Talyllyn or Tal-y-llyn can refer to:
*
Tal-y-llyn, Gwynedd, the hamlet and former parish in Gwynedd in Wales
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Tal-y-llyn Lake, a glacial ribbon lake east of Abergynolwyn
**
Talyllyn Railway, a preserved narrow gauge railway running from Tywyn to Abergynolwn
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''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
Talyllyn Junction was a railway junction located east of Brecon, Powys, opened in 1869. The junction was triangular, with north, east and west chords, station platforms being sited at the western junction and also, until 1878, at the eastern j ...
, 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
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