Talyllyn

Talyllyn or Tal-y-llyn can refer to:


 * Tal-y-llyn, Gwynedd, the hamlet and former parish in Gwynedd in Wales
 * Tal-y-llyn Lake, a glacial ribbon lake east of Abergynolwyn
 * Talyllyn Railway, a preserved narrow gauge railway running from Tywyn to Abergynolwn
 * Talyllyn (locomotive), one of the original locomotives of the Talyllyn Railway
 * Talyllyn and Llanfihangel Talyllyn, small settlements in the Powys community of Llangors
 * Talyllyn Junction, a nearby junction on the Mid Wales Railway in Powys
 * Tal-y-llyn, Anglesey, a former episcopal township on Anglesey
 * St Mary's Church, Tal-y-llyn, the township's church