Talley Abbey (Welsh: Abaty Talyllychau) is a ruined former monastery of the Premonstratensians ("White Canons") in the village of Talley in Carmarthenshire, Wales, six miles (10 km) north of the market town of Llandeilo. It lies in the River Cothi valley. Access to the site of the abbey is free, and the site is maintained by Cadw.