Ruthin is the county town of Denbighshire in north Wales as well as an area in the southerly part of the Vale of Clwyd. The older town, the castle as well as St Peter's Square lie on a hill, but several more recent components in the flood plain of the River Clwyd. This arised numerous times in the late 1990s-- flood-control jobs setting you back £ 3 million were finished in fall 2003. Ruthin is skirted by villages such as Pwllglas and Rhewl. The name comes from the Welsh words rhudd (red) and hullabaloo (fort), mirroring the colour of the sandstone bedrock, of which the castle was integrated in 1277-- 1284. The initial name was Castell Coch yng Ngwern-fôr (Red Castle in the Sea Swamps). The mill neighbors. Maen Huail is a signed up ancient monument attributed to the brother of Gildas and also King Arthur, located outside Barclays Bank in St Peter's Square. The population at the 2001 Census was 5,218, of whom 47 percent were male and also 53 percent woman. The typical age of the population was 43.0 years as well as the population is 98.2 per cent "white". According to the 2011 census, 68 per cent were born in Wales and 25 percent in England. Welsh speakers make up 42 per cent of the town's population.