San Mateo special election
March 4, 2025
- Election type: special
- Region: San Mateo, California
- Description: San Mateo County, California, special ballot measure election
Visit Ballotpedia.org(Opens in a new window) to learn what you're voting on this election.
Key deadlines in California
Voter registration deadlines
- Online: 15 days before Election Day
- By mail: Postmarked by 15 days before Election Day
- In person: Election Day (via same-day registration)
Absentee ballot request deadlines
- By mail: Received by 7 days before Election Day
- In person: Election Day
Absentee ballot return deadlines
- By mail: Postmarked by Election Day
- In person: Received by Election Day
Voting dates
- Early voting starts: 29 days before Election Day
- Early voting ends: 1 day before Election Day
- Election Day: March 4, 2025