Chirk Castle is a Grade I listed castle located in Chirk, Wrexham County Borough, Wales. It is now owned and run by the National Trust.

Chirk is a town and community in Wrexham County Borough, Wales, 10 miles south of Wrexham, between it and Oswestry. At the 2011 census, it had a population of 4,468. Historically in the traditional county of Denbighshire, and later Clwyd, it has been part of Wrexham County Borough since a local government reorganisation in 1996. The border with the English county of Shropshire is immediately south of the town, on the other side of the River Ceiriog.