Colwyn Castle was a medieval castle near Llansantffraed in Wales.

In the Manor of Glascwm, in the county of Radnorshire.It was built on the site of a Roman fort.

The castle was captured in 1196 by Rhys ap Gruffydd, who was campaigning against the Normans.

[1] It was rebuilt in 1242 by Ralph de Mortimer to protect the lordship of Maelienydd, which he had recently acquired.

This article about a Welsh castle is a stub.