Collected and spent
In fiscal year 2024, San Mateo County collected $1,061.5M in taxes and spent $1,944.2M.
Collected
$1,061.5M
Fiscal year 2024 · taxes
Spent
$1,944.2M
Fiscal year 2024
Where the money comes from
One tax.
Property tax, the 1% base
$1 per $100 of value
the home's full cash value as Proposition 13 sets it: the price paid, rising at most 2% a year · Set by the California Constitution (Proposition 13); the county collects it and shares it with the cities, schools and districts by a state formula
Source · California Legislative Information, Prop 13. Read on October 15, 2026.
Details
Prop 13 (CA Const. Art. XIII A §1)Where it goes
Eight service lines.
Police
$501.3M
Health and human services · Health and sanitation
$474.2M
Health and human services · Public assistance
$412.1M
Public works · Capital outlay
$273.4M
General government
$183.4M
Debt service · past obligation
$50.4M
Public works · Public ways and facilities
$27.5M
Parks and recreation
$21.9M
Bars in both tables share one scale. Hatched lines pay for past obligations, not current services.
Source · County of San Mateo, California — Annual Comprehensive Financial Report, Fiscal Year Ended June 30, 2024. Read on June 22, 2026.
Details
County of San Mateo, California — Annual Comprehensive Financial Report, Fiscal Year Ended June 30, 2024; Statement of Revenues, Expenditures, and Changes in Fund Balances — Governmental Funds, Total column; amounts reported in thousandsWho decides
The 5 supervisors run the county. They pass the budget each year. They also set the county tax rates.
Jackie Speier
Supervisor, District 1
Term end not published
Re-check by November 3, 2026
Noelia Corzo
Supervisor, District 2
Term end not published
Re-check by November 3, 2026
Ray Mueller
Supervisor, District 3
Term end not published
Re-check by November 3, 2026
Lisa Gauthier
Supervisor, District 4
Term end not published
Re-check by November 3, 2026
David Canepa
Supervisor, District 5
Term end not published
Re-check by November 3, 2026
Source · California Legislative Information, Cal. Rev. & Tax. Code §2151. Read on October 10, 2026.
Details
Cal. Rev. & Tax. Code §2151 (tax rates); Gov. Code §29088 (budget adoption) (read 2026-10-10)When decisions happen
The board must pass the final budget by October 2. By June 30, it okays a draft budget so it can spend.
Each yearThe county budget year runs July 1 to June 30.
Next electionThe next general election is November 3, 2026.
Supervisors are elected at the June primary in even years.
How to reach it
Clerk of the Board, 500 County Center, 5th Floor, Redwood City, CA 94063
Mailing address
Source · California Legislative Information, Cal. Gov. Code §29001(e). Read on October 10, 2026.
Details
Cal. Gov. Code §29001(e) (fiscal year July 1 through June 30); §29088 (adopt by October 2); §29064 (June 30 recommended budget) (read 2026-10-10)Also on this tax bill
A San Mateo County address pays these governments too. Which school districts, cities and special districts apply depends on the address.
On every bill in San Mateo County
On some bills, depending on the address
School districts: 22. Find yours by address.
Cities: 21. Find yours by address.
Special districts: 1
Sources
Collected
County of San Mateo, California — Annual Comprehensive Financial Report, Fiscal Year Ended June 30, 2024. Read on June 22, 2026.
Details
County of San Mateo, California — Annual Comprehensive Financial Report, Fiscal Year Ended June 30, 2024; Statement of Revenues, Expenditures, and Changes in Fund Balances — Governmental Funds, Total column; amounts reported in thousandsSpent
County of San Mateo, California — Annual Comprehensive Financial Report, Fiscal Year Ended June 30, 2024. Read on June 22, 2026.
Details
County of San Mateo, California — Annual Comprehensive Financial Report, Fiscal Year Ended June 30, 2024; Statement of Revenues, Expenditures, and Changes in Fund Balances — Governmental Funds, Total column; amounts reported in thousandsTaxes
California Legislative Information, Prop 13. Read on October 15, 2026.
Details
Prop 13 (CA Const. Art. XIII A §1)Who decides
California Legislative Information, Cal. Rev. & Tax. Code §2151. Read on October 10, 2026.
Details
Cal. Rev. & Tax. Code §2151 (tax rates); Gov. Code §29088 (budget adoption) (read 2026-10-10)When decisions happen
California Legislative Information, Cal. Gov. Code §29001(e). Read on October 10, 2026.
Details
Cal. Gov. Code §29001(e) (fiscal year July 1 through June 30); §29088 (adopt by October 2); §29064 (June 30 recommended budget) (read 2026-10-10)How to reach it
County of San Mateo, San Mateo County Clerk of the Board page. Read on October 10, 2026.
Details
San Mateo County Clerk of the Board page (read 2026-10-10)What it does
County of San Mateo, California — Annual Comprehensive Financial Report, Fiscal Year Ended June 30, 2024. Read on June 22, 2026.
Details
County of San Mateo, California — Annual Comprehensive Financial Report, Fiscal Year Ended June 30, 2024; Statement of Revenues, Expenditures, and Changes in Fund Balances — Governmental Funds, Total column; amounts reported in thousandsTo act on what you have read
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