The Ada County Board of Commissioners is a county legislative council with jurisdiction over Ada County, Idaho. The board consists of three elected commissioners who serve four-year terms. The board is responsible for managing the county's land usage and public services. The board has executive and policy-making power, in addition to the ability to appoint and remove county department heads.
There are three members of the board of commissioners, elected to serve four-year terms. The governor of Idaho has the ability to fill vacancies on the board.