San Mateo County Primary 2026
April 8, 2026| San Mateo Assessor, County Clerk Recorder, and Chief Elections Officer | David Canepa |
| San Mateo County Superior Court Judge | Brian Donnellan |
| San Mateo County Board of Supervisors, District 2 | Noelia Corzo |
| San Mateo County Board of Supervisors, District 3 | Ray Mueller |



