In New Jersey, a Board of County Commissioners (until 2020 named the Board of Chosen Freeholders) is the elected county-wide government board in each of the state's 21 counties. In the five counties that have an elected county executive, the board of county commissioners serves as the county legislature. In the remaining counties, the board of county commissioners exercises both executive and legislative functions, often with an appointed county administrator or manager overseeing the day-to-day operations of county government.
As of 2024[update], 18 of the 21 county commissions are held exclusively by one party; Atlantic, Gloucester, and Passaic counties are the only ones with both parties represented. Since 2000, 12 counties have only elected members from a single party; Camden, Essex, Hudson, Mercer, Middlesex, and Union counties have chosen only Democrats, and Cape May, Hunterdon, Morris, Ocean, Sussex, and Warren counties have chosen only Republicans.[1]