Llanfair (Welsh for "St. Mary's Parish") may refer to:
Places
- Llanfair, Ceredigion; a small village in Mid Wales
- Llanfair, Gwynedd, a village in the Ardudwy area of Gwynedd
- Llanfair-is-gaer, a former parish in Arfon (district), Gwynedd
- Llanfair, Vale of Glamorgan, a community near Cowbridge
- Llanfair Caereinion, Powys; a small town in east central Wales
- Llanfair PG (Llanfairpwllgwyngyll), Anglesey; a village and community on the island of Anglesey in Wales
- Llanfair-Nant-Gwyn, hamlet in Pembrokeshire
- Other place-names in Wales beginning with Llanfair
- Llanfair, Alabama, USA
Fiction
- Llanfair (One Life to Live), the Lord family mansion on the American soap opera One Life to Live
Other
- Llanfair is a popular traditional Welsh hymn tune, often sung to the words "Hail the day that sees him rise" or "Gwyn a gwridog, hawddgar iawn".
- It may also be sung to the words of "Christ the Lord is risen today."