Wiston (Welsh: Cas-Wis) is a village and community in Pembrokeshire, Wales, in the United Kingdom. It was once a marcher borough. Owen, in 1603, described it as one of nine Pembrokeshire "boroughs in decay"[1]. It continued as a constituent parliamentary borough (voting as part of the borough seat of Pembroke) until the end of the 19th century.
It is overlooked by Wiston Castle.
The community of Wiston includes the village plus Clarbeston, Clarbeston Road and Walton East.