Yolo County Government: Board of Supervisors and County Services

Yolo County occupies the western edge of the Sacramento metropolitan region, separated from Sacramento City by the Sacramento River and governed by a charter county structure under California law. This page covers the composition and authority of the Yolo County Board of Supervisors, the range of county-administered services, how decisions flow through county government, and where Yolo County's jurisdiction ends and adjacent authorities begin. Understanding Yolo County's structure is relevant to residents, businesses, and organizations operating in cities such as Davis, Woodland, and West Sacramento, as well as in unincorporated portions of the county.

Definition and scope

Yolo County is a general law county operating under the California Constitution and the California Government Code. Its governing body, the Board of Supervisors, consists of 5 members, each elected by district to 4-year terms on a staggered schedule (California Government Code § 25000 et seq.). The Board functions simultaneously as the county legislature, setting policy and adopting ordinances, and as the county's executive authority for matters not delegated to independently elected officers.

Yolo County covers approximately 1,023 square miles and includes 4 incorporated cities — Davis, Woodland, West Sacramento, and Winters — along with unincorporated communities such as Esparto, Knights Landing, and Clarksburg. The county seat is Woodland. Residents of the 4 incorporated cities are subject to both city government authority and county authority for services the county delivers countywide; residents of unincorporated Yolo County rely on county departments for nearly all local government services, including land use permitting, road maintenance, and code enforcement.

Scope, coverage, and limitations: This page addresses Yolo County government only. It does not cover Sacramento County government structure, Sacramento City government, or the governments of Placer County and El Dorado County, each of which maintains independent elected bodies and service departments. The cities of Davis and Woodland have separate city councils, budgets, and municipal codes that operate independently of county authority within their incorporated boundaries. State agencies headquartered in the Sacramento region — including the California Department of Food and Agriculture, which maintains significant operations in Yolo County — exercise regulatory authority that supersedes or supplements county rules in designated areas.

How it works

The Board of Supervisors holds plenary authority over the county budget, county ordinances, land use policy in unincorporated areas, and appointments to county commissions and advisory bodies. The Board also appoints the County Administrator, who manages day-to-day operations of county departments and coordinates budget preparation for Board approval.

Alongside the Board, Yolo County voters directly elect 6 officers whose independence from Board control is established by California Government Code § 24000:

1. Sheriff-Coroner — law enforcement in unincorporated areas and county detention facilities
2. District Attorney — felony and misdemeanor prosecution
3. Assessor — valuation of all taxable property in the county
4. Auditor-Controller — financial accounting, payroll, and property tax administration
5. Clerk-Recorder — vital records, property records, and elections administration
6. Treasurer-Tax Collector — investment of county funds and collection of property taxes

This structure creates a distinction between Board-controlled departments and independently elected offices. The Board sets overall budget appropriations for elected officers but cannot direct their operational decisions. The County Administrator, by contrast, directly manages departments such as Planning, Public Works, Health and Human Services, and General Services.

Yolo County Board meetings are held in Woodland and are subject to the California Ralph M. Brown Act (Government Code § 54950 et seq.), which requires public notice at least 72 hours before regular meetings and mandates open public comment opportunities on agenda items.

Common scenarios

Three practical situations illustrate how Yolo County government authority operates for residents and businesses:

Scenario 1 — Land use in unincorporated Yolo County. A property owner seeking a conditional use permit for an agricultural processing facility outside any city boundary submits applications to the Yolo County Planning and Public Works Department. The county Planning Commission makes an initial recommendation; the Board of Supervisors has final authority on discretionary approvals involving environmental review under the California Environmental Quality Act (CEQA).

Scenario 2 — Property tax dispute. A Yolo County property owner who believes their assessed value is incorrect files an Assessment Appeal with the Assessment Appeals Board, a 3-member body appointed by the Board of Supervisors but operating independently of both the Board and the Assessor under California Revenue and Taxation Code § 1620. The Clerk-Recorder's office manages elections to the board of supervisors itself, ensuring that the same office administering assessments is not the body hearing appeals.

Scenario 3 — Public health services. Yolo County Health and Human Services Agency administers the Medi-Cal program locally under a contract with the California Department of Health Care Services. County residents who qualify for Medi-Cal enroll through county offices; the state sets eligibility rules, and the county manages enrollment and case management within those rules. This intergovernmental arrangement is typical of California's county-administered, state-funded human services model.

Decision boundaries

Understanding what Yolo County government can and cannot do clarifies which entity to approach for a given issue.

Board authority vs. city authority: The Board of Supervisors holds zoning and land use authority only over unincorporated territory. Within West Sacramento, Davis, or Woodland, zoning decisions belong to each city's council. The Board cannot override city land use decisions within incorporated boundaries.

County authority vs. state authority: California state agencies preempt county authority in areas including public utility regulation, highway design on state routes, and professional licensing. The California Department of Transportation (Caltrans) controls State Route 113 and Interstate 80 within Yolo County regardless of county preferences.

Yolo County vs. regional bodies: The Sacramento Area Council of Governments (SACOG) serves as the federally designated Metropolitan Planning Organization for the region, including Yolo County, and holds authority to distribute federal transportation funds under Title 23 of the U.S. Code. SACOG's regional transportation decisions bind Yolo County to the extent federal funding conditionality applies, but SACOG does not replace county or city authority over local roads funded without federal dollars.

Elected officers vs. Board control: The Sheriff-Coroner, District Attorney, and other independently elected officers set their own operational priorities. The Board allocates their budget but cannot instruct the Sheriff on enforcement priorities or the District Attorney on charging decisions — a structural separation embedded in California Government Code § 24000.

Residents seeking a broader orientation to the Sacramento region's overlapping governments can access the site index as a starting reference for navigating the full network of county, city, and regional authorities in the metro area. The county's relationship with Sacramento-area regional governance is further explored at Sacramento intergovernmental relations.

References

• Yolo County Board of Supervisors — Official Site
• Yolo County Health and Human Services Agency
• California Government Code § 25000 — County Board of Supervisors
• California Government Code § 24000 — Elected County Officers
• California Government Code § 54950 — Ralph M. Brown Act
• California Revenue and Taxation Code § 1620 — Assessment Appeals
• Sacramento Area Council of Governments (SACOG)
• U.S. EPA — Transportation Conformity Guidance
• California Department of Health Care Services — Medi-Cal