thumb|right|300px|Bokerley Dyke on Martin Down
Bokerley Dyke, Bokerly Dyke, Bokerley Ditch, is a linear earthwork long on Cranborne Chase in Dorset, partially running along the county's border with Hampshire between Woodyates and Martin. It is part of a Scheduled Monument together with Grim's Ditch and other associated earthworks. in advance of road widening in 1958. Bokerley Dyke may have originated in the Bronze Age or Early Iron Age and formed a political and cultural boundary. It was cut through by a Roman Road (Ackling Dyke running between Old Sarum and Badbury Rings) in the 1st century. A coin of Valens dates this activity to shortly after 364 AD.