Ewyas Lacy was an ancient hundred in southwest 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 parishes of Craswall, Cusop, Llancillo, Llanveynoe, Longtown (with Clodock), Michaelchurch Escley, Newton, Rowlestone, St Margarets, and Walterstone.
Ewyas Lacy ceased to exist as an administrative entity with the abolition of hundreds in the Local Government Act 1888. The final residual copyholds were converted to freeholds in the Law of Property Act 1922
- "History of Ewyas Lacy in Herefordshire". Vision of Britain. Retrieved 24 March 2013.
- "Ewyas Lacy". Pastscape. Retrieved 24 March 2013.