2026 Property Tax Due Dates
December 10
First installment
April 10
Second installment
Payment Methods
Online, Mail, In-Person
San Mateo County Treasurer
How to Pay
Online
Pay using credit card or e-check
By Mail
Mail check payable to San Mateo County Treasurer
In Person
Visit the Treasurer's office — 555 County Center, 1st Floor, Redwood City CA 94063, Mon-Fri 8am - 5pm
Other Counties in California
About San Mateo County
San Mateo County, officially the County of San Mateo, is a county located in the U.S. state of California. As of the 2020 United States census, the population was 764,442. Redwood City is the county seat, the third-most populated city in the county after Daly City and San Mateo.
Source: Wikipedia — content available under CC BY-SA 4.0
Related Resources
Get Deadline Reminders
We'll email you 14 days before your property taxes are due.
Due dates shown are for reference only. Contact your county treasurer's office to confirm official deadlines before making payments.