 | 158 | (650) 342-5193 |
| Las Lomitas Elementary 1011 Altschul Ave., Menlo Park | K–8 | 2 | 1,138 | 180 | (650) 854-6311 |
| Portola Valley Elementary 4575 Alpine Rd., Portola Valley | K–8 | 2 | 495 | 89 | (650) 851-1777 |
| Brisbane Elementary 1 Solano St., Brisbane | K–8 | 3 | 484 | 76 | (415) 467-0550 |
| Woodside Elementary 3195 Woodside Rd., Woodside | K–8 | 1 | 385 | 70 | (650) 851-1571 |
| Bayshore Elementary 155 Oriente St., Daly City | K–8 | 1 | 342 | 46 | (415) 467-5443 |
| La Honda-Pescadero Unified 360 Butano Cut Off, Pescadero | K–12 | 3 | 272 | 37 | (650) 879-0286 |
| San Mateo County Office of Education 101 Twin Dolphin Dr., Redwood City | K–12 | 5 | 80 | 1 | (650) 802-5300 |
San Mateo County at a glance
Together the 24 districts run 161 schools from offices in 20 towns. The smallest by enrollment is San Mateo County Office of Education, with 80 students; the median San Mateo County district has 2,562. By grade span: 16 K–8, 5 K–12 and 3 9–12. Without kindergarten: San Mateo Union High (9–12), Sequoia Union High (9–12) and Jefferson Union High (9–12).
Kindergarten in 2024–25, counting the 21 districts that report a K grade: 7,635 children. The biggest kindergarten was San Mateo-Foster City's, with 1,425; Redwood City Elementary had 945, and the smallest, San Mateo County Office of Education, had 1.
San Mateo County holds 24 of California's 987 regular districts (2.4%) and 1.5% of its 5,201,297 public school students, ranking 15th of 58 counties by number of districts and 16th by enrollment. By size, 5 enroll 5,000 or more, 13 enroll 1,000 to 4,999 and 6 have fewer than 1,000 students, and the average school here has about 485 students.
Which district am I in?
Each district draws its own attendance zones, so your home address decides it. There is no address lookup here; ask the district. Each one's own site:
San Mateo-Foster City · San Mateo Union High · Sequoia Union High · South San Francisco Unified · Redwood City Elementary · Jefferson Elementary · Belmont-Redwood Shores Elementary · Jefferson Union High · Burlingame Elementary · San Carlos Elementary · Menlo Park City Elementary · Pacifica · Cabrillo Unified · Millbrae Elementary · San Bruno Park Elementary · Ravenswood City Elementary · Hillsborough City Elementary · Las Lomitas Elementary · Portola Valley Elementary · Brisbane Elementary · Woodside Elementary · Bayshore Elementary · La Honda-Pescadero Unified · San Mateo County Office of Education
What grade will my child be in?
More in California
Every California district by county · California kindergarten cutoff
More California county directories: Fresno County (30) · Santa Barbara County (21) · Santa Clara County (31) · Santa Cruz County (13) · Sonoma County (41) · Stanislaus County (25)