Powys Castle (Powis Castle) is a medieval castle situated near Welshpool in Powys, Wales. The castle is located in the Welsh Marches, an area of Wales on the border with England. The castle was built in the late 13th century by the powerful Marcher lord, Gruffudd ap Gwenwynwyn, and was the family seat of the powerful House of Powys. The castle is a Grade I listed building and is now owned by the National Trust.

The castle is notable for its impressive entrance gatehouse and its impressive keep, which stands on a motte overlooking the River Severn. The castle is surrounded by a moat and has a number of towers, including a gatehouse and a gate tower. The castle also boasts an impressive Great Hall and a large chapel. Over the centuries, Powys Castle has been the site of many important events and is a popular tourist attraction in the area.