  | Alamo Municipal Advisory Council | |
| | Alamo Police Services Advisory Committee (CSA) | |
| | Alcohol and Other Drugs Advisory Board | |
| | Assessment Appeals Board | Serves as the mandated County Board of Equalization to equalize and assess the value of taxable property in the County for purposes of taxation, and to hear appeals of property assessments. |
| | Aviation Advisory Committee, Contra Costa County | Collaborates with multiple partners in aviation to ensure safe and orderly airport operation; responds to concerns of airport patrons and the local community; provides a forum to evaluate policy matters concerning the airports, and advises the BOS. |
| | Citizens Advisory Committee - CCTA | |
| | Clerk of Board | |
| | Contra Costa Co. Local Enforcement Agency (LEA) Hearing Panel | |
| | Contra Costa County Mental Health Commission | Advisory Body to the Board of Supervisors on matters pertaining to mental health. |
| | Contra Costa County Oversight Board (Successor Agency) | |
| | Contra Costa County Sustainability | |
| | Contra Costa Fire Protection District Advisory Fire Commission | |
| | Contra Costa Watershed Forum | |
| | County Planning Commission | |
| | Countywide Bicycle Committee | |
| | Diablo MAC | |
| | Dougherty Valley Oversight Committee | |
| | East Contra Costa Habitat Conservancy | |
| | Economic Opportunity Council | |
| | Emergency Medical Care Committee | |
| | Family & Children's Trust Committee | |
| | First 5 Contra Costa Children and Families Commission | |
| | Fish & Wildlife Committee | |
| | Historical Landmarks Advisory Committee | |
| | Homelessness Advisory Board, Contra Costa Inter-jurisdictional Council on | |
| | Housing Authority Board of Commissioners | |
| | Integrated Pest Management Advisory Committee | |
| | Iron Horse Corridor Advisory Committee | |
| | Keller Canyon Mitigation Fund Review Committee | |
| | Knightsen Town Advisory Council | |
| | Managed Care Commission | |
| | Oversight Board for Successor Agencies of former Redevelopment Agencies in the County | |
| | Pleasant Hill BART Leasing Authority | |
| | Racial Justice Task Force | Racial Justice Task Force |
| | Southwest Area Transportation | |
| | Sustainability Commission | |
| | TRANSPLAN | |
| | Transportation Partnership and Cooperation Committee (TRANSPAC) | |
| | Transportation, Water, and Infrastructure (TWIC) | |
| | Tri-Valley Transportation Council (TVTC) | |
| | Zoning Administrator | |