The Prince William Board of County Supervisors is the policy-making body for the government of Prince William County, Virginia.

The county is divided into seven magisterial districts: Brentsville, Coles, Gainesville, Neabsco, Occoquan, Potomac, and Woodbridge.

There is also a Chairman elected by the county at-large, bringing total Board membership to 8.

A Vice-Chairman and a Chairman Pro-Tem are selected by the Board from amongst its membership.

The current Chairman is Democrat Deshundra Jefferson.