Beacon is an electoral ward in Dorset. Since 2019, the ward has elected 1 councillor to Dorset Council.
The Beacon ward is rural and contains the civil parishes of Ashmore, Cann, Compton Abbas, East Orchard, Fontmell Magna, Guy's Marsh, Hammoon, Iwerne Courtney, Iwerne Minster, Iwerne Stepleton, Manston, Margaret Marsh, Melbury Abbas, Stour Provost, Stour Row, Sutton Waldron, Todber, West Orchard.