Llanrhaeadr-yng-Nghinmeirch is a village and local government community in Denbighshire, Wales, including the villages of Prion, Llanrhaeadr and Pentre Llanrhaeadr and several hamlets, including Saron, Pant Pastynog, Prion, Peniel and part of Mynydd Hiraethog. It lies in the Vale of Clwyd near the A525 road between Denbigh and Ruthin. It was also known under the anglicised spellings of Llanrhaiadr in Kinmerch in the nineteenth century, and Llanrhaiadr yn Cinmerch, officially until 6 September 1968. The Community population taken at the 2011 census was 1,038.