Pen-y-graig (Welsh for ) may refer to one of these places in Wales:
Pen-y-graig (electoral ward), electoral ward in Rhondda Cynon Taf Penygraig, village and community in Rhondda Cynon Taf Pen-y-graig, Carmarthenshire, area of Llanelli, Carmarthenshire Pen-y-graig, Gwynedd, village in Gwynedd Pen-y-graig-goch, SSSI in Carmarthenshire , SSSI in Ceredigion Ffridd Pen-y-Graig, hill in Powys Pen-y-Graig-fawr, hill in Powys Mynydd Pen-y-graig, hill in Rhondda Cynon Taf
See also Penygraigwen, village in Anglesey Pencraig (disambiguation)