The 2024 San Mateo County elections were held on November 5, 2024, in San Mateo County, California, with nonpartisan blanket primary elections for certain offices being held on March 5.

Three of the five seats of the Board of Supervisors are up for election.

Municipal elections in California are officially nonpartisan; candidates' party affiliations do not appear on the ballot.

Dave Pine Jackie Speier The incumbent is Dave Pine, who has represented the district since 2011 and was re-elected in 2020.

The incumbent is Warren Slocum, who has represented the district since 2013 and was re-elected in 2020.