Collected and spent
In fiscal year 2024, Contra Costa County collected $982.5M in taxes and spent $3,028.2M.
Collected
$982.5M
Fiscal year 2024 · taxes
Spent
$3,028.2M
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
Nine service lines.
Corrections
$1,180.7M
Health and human services · Public assistance
$722.2M
Health and human services · Health and sanitation
$566.9M
General government
$359.7M
Public works
$123.1M
Library
$45.3M
Debt service · Principal · past obligation
$19.3M
Debt service · Interest · past obligation
$9.1M
Parks and recreation
$1.8M
Bars in both tables share one scale. Hatched lines pay for past obligations, not current services.
Source · Contra Costa County ACFR FY2024. Read on June 15, 2026.
Details
Contra Costa County ACFR FY2024 — Statement of Revenues, Expenditures and Changes in Fund Balances, Governmental Funds, for the Fiscal Year Ended June 30, 2024Who decides
The 5 supervisors run the county. They pass the budget each year. They also set the county tax rates.
John Gioia
Supervisor, District 1
Term end not published
Re-check by November 3, 2026
Candace Andersen
Supervisor, District 2
Term end not published
Re-check by November 3, 2026
Diane Burgis
Supervisor, District 3
Term end not published
Re-check by November 3, 2026
Ken Carlson
Supervisor, District 4
Term end not published
Re-check by November 3, 2026
Shanelle Scales-Preston
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
County Administration Building, 1025 Escobar Street, Martinez, CA 94553
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 Contra Costa County address pays these governments too. Which cities and school districts apply depends on the address.
On every bill in Contra Costa County
CaliforniaStateEast Bay Regional Park DistrictSpecial districtSan Francisco Bay Area Rapid Transit District (BART)Special districtSan Francisco Bay Restoration Authority (Measure AA)Special district
On some bills, depending on the address
Cities: 24. Find yours by address.
School districts: 18
Liberty Union High School DistrictNot in Who Taxes Me yet
Mount Diablo Unified School DistrictSchool districtWest Contra Costa Unified School DistrictSchool districtSan Ramon Valley Unified School DistrictNot in Who Taxes Me yet
Acalanes Union High School DistrictNot in Who Taxes Me yet
Byron Union Elementary School DistrictNot in Who Taxes Me yet
Brentwood Union Elementary School DistrictNot in Who Taxes Me yet
Oakley Union Elementary School DistrictNot in Who Taxes Me yet
Martinez Unified School DistrictNot in Who Taxes Me yet
Antioch Unified School DistrictSchool districtKnightsen Elementary School DistrictNot in Who Taxes Me yet
Pittsburg Unified School DistrictNot in Who Taxes Me yet
Orinda Union Elementary School DistrictNot in Who Taxes Me yet
John Swett Unified School DistrictNot in Who Taxes Me yet
Livermore Valley Joint Unified School DistrictNot in Who Taxes Me yet
Lafayette Elementary School DistrictNot in Who Taxes Me yet
Moraga Elementary School DistrictNot in Who Taxes Me yet
Walnut Creek Elementary School DistrictNot in Who Taxes Me yet
Sources
Collected
Contra Costa County ACFR FY2024. Read on June 15, 2026.
Details
Contra Costa County ACFR FY2024 — Statement of Revenues, Expenditures and Changes in Fund Balances, Governmental Funds, for the Fiscal Year Ended June 30, 2024Spent
Contra Costa County ACFR FY2024. Read on June 15, 2026.
Details
Contra Costa County ACFR FY2024 — Statement of Revenues, Expenditures and Changes in Fund Balances, Governmental Funds, for the Fiscal Year Ended June 30, 2024Taxes
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
Contra Costa County, Contra Costa County Board of Supervisors page. Read on October 10, 2026.
Details
Contra Costa County Board of Supervisors page (footer) (read 2026-10-10)What it does
Contra Costa County ACFR FY2024. Read on June 15, 2026.
Details
Contra Costa County ACFR FY2024 — Statement of Revenues, Expenditures and Changes in Fund Balances, Governmental Funds, for the Fiscal Year Ended June 30, 2024To act on what you have read
Who Taxes Me describes. These three tools, made by the same team, are where you can do something about it. Each opens in a new tab.
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