Ruthin is a market town and community located in Denbighshire, Wales, situated in the southern portion of the Vale of Clwyd. The town center, which includes the castle and St Peter's Square, sits on a hill surrounded by nearby villages such as Pwllglas and Rhewl.
The name Ruthin is derived from the Welsh words rhudd (red) and din (fort), referring to the red sandstone bedrock used to construct the town's castle between 1277 and 1284. Notable landmarks in the area include the Old Mill and Maen Huail, a registered ancient monument in St Peter's Square associated with King Arthur and Hueil mab Caw.