Ewyas Lacy was an ancient hundred in south-west Herefordshire. It was part of the ancient Welsh region of Ewyas claimed by the de Lacy family following the Norman Conquest. It equated to the modern civil parishes of Craswall, Cusop, Llancillo, Llanveynoe, Longtown, Michaelchurch Escley, Newton, Rowlestone, St Margarets, and Walterstone.